Q1
BIOLOGY
Unit 5: Human Physiology
Match the following locations in organs with their respective features:
(a) Crypts of Lieberkuhn (i) Pancreas
(b) Glisson’s capsule (ii) Duodenum
(c) Islets of Langerhans (iii) Small intestine
(d) Brunner’s Glands (iv) Liver
- A. (iii) (iv) (i) (ii)
- B. (iii) (ii) (i) (iv)
- C. (iii) (i) (ii) (iv)
- D. (ii) (iv) (i) (iii)
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Q1
BIOLOGY
Unit 1: Diversity in Living World
From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :
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2019 (3 sets)
- A. Pteridophytes
- B. Gymnosperms
- C. Liverworts
- D. Mosses
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Q2
BIOLOGY
Unit 6: Reproduction
Extrusion of second polar body from egg nucleus occurs :
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Before entry of sperm into ovum
- B. Simultaneously with first cleavage
- C. After entry of sperm but before fertilization
- D. After fertilization
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Q3
BIOLOGY
Unit 9: Biotechnology and Its Applications
DNA precipitation out of a mixture of biomolecules can be achieved by treatment with :
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Methanol at room temperature
- B. Chilled chloroform
- C. Isopropanol
- D. Chilled ethanol
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Q4
BIOLOGY
Unit 5: Human Physiology
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to :
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2019 (3 sets)
- A. Proliferation of fibrous tissues and damage of the alveolar walls
- B. Reduction in the secretion of surfactants by pneumocytes
- C. Benign growth on mucous lining of nasal cavity
- D. Inflammation of bronchi and bronchioles
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Q5
BIOLOGY
Unit 10: Ecology and Environment
The Earth summit held in Rio de Janeiro in 1992 was called :
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2019 (3 sets)
- A. to assess threat posed to native species by invasive weed species
- B. for immediate steps to discontinue use of CFCs that were damaging the ozone layer
- C. to reduce CO2 emissions and global warming
- D. for conservation of biodiversity and sustainable utilization of its benefits
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Q6
BIOLOGY
Unit 7: Genetics and Evolution
Match the hominids with their correct brain size :
(a) Homo habilis (i) 900 cc
(b) Homo neanderthalensis (ii) 1350 cc
(c) Homo erectus (iii) 650-800 cc
(d) Homo sapiens (iv) 1400 cc
↻ Repeated question — also appeared in
2019 (1 set)
- A. (1) (iii) (iv) (i) (ii)
- B. (2) (iv) (iii) (i) (ii)
- C. (3) (iii) (i) (iv) (ii)
- D. (4) (iii) (ii) (i) (iv)
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Q7
BIOLOGY
Unit 5: Human Physiology
How does steroid hormone influence the cellular activities ?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Activating cyclic AMP located on the cell membrane
- B. Using aquaporin channels as second messenger
- C. Changing the permeability of the cell membrane
- D. Binding to DNA and forming a gene-hormone complex
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Q8
BIOLOGY
Unit 7: Genetics and Evolution
Expressed Sequence Tags (ESTs) refers to :
↻ Repeated question — also appeared in
2019 (1 set)
- A. DNA polymorphism
- B. Novel DNA sequences
- C. Genes expressed as RNA
- D. Polypeptide expression
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Q9
BIOLOGY
Unit 4: Plant Physiology
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield ?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Gibberellin and Abscicic acid
- B. Cytokinin and Abscisic acid
- C. Auxin and Ethylene
- D. Gibberellin and Cytokinin
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Q9
BIOLOGY
Unit 4: Plant Physiology
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Gibberellin and Abscisic acid
- B. Cytokinin and Abscisic acid
- C. Auxin and Ethylene
- D. Gibberellin and Cytokinin
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Q10
BIOLOGY
Unit 10: Ecology and Environment
Which of the following ecological pyramids is generally inverted?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Pyramid of biomass in a forest
- B. Pyramid of biomass in a sea
- C. Pyramid of numbers in grassland
- D. Pyramid of energy
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Q10
BIOLOGY
Unit 10: Ecology and Environment
Which of the following ecological pyramids is generally inverted?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Pyramid of biomass in a forest
- B. Pyramid of biomass in a sea
- C. Pyramid of numbers in grassland
- D. Pyramid of energy
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Q11
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following pair of organelles does not contains DNA ?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Lysosomes and Vacuoles
- B. Nuclear envelope and Mitochondria
- C. Mitochodria and Lysosomes
- D. Chloroplast and Vacuoles
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Q11
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following pair of organelles does not contain DNA?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Lysosomes and Vacuoles
- B. Nuclear envelope and Mitochondria
- C. Mitochondria and Lysosomes
- D. Chloroplast and Vacuoles
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Q12
BIOLOGY
Unit 6: Reproduction
Select the correct sequence for transport of sperm cells in male reproductive system:
↻ Repeated question — also appeared in
2019 (1 set)
- A. Seminiferous tubules -> Vasa efferentia -> Epididymis -> Inguinal canal -> Urethra
- B. Testis -> Epididymis -> Vasa efferentia -> Vas deferens -> Ejaculatory duct -> Inguinal canal -> Urethra -> Urethral meatus
- C. Testis -> Epididymis -> Vasa efferentia -> Rete testis -> Inguinal canal -> Urethra
- D. Seminiferous tubules -> Rete testis -> Vasa efferentia -> Epididymis -> Vas deferens -> Ejaculatory duct -> Urethra -> Urethral meatus
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Q13
BIOLOGY
Unit 5: Human Physiology
Match the following hormones with the respective disease: (a) Insulin (i) Addison’s disease, (b) Thyroxin (ii) Diabetes insipidus, (c) Corticoids (iii) Acromegaly, (d) Growth Hormones (iv) Goitre, (v) Diabetes mellitus. Select the correct option.
- A. (a)-(v), (b)-(iv), (c)-(i), (d)-(iii)
- B. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
- C. (a)-(v), (b)-(i), (c)-(ii), (d)-(iii)
- D. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
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Q14
BIOLOGY
Unit 6: Reproduction
Persistent nucellus in the seed is known as
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Hilum
- B. Tegmen
- C. Chalaza
- D. Perisperm
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Q15
BIOLOGY
Unit 6: Reproduction
Pinus seed cannot germinate and establish without fungal association. This is because:
- A. it has very hard seed coat
- B. Its seed contain inhibitors that prevent germination
- C. its embryo is immature
- D. it has obligate association with mycorrhizae
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Q16
BIOLOGY
Unit 3: Cell Structure and Function
Cells in G0 phase:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. suspend the cell cycle
- B. terminate the cell cycle
- C. exit the cell cycle
- D. enter the cell cycle
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Q17
BIOLOGY
Unit 5: Human Physiology
Match the following structures with their respective location in organs: (a) Crypts of Lieberkuhn (i) Pancreas, (b) Glisson’s capsule (ii) Duodenum, (c) Islets of Langerhans (iii) Small intestine, (d) Brunner’s Glands (iv) Liver. Select the correct option.
↻ Repeated question — also appeared in
2019 (1 set)
- A. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- B. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- C. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
- D. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
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Q18
BIOLOGY
Unit 4: Plant Physiology
Grass leaves curl inward during very dry weather. Select the most appropriate reason from the following:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Shrinkage of air spaces in spongy mesophyll
- B. Tyloses in vessels
- C. Closure of stomata
- D. Flaccidity of bulliform cells
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Q18
BIOLOGY
Unit 4: Plant Physiology
Grass leaves curl inward during very dry weather. Select the most appropriate reason from the following:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Shrinkage of air spaces in spongy mesophyll
- B. Tyloses in vessels
- C. Closure of stomata
- D. Flaccidity of bulliform cells
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Q19
BIOLOGY
Unit 3: Cell Structure and Function
Consider the following statements:
(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.
Select the correct option.
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Both (A) and (B) are false
- B. (A) is false but (B) is true
- C. Both (A) and (B) are true
- D. (A) is true but (B) is false
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Q20
BIOLOGY
Unit 4: Plant Physiology
Respiratory Quotient (RQ) value of tripalmitin is:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. 0.07
- B. 0.09
- C. 0.9
- D. 0.7
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Q21
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements is incorrect?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Infective constituent in viruses is the protein coat
- B. Prions consist of abnormally folded proteins
- C. Viroids lack a protein coat
- D. Viruses are obligate parasites
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Q22
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Phloem in gymnosperms lacks:
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Companion cells only
- B. Both sieve tubes and companion cells
- C. Albuminous cells and sieve cells
- D. Sieve tubes only
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Q23
BIOLOGY
Unit 7: Genetics and Evolution
Under which of the following conditions will there be no change in the reading frame of the mRNA: 5' AACAGCGGUGCUAUU 3'?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Insertion of A and G at 4th and 5th positions respectively
- B. Deletion of GGU from 7th, 8th and 9th positions
- C. Insertion of G at 5th positions
- D. Deletion of G from 5th positions
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Q24
BIOLOGY
Unit 5: Human Physiology
Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes.
↻ Repeated question — also appeared in
2019 (1 set)
- A. Oxyntic Cells
- B. Duodenal Cells
- C. Chief Cells
- D. Goblet Cells
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Q25
BIOLOGY
Unit 4: Plant Physiology
What is the site of perception of photoperiod necessary for induction of flowering in plants?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Shoot apex
- B. Leaves
- C. Lateral buds
- D. Pulvinus
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Q26
BIOLOGY
Unit 5: Human Physiology
What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. 100 beats per minute
- B. 125 beats per minute
- C. 50 beats per minute
- D. 75 beats per minute
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Q26
BIOLOGY
Unit 5: Human Physiology
If the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL, what is the heart rate?
- A. 100 beats per minute
- B. 125 beats per minute
- C. 50 beats per minute
- D. 75 beats per minute
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Q27
BIOLOGY
Unit 5: Human Physiology
Tidal Volume and Expiratory Reserve Volume of an athlete are 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. 2200 mL
- B. 2700 mL
- C. 1500 mL
- D. 1700 mL
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Q27
BIOLOGY
Unit 5: Human Physiology
Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. 2200 mL
- B. 2700 mL
- C. 1500 mL
- D. 1700 mL
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Q28
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Placentation, in which ovules develop on the inner wall of the ovary or in peripheral part, is:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Parietal
- B. Free central
- C. Basal
- D. Axile
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Q28
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Placentation, in which ovules develop on the inner wall of the ovary or in peripheral part, is :
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Parietal
- B. Free central
- C. Basal
- D. Axile
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Q29
BIOLOGY
Unit 10: Ecology and Environment
Which of these following methods is the most suitable for disposal of nuclear waste?
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2019 (3 sets)
- A. Dump the waste within rocks under deep ocean
- B. Bury the waste within rocks deep below the Earth’s surface
- C. Shoot the waste into space
- D. Bury the waste under Antarctic ice-cover
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Q29
BIOLOGY
Unit 10: Ecology and Environment
Which of these following methods is the most suitable for disposal of nuclear waste?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Dump the waste within rocks under deep ocean
- B. Bury the waste within rocks deep below the Earth’s surface
- C. Shoot the waste into space
- D. Bury the waste under Antarctic ice-cover
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Q30
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statement is incorrect?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Conidia are produced exogenously and ascospores endogenously.
- B. Yeasts have filamentous bodies with long thread-like hyphae.
- C. Morels and truffles are edible delicacies.
- D. Claviceps is a source of many alkaloids and LSD.
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Q31
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?
- A. Industrial oven
- B. Bioreactor
- C. BOD incubator
- D. Sludge digester
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Q32
BIOLOGY
Unit 8: Biology and Human Welfare
Match the following organisms with the products they produce:
(a) Lactobacillus (i) Cheese
(b) Saccharomyces cerevisiae (ii) Curd
(c) Aspergillus niger (iii) Citric Acid
(d) Acetobacter aceti (iv) Bread
(v) Acetic Acid
↻ Repeated question — also appeared in
2019 (1 set)
- A. (a)-(iii), (b)-(iv), (c)-(v), (d)-(i)
- B. (a)-(ii), (b)-(i), (c)-(iii), (d)-(v)
- C. (a)-(ii), (b)-(iv), (c)-(v), (d)-(iii)
- D. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(v)
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Q33
BIOLOGY
Unit 7: Genetics and Evolution
Select the incorrect statement.
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Inbreeding selects harmful recessive genes that reduce fertility and productivity.
- B. Inbreeding helps in accumulation of superior genes and elimination of undesirable genes.
- C. Inbreeding increases homozygosity.
- D. Inbreeding is essential to evolve purelines in any animal.
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Q34
BIOLOGY
Unit 5: Human Physiology
Which of the following immune responses is responsible for rejection of kidney graft?
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2019 (3 sets)
- A. Inflammatory immune response
- B. Cell-mediated immune response
- C. Auto-immune response
- D. Humoral immune response
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Q35
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the statements given below is not true about formation of Annual Rings in trees?
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2019 (3 sets)
- A. Activity of cambium depends upon variation in climate.
- B. Annual rings are not prominent in trees of temperate region.
- C. Annual ring is a combination of spring wood and autumn wood produced in a year.
- D. Differential activity of cambium causes light and dark bands of tissue-early and late wood respectively
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Q36
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is true for Golden rice?
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2019 (2 sets)
- A. It is drought tolerant, developed using Agrobacterium vector.
- B. It has yellow grains, because of a gene introduced from a primitive variety of rice.
- C. It is Vitamin A enriched, with a gene from daffodil.
- D. It is pest resistant, with a gene from Bacillus thuringiensis.
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Q36
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is true for Golden rice?
↻ Repeated question — also appeared in
2019 (2 sets)
- A. It is drought tolerant, developed using Agrobacterium vector.
- B. It has yellow grains, because of a gene introduced from a primitive variety of rice.
- C. It is Vitamin A enriched, with a gene from daffodil.
- D. It is pest resistant, with a gene from Bacillus thuringiensis.
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Q37
BIOLOGY
Unit 7: Genetics and Evolution
What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Edward syndrome
- B. Down’s syndrome
- C. Turner’s syndrome
- D. Klinefelter’s syndrome
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Q37
BIOLOGY
Unit 7: Genetics and Evolution
What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Edward syndrome
- B. Down’s syndrome
- C. Turner’s syndrome
- D. Klinefelter’s syndrome
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Q38
BIOLOGY
Unit 6: Reproduction
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Central cell develop into endosperm
- B. Ovules develop into embryo sac
- C. Ovary develops into fruit
- D. Zygote develops into embryo
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Q39
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is the most important cause for animals and plants being driven to extinction?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Economic exploitation
- B. Alien species invasion
- C. Habitat loss and fragmentation
- D. Drought and floods
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Q40
BIOLOGY
Unit 6: Reproduction
Which of the following contraceptive methods do involve a role of hormone?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. CuT, Pills, Emergency contraceptives
- B. Pills, Emergency contraceptives, Barrier methods
- C. Lactational amenorrhea, Pills, Emergency contraceptives
- D. Barrier method, Lactational amenorrhea, Pills
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Q41
BIOLOGY
Unit 1: Diversity in Living World
Consider following features: (a) Organ system level of organisation (b) Bilateral symmetry (c) True coelomates with segmentation of body. Select the correct option of animal groups which possess all the above characteristics.
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Arthropoda, Mollusca and chordata
- B. Annelida, Mollusca and chordata
- C. Annelida, Arthropoda and chordata
- D. Annelida, Arthropoda and Mollusca
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Q42
BIOLOGY
Unit 5: Human Physiology
Which of the following factors is responsible for the formation of concentrated urine?
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2019 (3 sets)
- A. Secretion of erythropoietin by Juxtaglomerular complex.
- B. Hydrostatic pressure during glomerular filtration.
- C. Low levels of antidiuretic hormone.
- D. Maintaining hyperosmolarity towards inner medullary interstitum in the kidneys
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Q43
BIOLOGY
Unit 1: Diversity in Living World
Match the following organisms with their respective characteristics: (a) Pila (b) Bombyx (c) Pleurobrachia (d) Taenia (i) Flame cells (ii) Comb plates (iii) Radula (iv) Malpighian Tubules
↻ Repeated question — also appeared in
2019 (2 sets)
- A. (1) (ii) (iv) (iii) (i)
- B. (2) (iii) (ii) (iv) (i)
- C. (3) (iii) (ii) (i) (iv)
- D. (4) (iii) (iv) (ii) (i)
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Q44
BIOLOGY
Unit 4: Plant Physiology
Xylem translocates:
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Water, mineral salts and some organic nitrogen only
- B. Water, mineral salts, some organic nitrogen and hormones
- C. Water only
- D. Water and mineral salts only
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Q44
BIOLOGY
Unit 4: Plant Physiology
Xylem translocates:
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Water, mineral salts and some organic nitrogen only
- B. Water, mineral salts, some organic nitrogen and hormones
- C. Water only
- D. Water and mineral salts only
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Q45
BIOLOGY
Unit 4: Plant Physiology
What is the direction of movement of sugars in phloem?
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2019 (3 sets)
- A. Downward
- B. Bi-directional
- C. Non-multidirectional
- D. Upward
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Q45
BIOLOGY
Unit 4: Plant Physiology
What is the direction of movement of sugars in phloem?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Downward
- B. Bi-directional
- C. Non-multidirectional
- D. Upward
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Q46
BIOLOGY
Unit 3: Cell Structure and Function
The correct sequence of phases of cell cycle is:
↻ Repeated question — also appeared in
2019 (4 sets)
- A. S -> G1 -> G2 -> M
- B. G1 -> S -> G2 -> M
- C. M -> G1 -> G2 -> S
- D. G1 -> G2 -> S -> M
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Q46
BIOLOGY
Unit 3: Cell Structure and Function
The correct sequence of phases of cell cycle is:
↻ Repeated question — also appeared in
2019 (4 sets)
- A. S -> G1 -> G2 -> M
- B. G1 -> S -> G2 -> M
- C. M -> G1 -> G2 -> S
- D. G1 -> G2 -> S -> M
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Q47
BIOLOGY
Unit 3: Cell Structure and Function
The shorter and longer arms of a submetacentric chromosome are referred to as:
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2019 (3 sets)
- A. q-arm and p-arm respectively
- B. m-arm and n-arm respectively
- C. s-arm and l-arm respectively
- D. p-arm and q-arm respectively
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Q48
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following can be used as a biocontrol agent in the treatment of plant disease?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Anabaena
- B. Lactobacillus
- C. Trichoderma
- D. Chlorella
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Q49
BIOLOGY
Unit 5: Human Physiology
Which of the following glucose transporters is insulin-dependent?
↻ Repeated question — also appeared in
2019 (1 set)
- A. GLUT III
- B. GLUT IV
- C. GLUT I
- D. GLUT II
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Q50
BIOLOGY
Unit 7: Genetics and Evolution
Purines found both in DNA and RNA are:
↻ Repeated question — also appeared in
2019 (1 set)
- A. Guanine and cytosine
- B. Cytosine and thymine
- C. Adenine and thymine
- D. Adenine and guanine
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Q51
BIOLOGY
Unit 8: Biology and Human Welfare
Drug called ‘Heroin’ is synthesized by:
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2019 (3 sets)
- A. glycosylation of morphine
- B. nitration of morphine
- C. methylation of morphine
- D. acetylation of morphine
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Q52
BIOLOGY
Unit 5: Human Physiology
Select the correct option regarding human ribs.
- A. Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum
- B. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs
- C. 8th, 9th and 10th pairs of ribs articulate directly with the sternum
- D. 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.
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Q53
BIOLOGY
Unit 7: Genetics and Evolution
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
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- A. 0.16(AA); 0.48 (Aa); 0.36(aa)
- B. 0.16 (AA); 0.36(Aa); 0.48(aa)
- C. 0.36 (AA); 0.48 (Aa); 0.16 (aa)
- D. 0.16 (AA); 0.24 (Aa); 0.36 (aa)
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Q54
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements regarding mitochondria is incorrect?
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- A. Inner membrane is convoluted with infoldings
- B. Mitochondrial matrix contains single circular DNA molecule and ribosomes
- C. Outer membrane is permeable to monomers of carbohydrates, fats and proteins
- D. Enzymes of electron transport are embedded in outer membrane.
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Q55
BIOLOGY
Unit 7: Genetics and Evolution
Variations caused by mutation, as proposed by Hugo de Vries, are:
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- A. small and directional
- B. small and directionless
- C. random and directional
- D. random and directionless
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Q55
BIOLOGY
Unit 7: Genetics and Evolution
Variations caused by mutation, as proposed by Hugo de Vries, are :
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2019 (4 sets)
- A. small and directional
- B. small and directionless
- C. random and directional
- D. random and directionless
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Q56
BIOLOGY
Unit 9: Biotechnology and Its Applications
Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.
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- A. The enzyme cuts the sugar-phosphate backbone at specific sites on each strand
- B. The enzyme recognizes a specific palindromic nucleotide sequence in the DNA
- C. The enzyme cuts DNA molecule at identified position within the DNA
- D. The enzyme binds DNA at specific sites and cuts only one of the two strands
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Q57
BIOLOGY
Unit 5: Human Physiology
Which part of the brain is responsible for thermoregulation ?
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- A. Corpus callosum
- B. Medulla oblongata
- C. Cerebrum
- D. Hypothalamus
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Q58
BIOLOGY
Unit 5: Human Physiology
Use of an artificial kidney during hemodialysis may result in:
(a) Nitrogenous waste build-up in the body
(b) Non –elimination of excess potassium ions
(c) Reduced absorption of calcium ions from gastro-intestinal tract
(d) Reduced RBC production
Which of the following options is the most appropriate ?
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2019 (3 sets)
- A. (c) and (d) are correct
- B. (a) and (d) are correct
- C. (a) and (b) are correct
- D. (b) and (c) are correct
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Q59
BIOLOGY
Unit 9: Biotechnology and Its Applications
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm ?
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- A. Alkaline pH of gut
- B. Acidic pH of stomach
- C. Body temperature
- D. Moist surface of midgut
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Q60
BIOLOGY
Unit 10: Ecology and Environment
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
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- A. Gothenburg Protocol
- B. Geneva Protocol
- C. Montreal Protocol
- D. Kyoto Protocol
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Q61
BIOLOGY
Unit 6: Reproduction
Which of the following sexually transmitted diseases is not completely curable ?
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- A. Genital herpes
- B. Chlamydiasis
- C. Gonorrhoea
- D. Genital warts
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Q62
BIOLOGY
Unit 4: Plant Physiology
Thiobacillus is a group of bacteria helpful in carrying out :
- A. Nitrification
- B. Denitrification
- C. Nitrogen fixation
- D. Chemoautotrophic fixation
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Q63
BIOLOGY
Unit 7: Genetics and Evolution
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following :
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- A. Ratio of F2 is 1/4 (Red) : 2/4 (Pink) : 1/4 (White)
- B. Law of Segregation does not apply in this experiment
- C. This experiment does not follow the Principle of Dominance
- D. Pink colour in F1 is due to incomplete dominance
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Q64
BIOLOGY
Unit 7: Genetics and Evolution
In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5kg die. Which type of selection process is taking place ?
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- A. Disruptive Selection
- B. Cyclical Selection
- C. Directional Selection
- D. Stabilizing Selection
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Q91
PHYSICS
Unit 10: Oscillations and Waves
Average velocity of a particle executing SHM in one complete vibration is:
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- A. A²/2ω
- B. zero
- C. Aω/2
- D. Aω
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Q92
PHYSICS
Unit 16: Optics
Two similar thin equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F1. When the space between the two lenses is filled with glycerin (which has the same refractive index (µ = 1.5) as that of glass) then the equivalent focal length is F2. The ratio F1 : F2 will be:
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- A. 2 : 3
- B. 3 : 4
- C. 2 : 1
- D. 1 : 2
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Q93
PHYSICS
Unit 3: Laws of Motion
A particle moving with velocity V is acted by three forces shown by the vector triangle PQR. The velocity of the particle will:
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- A. remain constant
- B. change according to the smallest force
- C. increase
- D. decrease
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Q94
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
Ionized hydrogen atoms and α-particles with same momenta enter perpendicular to a constant magnetic field, B. The ratio of their radii of their paths rH : rα will be:
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- A. 4 : 1
- B. 1 : 4
- C. 2 : 1
- D. 1 : 2
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Q94
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
Ionized hydrogen atoms and α-particles with same momenta enter perpendicular to a constant magnetic field, B. The ratio of their radii of their paths rH : rα will be :
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 4 : 1
- B. 1 : 4
- C. 2 : 1
- D. 1 : 2
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Q95
PHYSICS
Unit 4: Work Energy and Power
Body A of mass 4m moving with speed u collides with another body B of mass 2m, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body A is:
↻ Repeated question — also appeared in
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- A. 4/9
- B. 5/9
- C. 1/9
- D. 8/9
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Q95
PHYSICS
Unit 4: Work Energy and Power
Body A of mass 4m moving with speed u collides with another body B of mass 2m, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body A is :
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 4/9
- B. 5/9
- C. 1/9
- D. 8/9
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Q96
PHYSICS
Unit 2: Kinematics
The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s and is flowing due east. If he is standing on the south bank and wishes to cross the river along the shortest path, the angle at which he should make his strokes w.r.t. north is given by :
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- A. 60º west
- B. 45º west
- C. 30º west
- D. 0º
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Q97
PHYSICS
Unit 12: Current Electricity
In the circuits shown below, the readings of the voltmeters and the ammeters will be :
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- A. V1 = V2 and i1 = i2
- B. V2 > V1 and i1 > i2
- C. V2 > V1 and i1 = i2
- D. V1 = V2 and i1 > i2
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Q98
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A 800 turn coil of effective area 0.05 m^2 is kept perpendicular to a magnetic field 5 × 10^-5 T. When the plane of the coil is rotated by 90º around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :
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2019 (1 set)
- A. 2 × 10^-3 V
- B. 0.02 V
- C. 2 V
- D. 0.2 V
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Q99
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
At a point A on the earth’s surface the angle of dip, δ = +25º. At a point B on the earth’s surface the angle of dip, δ = -25º. We can interpret that :
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- A. A is located in the northern hemisphere and B is located in the southern hemisphere
- B. A and B are both located in the southern hemisphere
- C. A and B are both located in the northern hemisphere
- D. A is located in the southern hemisphere and B is located in the northern hemisphere
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Q100
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, (nearly) : (me = 9 × 10^-31 kg)
↻ Repeated question — also appeared in
2019 (1 set)
- A. 12.2 × 10^-14 m
- B. 12.2 nm
- C. 12.2 × 10^-13 m
- D. 12.2 × 10^-12 m
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Q101
PHYSICS
Unit 10: Oscillations and Waves
The displacement of a particle executing simple harmonic motion is given by y = A0 + A sin(ωt) + B cos(ωt). Then the amplitude of its oscillation is given by :
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2019 (1 set)
- A. sqrt(A0^2 + (A+B)^2)
- B. A + B
- C. A0 + sqrt(A^2 + B^2)
- D. sqrt(A^2 + B^2)
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Q102
PHYSICS
Unit 18: Atoms and Nuclei
α-particle consists of :
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- A. 2 electrons and 4 protons only
- B. 2 protons only
- C. 2 protons and 2 neutrons only
- D. 2 electrons, 2 protons and 2 neutrons
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Q102
PHYSICS
Unit 18: Atoms and Nuclei
An α-particle consists of:
↻ Repeated question — also appeared in
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- A. 2 electrons and 4 protons only
- B. 2 protons only
- C. 2 protons and 2 neutrons only
- D. 2 electrons, 2 protons and 2 neutrons
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Q103
PHYSICS
Unit 11: Electrostatics
A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre :
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- A. zero as r increases for r < R, increases as r increases for r > R
- B. decreases as r increases for r < R and for r > R
- C. increases as r increases for r < R and for r > R
- D. zero as r increases for r < R, decreases as r increases for r > R
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Q103
PHYSICS
Unit 11: Electrostatics
A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre:
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2019 (2 sets)
- A. zero as r increases for r < R, increases as r increases for r > R
- B. decreases as r increases for r < R and for r > R
- C. increases as r increases for r < R and for r > R
- D. zero as r increases for r < R, decreases as r increases for r > R
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Q104
PHYSICS
Unit 1: Physics and Measurement
In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4% respectively. Then the maximum percentage of error in the measurement X, where X = (A^2 * B^(1/2)) / (C^(1/3) * D^3), will be:
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- A. –10%
- B. 10%
- C. (13/3)%
- D. 16%
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Q105
PHYSICS
Unit 4: Work Energy and Power
A force F = 20 + 10y acts on a particle in y-direction where F is in newton and y in meter. Work done by this force to move the particle from y = 0 to y = 1 m is:
↻ Repeated question — also appeared in
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- A. 25 J
- B. 20 J
- C. 30 J
- D. 5 J
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Q106
PHYSICS
Unit 8: Thermodynamics
In which of the following processes, heat is neither absorbed nor released by a system?
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- A. isobaric
- B. isochoric
- C. isothermal
- D. adiabatic
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Q107
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
In which of the following devices, the eddy current effect is not used?
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- A. electromagnet
- B. electric heater
- C. induction furnace
- D. magnetic braking in train
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Q108
PHYSICS
Unit 8: Thermodynamics
The unit of thermal conductivity is:
↻ Repeated question — also appeared in
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- A. W m K–1
- B. W m–1 K–1
- C. J m K–1
- D. J m–1 K–1
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Q109
PHYSICS
Unit 6: Gravitation
A body weighs 200 N on the surface of the earth. How much will it weigh half way down to the centre of the earth?
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- A. 250 N
- B. 100 N
- C. 150 N
- D. 200 N
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Q110
PHYSICS
Unit 11: Electrostatics
Two parallel infinite line charges with linear charge densities +λ C/m and –λ C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?
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- A. λ / (πε0R)
- B. λ / (2πε0R)
- C. zero
- D. λ / (2πε0R^2)
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Q111
PHYSICS
Unit 5: Rotational Motion
A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:
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- A. the mass is at the lowest point
- B. inclined at an angle of 60° from vertical
- C. the mass is at the highest point
- D. the wire is horizontal
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Q112
PHYSICS
Unit 19: Electronic Devices
The correct Boolean operation represented by the circuit diagram drawn is:
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- A. NAND
- B. NOR
- C. AND
- D. OR
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Q112
PHYSICS
Unit 19: Electronic Devices
The correct Boolean operation represented by the circuit diagram drawn is :
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- A. NAND
- B. NOR
- C. AND
- D. OR
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Q113
PHYSICS
Unit 3: Laws of Motion
A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be: (g = 10 m/s^2)
↻ Repeated question — also appeared in
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- A. 10 rad/s
- B. 10 π rad/s
- C. 10rad/s
- D. 10/2π rad/s
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Q113
PHYSICS
Unit 5: Rotational Motion
A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be : (g = 10 m/s^2)
↻ Repeated question — also appeared in
2019 (1 set)
- A. 10 rad/s
- B. 10 pi rad/s
- C. 10/pi rad/s
- D. sqrt(10)/pi rad/s
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Q114
PHYSICS
Unit 7: Properties of Solids and Liquids
A small hole of area of cross-section 2 mm^2 is present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m/s^2, the rate of flow of water through the open hole would be nearly :
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- A. 2.23 x 10^-6 m^3/s
- B. 6.4 x 10^-6 m^3/s
- C. 12.6 x 10^-6 m^3/s
- D. 8.9 x 10^-6 m^3/s
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Q115
PHYSICS
Unit 2: Kinematics
When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60° with horizontal, it can travel a distance x1 along the plane. But when the inclination is decreased to 30° and the same object is shot with the same velocity, it can travel x2 distance. Then x1 : x2 will be :
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- A. 3:1
- B. sqrt(3):1
- C. 2:1
- D. 1:2
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Q116
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field, B with the distance, d, from the centre of the conductor, is correctly represented by the figure :
↻ Repeated question — also appeared in
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- A. Plot with linear increase up to R and hyperbolic decrease after R
- B. Plot with jump at R
- C. Plot with constant inside and zero outside
- D. Plot with constant everywhere
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Q117
PHYSICS
Unit 7: Properties of Solids and Liquids
A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5×10^-2 N/m. The pressure inside the bubble equals at a point Z0 below the free surface of water in a container. Taking g = 10 m/s^2, density of water = 10^3 kg/m^3, the value of Z0 is :
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- A. 1 cm
- B. 0.5 cm
- C. 100 cm
- D. 10 cm
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Q118
PHYSICS
Unit 6: Gravitation
The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth, is :
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- A. 1/2 mgR
- B. 3/2 mgR
- C. mgR
- D. 2 mgR
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Q119
PHYSICS
Unit 12: Current Electricity
Which of the following acts as a circuit protection device ?
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- A. switch
- B. fuse
- C. conductor
- D. inductor
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Q120
PHYSICS
Unit 5: Rotational Motion
Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed vA and vB respectively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be :
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- A. rB : rA
- B. 1 : 1
- C. rA : rB
- D. vA : vB
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Q121
PHYSICS
Unit 12: Current Electricity
A parallel plate capacitor of capacitance 20 uF is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively :
↻ Repeated question — also appeared in
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- A. 60 uA, zero
- B. zero, zero
- C. zero, 60 uA
- D. 60 uA, 60 uA
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Q121
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A parallel plate capacitor of capacitance 20 μF is being charged by a voltage source whose potential is changing at the rate of 3 V/s. The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively :
↻ Repeated question — also appeared in
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- A. 60 μA, zero
- B. zero, zero
- C. zero, 60 μA
- D. 60 μA, 60 μA
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Q122
PHYSICS
Unit 10: Oscillations and Waves
The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the fig. y-projection of the radius vector of rotating particle P is :
↻ Repeated question — also appeared in
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- A. y(t) = 3 cos(3*pi/2 * t)
- B. y(t) = 3 cos(pi/2 * t)
- C. y(t) = -3 cos(2*pi * t)
- D. y(t) = 4 sin(pi/2 * t)
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Q122
PHYSICS
Unit 10: Oscillations and Waves
The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the fig. y-projection of the radius vector of rotating particle P is :
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2019 (3 sets)
- A. y(t) = 3 cos(π/2 t)
- B. y(t) = 3 cos(π/2 t)
- C. y(t) = -3 cos 2πt
- D. y(t) = 4 sin(π/2 t)
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Q123
PHYSICS
Unit 19: Electronic Devices
For a p-type semiconductor, which of the following statements is true?
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- A. Holes are the majority carriers and pentavalent atoms are the dopants
- B. Electrons are the majority carriers and pentavalent atoms are the dopants
- C. Electrons are the majority carriers and trivalent atoms are the dopants
- D. Holes are the majority carriers and trivalent atoms are the dopants
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Q124
PHYSICS
Unit 12: Current Electricity
Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be -
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- A. 1 : 2
- B. 2 : 1
- C. 4 : 9
- D. 9 : 4
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Q125
PHYSICS
Unit 9: Kinetic Theory of Gases
Increase in temperature of a gas filled in a container would lead to -
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- A. decrease in its pressure
- B. decrease in intermolecular distance
- C. increase in its mass
- D. increase in its kinetic energy
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Q126
PHYSICS
Unit 16: Optics
In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1 m away, was found to be 0.2°. What will be the angular width of the first minima if the entire experimental apparatus is immersed in water? (μwater = 4/3)
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- A. 0.05°
- B. 0.1°
- C. 0.266°
- D. 0.15°
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Q127
PHYSICS
Unit 18: Atoms and Nuclei
The total energy of an electron in an atom in an orbit is –3.4 eV. Its kinetic and potential energies are, respectively -
↻ Repeated question — also appeared in
2019 (1 set)
- A. 3.4 eV, – 6.8 eV
- B. 3.4 eV, 3.4 eV
- C. – 3.4 eV, – 3.4 eV
- D. – 3.4 eV, – 6.8 eV
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Q128
PHYSICS
Unit 16: Optics
Which colour of the light has the longest wavelength?
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- A. green
- B. violet
- C. red
- D. blue
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Q129
PHYSICS
Unit 16: Optics
In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?
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2019 (2 sets)
- A. equal to angle of incidence
- B. 90°
- C. 180°
- D. 0°
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Q129
PHYSICS
Unit 16: Optics
In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be the angle of refraction?
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2019 (2 sets)
- A. Equal to angle of incidence
- B. 90°
- C. 180°
- D. 0°
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Q130
PHYSICS
Unit 5: Rotational Motion
A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?
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2019 (2 sets)
- A. 2 J
- B. 1 J
- C. 3 J
- D. 30 kJ
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Q130
PHYSICS
Unit 5: Rotational Motion
A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 2 J
- B. 1 J
- C. 3 J
- D. 30 kJ
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Q131
PHYSICS
Unit 7: Properties of Solids and Liquids
When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + l). The elastic potential energy stored in the extended wire is -
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 1/2 Mgl
- B. 1/2 MgL
- C. Mgl
- D. MgL
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Q131
PHYSICS
Unit 7: Properties of Solids and Liquids
When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + l). The elastic potential energy stored in the extended wire is -
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 1/2 Mgl
- B. 1/2 MgL
- C. Mgl
- D. MgL
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Q132
PHYSICS
Unit 5: Rotational Motion
A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2π revolutions is-
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 12 × 10^-4 Nm
- B. 2 × 10^6 Nm
- C. 2 × 10^-6 Nm
- D. 2 × 10^-3 Nm
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Q133
PHYSICS
Unit 11: Electrostatics
Two point charges A and B, having charges +Q and –Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes-
↻ Repeated question — also appeared in
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- A. 16F/9
- B. 4F/3
- C. F
- D. 9F/16
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Q134
PHYSICS
Unit 16: Optics
Pick the wrong answer in the context with rainbow.
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- A. An observer can see a rainbow when his front is towards the sun
- B. Rainbow is a combined effect of dispersion, refraction and reflection of sunlight
- C. When the light rays undergo two internal reflections in a water drop, a secondary rainbow is formed
- D. The order of colours is reversed in the secondary rainbow
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Q135
PHYSICS
Unit 8: Thermodynamics
A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is (αCu = 1.7 × 10^-5 K^-1 and αAl = 2.2 × 10^-5 K^-1)
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- A. 88 cm
- B. 68 cm
- C. 6.8 cm
- D. 113.9 cm
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Q136
CHEMISTRY
Unit 4: Chemical Thermodynamics
In which case change in entropy is negative?
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- A. Sublimation of solid to gas
- B. 2H(g) → H2(g)
- C. Evaporation of water
- D. Expansion of a gas at temperature
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Q137
CHEMISTRY
Unit 8: Chemical Kinetics
For the chemical reaction N2(g) + 3H2(g) → 2NH3(g)
- A. -d[N2]/dt = 1/2 d[NH3]/dt
- B. 2/3 d[H2]/dt = 3/2 d[NH3]/dt
- C. -1/3 d[H2]/dt = -1/2 d[NH3]/dt
- D. -d[N2]/dt = 3/2 d[NH3]/dt
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Q138
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory?
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- A. C2
- B. Be2
- C. O2
- D. N2
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Q139
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is incorrect statement?
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- A. GeX4(X = F, Cl, Br, I) is more stable than GeX2
- B. SnF4 is ionic in nature
- C. PbF4 is covalent in nature
- D. SiCl4 is easily hydrolysed
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Q139
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is an incorrect statement?
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2019 (3 sets)
- A. GeX4(X = F, Cl, Br, I) is more stable than GeX2
- B. SnF4 is ionic in nature
- C. PbF4 is covalent in nature
- D. SiCl4 is easily hydrolysed
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Q140
CHEMISTRY
Unit 4: Chemical Thermodynamics
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is [Given that 1 L bar = 100 J]
↻ Repeated question — also appeared in
2019 (3 sets)
- A. 25 J
- B. 30 J
- C. -30 J
- D. 5 kJ
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Q140
CHEMISTRY
Unit 4: Chemical Thermodynamics
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is [Given that 1 L bar = 100 J]
↻ Repeated question — also appeared in
2019 (3 sets)
- A. 25 J
- B. 30 J
- C. -30 J
- D. 5 kJ
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Q141
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The compound that is most difficult to protonate is :
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- A. Dimethyl ether (CH3-O-CH3)
- B. Phenol (Ph-OH)
- C. Water (H-O-H)
- D. Methanol (H3C-O-H)
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Q142
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Which of the following is an amphoteric hydroxide?
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- A. Mg(OH)2
- B. Be(OH)2
- C. Sr(OH)2
- D. Ca(OH)2
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Q144
CHEMISTRY
Unit 19: Biomolecules
The biodegradable polymer is -
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- A. nylon-6
- B. Buna-S
- C. nylon-6, 6
- D. nylon 2-nylon 6
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Q146
CHEMISTRY
Unit 10: p-Block Elements
Match the following: (a) Pure nitrogen (i) Chlorine (b) Haber process (ii) Sulphuric acid (c) Contact process (iii) Ammonia (d) Deacon’s process (iv) Sodium azide or Barium azide. Which of the following is the correct option?
- A. (1) (iii) (iv) (ii) (i)
- B. (2) (iv) (iii) (ii) (i)
- C. (3) (i) (ii) (iii) (iv)
- D. (4) (ii) (iv) (i) (iii)
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Q147
CHEMISTRY
Unit 15: Hydrocarbons
The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is -
↻ Repeated question — also appeared in
2019 (1 set)
- A. 11 σ bonds and 2 π bonds
- B. 13 σ bonds and no π bond
- C. 10 σ bonds and 3 π bonds
- D. 8 σ bonds and 5 π bonds
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Q148
CHEMISTRY
Unit 12: Coordination Compounds
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is -
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- A. Ca
- B. Sr
- C. Be
- D. Mg
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Q149
CHEMISTRY
Unit 10: p-Block Elements
Identify the incorrect statement related to PCl5 from the following -
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- A. Axial P-Cl bonds are longer than equatorial P-Cl bonds
- B. PCl5 molecule is non-reactive
- C. Three equatorial P-Cl bonds make an angle of 120º with each other
- D. Two axial P-Cl bonds make an angle of 180º with each other
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Q150
CHEMISTRY
Unit 8: Chemical Kinetics
If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction is given by -
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- A. t = 4.606/k
- B. t = 2.303/k
- C. t = 0.693/k
- D. t = 6.909/k
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Q150
CHEMISTRY
Unit 8: Chemical Kinetics
If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction is given by -
↻ Repeated question — also appeared in
2019 (3 sets)
- A. t = 4.606/k
- B. t = 2.303/k
- C. t = 0.693/k
- D. t = 6.909/k
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Q151
CHEMISTRY
Unit 15: Hydrocarbons
The most suitable reagent for the conversion of 2-butyne to cis-2-butene is:
- A. Zn / HCl
- B. Hg2+ / H+, H2O
- C. Na / liquid NH3
- D. H2, Pd/C, quinoline
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Q151
CHEMISTRY
Unit 15: Hydrocarbons
The most suitable reagent for the following conversion, is : H3C–C≡C–CH3 -> cis-2-butene
- A. Zn / HCl
- B. Hg2+ / H+, H2O
- C. Na / liquid NH3
- D. H2, Pd/C, quinoline
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Q152
CHEMISTRY
Unit 11: d- and f-Block Elements
The manganate and permanganate ions are tetrahedral due to -
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- A. The π-bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese
- B. The π-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese
- C. The π-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
- D. There is no π-bonding
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Q152
CHEMISTRY
Unit 10: p-Block Elements
The manganate and permanganate ions are tetrahedral due to -
↻ Repeated question — also appeared in
2019 (1 set)
- A. The π-bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese
- B. The π-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese
- C. The π-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
- D. There is no π-bonding
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Q153
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For a cell involving one electron E°cell = 0.59 V at 298 K, the equilibrium constant for the cell reaction is : [Given that (RT/F) * 2.303 = 0.059 V at T = 298 K]
↻ Repeated question — also appeared in
2019 (1 set)
- A. 1.0 × 10^10
- B. 1.0 × 10^30
- C. 1.0 × 10^2
- D. 1.0 × 10^5
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Q154
CHEMISTRY
Unit 6: Equilibrium
pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is -
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 0.125 × 10^–15
- B. 0.5 × 10^–10
- C. 0.5 × 10^–15
- D. 0.25 × 10^–10
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Q155
CHEMISTRY
Unit 5: Solutions
For an ideal solution, the correct option is -
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- A. Δmix H = 0 at constant T and P
- B. Δmix G = 0 at constant T and P
- C. Δmix S = 0 at constant T and P
- D. Δmix V ≠ 0 at constant T and P
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Q156
PHYSICS
Unit 9: Kinetic Theory of Gases
A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is -
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Z < 1 and attractive forces are dominant
- B. Z < 1 and repulsive forces are dominant
- C. Z > 1 and attractive forces are dominant
- D. Z > 1 and repulsive forces are dominant
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Q157
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
The correct order of the basic strength of methyl substituted amines in aqueous solution is -
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- A. (CH3)3N > (CH3)2NH > CH3NH2
- B. CH3NH2 > (CH3)2NH > (CH3)3N
- C. (CH3)2NH > CH3NH2 > (CH3)3N
- D. (CH3)3N > CH3NH2 > (CH3)2NH
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Q158
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
For the second period elements the correct increasing order of first ionization enthalpy is -
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Li < B < Be < C < N < O < F < Ne
- B. Li < Be < B < C < O < N < F < Ne
- C. Li < Be < B < C < N < O < F < Ne
- D. Li < B < Be < C < O < N < F < Ne
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Q159
CHEMISTRY
Unit 8: Chemical Kinetics
Which mixture of the solution will lead to the formation of negatively charged colloidal [AgI]I-?
- A. 50 mL of 2 M AgNO3 + 50 mL of 1.5 M KI
- B. 50 mL of 0.1 M AgNO3 + 50 mL of 0.1 M KI
- C. 50 mL of 1 M AgNO3 + 50 mL of 1.5 M KI
- D. 50 mL of 1 M AgNO3 + 50 mL of 2 M KI
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Q160
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the cell reaction 2Fe3+(aq) + 2I–(aq) → 2Fe2+(aq) + I2(aq) E°cell = 0.24 V at 298 K. The standard Gibbs energy (ΔrG°) of the cell reaction is : [Given that Faraday constant F = 96500 C mol–1]
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 46.32 kJ mol–1
- B. 23.16 kJ mol–1
- C. –46.32 kJ mol–1
- D. –23.16 kJ mol–1
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Q160
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the cell reaction 2Fe3+(aq) + 2I-(aq) -> 2Fe2+(aq) + I2(aq), E°cell = 0.24 V at 298 K. The standard Gibbs energy (ΔrG°) of the cell reaction is: [Given that Faraday constant F = 96500 C mol-1]
↻ Repeated question — also appeared in
2019 (2 sets)
- A. 46.32 kJ mol-1
- B. 23.16 kJ mol-1
- C. -46.32 kJ mol-1
- D. -23.16 kJ mol-1
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Q161
CHEMISTRY
Unit 10: p-Block Elements
Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po)?
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- A. H2Po < H2Te < H2Se < H2S < H2O
- B. H2Se < H2Te < H2Po < H2O < H2S
- C. H2S < H2O < H2Se < H2Te < H2Po
- D. H2O < H2S < H2Se < H2Te < H2Po
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Q162
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is:
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- A. 30
- B. 40
- C. 10
- D. 20
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Q163
CHEMISTRY
Unit 2: Atomic Structure
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?
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- A. Paschen series
- B. Brackett series
- C. Lyman series
- D. Balmer series
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Q164
PHYSICS
Unit 7: Properties of Solids and Liquids
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is:
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- A. C3A4
- B. C4A3
- C. C2A3
- D. C3A2
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Q165
CHEMISTRY
Unit 19: Biomolecules
The non-essential amino acid among the following is:
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- A. alanine
- B. lysine
- C. valine
- D. leucine
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Q166
CHEMISTRY
Unit 15: Hydrocarbons
An alkene “A” on reaction with O3 and Zn + H2O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is:
↻ Repeated question — also appeared in
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- A. H3C – C(Cl)(CH3) – CH2 – CH3
- B. H3C – CH(Cl) – CH(CH3)2
- C. Cl – CH2 – CH2 – CH(CH3)2
- D. H3C – CH2 – CH(CH2Cl) – CH3
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Q167
CHEMISTRY
Unit 10: p-Block Elements
Which of the following species is not stable?
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- A. [Sn(OH)6]2-
- B. [SiCl6]2-
- C. [SiF6]2-
- D. [GeCl6]2-
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Q168
CHEMISTRY
Unit 10: p-Block Elements
Match the Xenon compounds in Column-I with its structure in column-II and assign the correct code: (a) XeF4 (i) pyramidal (b) XeF6 (ii) square planar (c) XeOF4 (iii) distorted octahedral (d) XeO3 (iv) square pyramidal
- A. (1) (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
- B. (2) (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- C. (3) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- D. (4) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
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Q170
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
Which of the following reactions are disproportionation reaction? (a) 2Cu+ -> Cu2+ + Cu0 (b) 3MnO42- + 4H+ -> 2MnO4- + MnO2 + 2H2O (c) 2KMnO4 -> K2MnO4 + MnO2 + O2 (d) MnO42- + 3Mn2+ + 2H2O -> 5MnO2 + 4H+
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- A. (1) (a), (c) and (d)
- B. (2) (a) and (d) only
- C. (3) (a) and (b) only
- D. (4) (a), (b) and (c)
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Q172
CHEMISTRY
Unit 5: Solutions
The mixture that forms maximum boiling azeotrope is :
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- A. Acetone + Carbon disulphide
- B. Heptane + Octane
- C. Water + Nitric acid
- D. Ethanol + Water
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Q173
CHEMISTRY
Unit 12: Coordination Compounds
What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory?
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- A. t2g3 eg3
- B. t2g4 eg2
- C. t2g2 eg4
- D. t2g6 eg0
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Q174
CHEMISTRY
Unit 6: Equilibrium
Conjugate base for Bronsted acids H2O and HF are :
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- A. OH- and F-, respectively
- B. H3O+ and H2F+, respectively
- C. OH- and H2F+, respectively
- D. H3O+ and F-, respectively
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Q175
CHEMISTRY
Unit 6: Equilibrium
Which will make basic buffer?
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- A. 100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH
- B. 100 mL of 0.1 M HCl + 100 mL of 0.1 M NH4OH
- C. 50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH3COOH
- D. 100 mL of 0.1 M CH3COOH + 100 mL of 0.1 M NaOH
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Q176
CHEMISTRY
Unit 2: Atomic Structure
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
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- A. 6p > 5f > 4d > 5p
- B. 5f > 6p > 4d > 5p
- C. 5f > 6p > 5p > 4d
- D. 6p > 5f > 5p > 4d
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Q179
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
The method used to remove temporary hardness of water is :
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- A. Ion-exchange method
- B. Synthetic resins method
- C. Calgon’s method
- D. clark’s method
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Q180
CHEMISTRY
Unit 11: d- and f-Block Elements
Which one is malachite from the following?
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- A. Fe3O4
- B. CuCO3·Cu(OH)2
- C. CuFeS2
- D. Cu(OH)2
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