Q1
BIOLOGY
Unit 7: Genetics and Evolution
Match the following genes of the Lac operon with their respective products:
(a) i gene (i) β-galactosidase
(b) z gene (ii) Permease
(c) a gene (iii) Repressor
(d) y gene (iv) Transacetylase
Select the correct option.
↻ Repeated question — also appeared in
2019 (2 sets)
- A. (1) (iii)(iv) (i)(ii)
- B. (2) (i) (iii) (ii)(iv)
- C. (3) (iii) (i) (ii)(iv)
- D. (4) (iii) (i)(iv)(ii)
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Q2
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 from the following:
↻ Repeated question — also appeared in
2019 (1 set)
- A. (1) (iii) (ii) (i) (iv)
- B. (2) (iii) (i) (ii) (iv)
- C. (3) (ii) (iv) (i) (iii)
- D. (4) (iii) (iv) (i) (ii)
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Q3
BIOLOGY
Unit 4: Plant Physiology
What is the direction of movement of sugars in phloem?
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2019 (2 sets)
- A. Bi-directional
- B. Non-multidirectional
- C. Upward
- D. Downward
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Q4
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Bronchioles and Fallopian tubes
- B. Bile duct and Bronchioles
- C. Fallopian tubes and Pancreatic duct
- D. Eustachian tube and Salivary duct
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Q5
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. Alien species invasion
- B. Habitat loss and fragmentation
- C. Drought and floods
- D. Economic exploitation
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Q6
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. Pills, Emergency contraceptives, Barrier methods.
- B. Lactational amenorrhea, Pills, Emergency contraceptives.
- C. Barrier method, Lactational amenorrhea, Pills.
- D. CuT, Pills, Emergency contraceptives.
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Q6
BIOLOGY
Unit 5: Human Physiology
Which of the following contraceptive methods do involve a role of hormone?
- A. Pills, Emergency contraceptives, Barrier methods.
- B. Lactational amenorrhea, Pills, Emergency contraceptives.
- C. Barrier method, Lactational amenorrhea, Pills.
- D. CuT, Pills, Emergency contraceptives.
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Q7
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. Nuclear envelope and Mitochondria
- B. Mitochondria and Lysosomes
- C. Chloroplast and Vacuoles
- D. Lysosomes and Vacuoles
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Q7
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. Nuclear envelope and Mitochondria
- B. Mitochondria and Lysosomes
- C. Chloroplast and Vacuoles
- D. Lysosomes and Vacuoles
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Q8
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 (2 sets)
- A. Free central
- B. Basal
- C. Axile
- D. Parietal
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Q9
BIOLOGY
Unit 10: Ecology and Environment
The Earth Summit held in Rio de Janeiro in 1992 was called
↻ Repeated question — also appeared in
2019 (3 sets)
- A. for immediate steps to discontinue use of CFCs that were damaging the ozone layer
- B. to reduce CO2 emissions and global warming
- C. for conservation of biodiversity and sustainable utilization of its benefits
- D. to assess threat posed to native species by invasive weed species
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Q10
BIOLOGY
Unit 7: Genetics and Evolution
Purines found both in DNA and RNA are
↻ Repeated question — also appeared in
2019 (1 set)
- A. Cytosine and thymine
- B. Adenine and thymine
- C. Adenine and guanine
- D. Guanine and cytosine
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Q11
BIOLOGY
Unit 5: Human Physiology
Match the following hormones with the respective disease: (a) Insulin (b) Thyroxin (c) Corticoids (d) Growth Hormone. Select the correct option.
↻ Repeated question — also appeared in
2019 (2 sets)
- A. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
- B. (a)-(v), (b)-(i), (c)-(ii), (d)-(iii)
- C. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
- D. (a)-(v), (b)-(iv), (c)-(i), (d)-(iii)
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Q12
BIOLOGY
Unit 3: Cell Structure and Function
The correct sequence of phases of cell cycle is
↻ Repeated question — also appeared in
2019 (3 sets)
- A. G1 -> S -> G2 -> M
- B. M -> G1 -> G2 -> S
- C. G1 -> G2 -> S -> M
- D. S -> G1 -> G2 -> M
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Q13
BIOLOGY
Unit 5: Human Physiology
Which of the following sexually transmitted diseases is not completely curable?
↻ Repeated question — also appeared in
2019 (1 set)
- A. Chlamydiasis
- B. Gonorrhoea
- C. Genital warts
- D. Genital herpes
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Q14
BIOLOGY
Unit 10: Ecology and Environment
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Making tubes and pipes
- B. Making plastic sacks
- C. Use as a fertilizer
- D. Construction of roads
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Q15
BIOLOGY
Unit 3: Cell Structure and Function
The shorter and longer arms of a submetacentric chromosome are referred to as
↻ Repeated question — also appeared in
2019 (4 sets)
- A. m-arm and n-arm respectively
- B. s-arm and l-arm respectively
- C. p-arm and q-arm respectively
- D. q-arm and p-arm respectively
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Q15
BIOLOGY
Unit 3: Cell Structure and Function
The shorter and longer arms of a submetacentric chromosome are referred to as
↻ Repeated question — also appeared in
2019 (4 sets)
- A. m-arm and n-arm respectively
- B. s-arm and l-arm respectively
- C. p-arm and q-arm respectively
- D. q-arm and p-arm respectively
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Q16
BIOLOGY
Unit 9: Biotechnology and Its Applications
Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.
↻ Repeated question — also appeared in
2019 (3 sets)
- A. The enzyme recognizes a specific palindromic nucleotide sequence in the DNA.
- B. The enzyme cuts DNA molecule at identified position within the DNA.
- C. The enzyme binds DNA at specific sites and cuts only one of the two strands.
- D. The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.
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Q16
BIOLOGY
Unit 9: Biotechnology and Its Applications
Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.
↻ Repeated question — also appeared in
2019 (3 sets)
- A. The enzyme recognizes a specific palindromic nucleotide sequence in the DNA.
- B. The enzyme cuts DNA molecule at identified position within the DNA.
- C. The enzyme binds DNA at specific sites and cuts only one of the two strands.
- D. The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.
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Q17
BIOLOGY
Unit 4: Plant Physiology
Persistent nucellus in the seed is known as
- A. Tegmen
- B. Chalaza
- C. Perisperm
- D. Hilum
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Q18
BIOLOGY
Unit 5: Human Physiology
Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes.
- A. Duodenal Cells
- B. Chief Cells
- C. Goblet Cells
- D. Oxyntic Cells
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Q19
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements is not correct?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Lysosomes are formed by the process of packaging in the endoplasmic reticulum
- B. Lysosomes have numerous hydrolytic enzymes
- C. The hydrolytic enzymes of lysosomes are active under acidic pH
- D. Lysosomes are membrane bound structures
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Q20
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
Select the correct option.
↻ Repeated question — also appeared in
2019 (1 set)
- A. (a)-(ii), (b)-(i), (c)-(iii), (d)-(v)
- B. (a)-(ii), (b)-(iv), (c)-(v), (d)-(iii)
- C. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(v)
- D. (a)-(iii), (b)-(iv), (c)-(v), (d)-(i)
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Q21
BIOLOGY
Unit 5: Human Physiology
Which part of the brain is responsible for thermoregulation?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Medulla oblongata
- B. Cerebrum
- C. Hypothalamus
- D. Corpus callosum
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Q22
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:
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Law of Segregation does not apply in this experiment
- B. This experiment does not follow the Principle of Dominance.
- C. Pink colour in F1 is due to incomplete dominance.
- D. Ratio of F2 is 1/4 (Red) : 2/4 (Pink) : 1/4 (White)
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Q23
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 (4 sets)
- A. Lactobacillus
- B. Trichoderma
- C. Chlorella
- D. Anabaena
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Q23
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 (4 sets)
- A. Lactobacillus
- B. Trichoderma
- C. Chlorella
- D. Anabaena
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Q24
BIOLOGY
Unit 8: Biology and Human Welfare
Select the correct group of biocontrol agents.
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Nostoc, Azospirillium, Nucleopolyhedrovirus
- B. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
- C. Trichoderma, Baculovirus, Bacillus thuringiensis
- D. Oscillatoria, Rhizobium, Trichoderma
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Q24
BIOLOGY
Unit 8: Biology and Human Welfare
Select the correct group of biocontrol agents.
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Nostoc, Azospirillium, Nucleopolyhedrovirus
- B. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
- C. Trichoderma, Baculovirus, Bacillus thuringiensis
- D. Oscillatoria, Rhizobium, Trichoderma
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Q25
BIOLOGY
Unit 7: Genetics and Evolution
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Sutton Boveri
- B. T.H. Morgan
- C. Gregor J. Mendel
- D. Alfred Sturtevant
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Q26
BIOLOGY
Unit 4: Plant Physiology
Respiratory Quotient (RQ) value of tripalmitin is
↻ Repeated question — also appeared in
2019 (3 sets)
- A. 0.09
- B. 0.9
- C. 0.7
- D. 0.07
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Q27
BIOLOGY
Unit 5: Human Physiology
What would be the heart rate of a person if the cardiac output is 5 L, 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. 125 beats per minute
- B. 50 beats per minute
- C. 75 beats per minute
- D. 100 beats per minute
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Q28
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
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Gymnosperms
- B. Liverworts
- C. Mosses
- D. Pteridophytes
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Q29
BIOLOGY
Unit 10: Ecology and Environment
Which of the following ecological pyramids is generally inverted?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Pyramid of biomass in a sea
- B. Pyramid of numbers in grassland
- C. Pyramid of energy
- D. Pyramid of biomass in a forest
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Q30
BIOLOGY
Unit 5: Human Physiology
Colostrum the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Immunoglobulin A
- B. Natural killer cells
- C. Monocytes
- D. Macrophages
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Q31
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Phloem in gymnosperms lacks :
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Both sieve tubes and companion cells
- B. Albuminous cells and sieve cells
- C. Sieve tubes only
- D. Companion cells only
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Q32
BIOLOGY
Unit 1: Diversity in Living World
Match the following organisms with their respective characteristics: (a) Pila, (b) Bombyx, (c) Pleurobrachia, (d) Taenia with (i) Flame cells, (ii) Comb plates, (iii) Radula, (iv) Malpighian tubules.
↻ Repeated question — also appeared in
2019 (2 sets)
- A. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
- B. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- C. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- D. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
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Q32
BIOLOGY
Unit 1: Diversity in Living World
Match the following organisms with their respective characteristics:
(a) Pila (i) Flame cells
(b) Bombyx (ii) Comb plates
(c) Pleurobrachia (iii) Radula
(d) Taenia (iv) Malpighian tubules
Select the correct option from the following:
- A. (1) (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
- B. (2) (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- C. (3) (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- D. (4) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
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Q33
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?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. (1) (a) and (d) are correct
- B. (2) (a) and (b) are correct
- C. (3) (b) and (c) are correct
- D. (4) (c) and (d) are correct
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Q34
BIOLOGY
Unit 5: Human Physiology
Which of the following statements is correct?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. (1) Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye.
- B. (2) Cornea is an external, transparent and protective proteinacious covering of the eye-ball.
- C. (3) Cornea consists of dense connective tissue of elastin and can repair itself.
- D. (4) Cornea is convex, transparent layer which is highly vascularised.
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Q35
BIOLOGY
Unit 7: Genetics and Evolution
Select the incorrect statement.
↻ Repeated question — also appeared in
2019 (3 sets)
- A. (1) Human males have one of their sex-chromosome much shorter than the other
- B. (2) Male fruit fly is heterogametic
- C. (3) In male grasshoppers 50% of sperms have no sex-chromosome
- D. (4) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg
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Q36
BIOLOGY
Unit 3: Cell Structure and Function
The concept of “Omnis cellula-e cellula” regarding cell division was first proposed by
↻ Repeated question — also appeared in
2019 (3 sets)
- A. (1) Aristotle
- B. (2) Rudolf Virchow
- C. (3) Theodore Schwann
- D. (4) Schleiden
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Q37
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. (1) Annual rings are not prominent in trees of temperate region.
- B. (2) Annual ring is a combination of spring wood and autumn wood produced in a year
- C. (3) Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.
- D. (4) Activity of cambium depends upon variation in climate.
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Q38
BIOLOGY
Unit 10: Ecology and Environment
Thiobacillus is a group of bacteria helpful in carrying out
↻ Repeated question — also appeared in
2019 (1 set)
- A. (1) Denitrification
- B. (2) Nitrogen fixation
- C. (3) Chemoautotrophic fixation
- D. (4) Nitrification
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Q39
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
↻ Repeated question — also appeared in
2019 (4 sets)
- A. (1) reduction in the secretion of surfactants by pneumocytes.
- B. (2) benign growth on mucous lining of nasal cavity
- C. (3) inflammation of bronchi and bronchioles
- D. (4) proliferation of fibrous tissues and damage of the alveolar walls
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Q39
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
↻ Repeated question — also appeared in
2019 (4 sets)
- A. reduction in the secretion of surfactants by pneumocytes.
- B. benign growth on mucous lining of nasal cavity
- C. inflammation of bronchi and bronchioles
- D. proliferation of fibrous tissues and damage of the alveolar walls
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Q40
BIOLOGY
Unit 6: Reproduction
In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as
↻ Repeated question — also appeared in
2019 (4 sets)
- A. (1) Parthenogenesis
- B. (2) Autogamy
- C. (3) Parthenocarpy
- D. (4) Syngamy
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Q40
BIOLOGY
Unit 6: Reproduction
In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Parthenogenesis
- B. Autogamy
- C. Parthenocarpy
- D. Syngamy
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Q41
BIOLOGY
Unit 5: Human Physiology
Select the correct option.
↻ Repeated question — also appeared in
2019 (1 set)
- A. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
- B. 8th, 9th and 10th pairs of ribs articulate directly with the sternum.
- C. 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.
- D. Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
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Q42
BIOLOGY
Unit 5: Human Physiology
How does steroid hormone influence the cellular activities?
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2019 (3 sets)
- A. Using aquaporin channels as second messenger
- B. Changing the permeability of the cell membrane
- C. Binding to DNA and forming a gene-hormone complex
- D. Activating cyclic AMP located on the cell membrane
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Q43
BIOLOGY
Unit 1: Diversity in Living World
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus
↻ Repeated question — also appeared in
2019 (3 sets)
- A. Mangifera Indica
- B. Mangifera indica Car. Linn.
- C. Mangifera indica Linn.
- D. Mangifera indica
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Q44
BIOLOGY
Unit 7: Genetics and Evolution
What map unit (Centimorgan) is adopted in the construction of genetic maps?
↻ Repeated question — also appeared in
2019 (3 sets)
- A. A unit of distance between genes on chromosomes, representing 50% cross over.
- B. A unit of distance between two expressed genes representing 10% cross over.
- C. A unit of distance between two expressed genes representing 100% cross over.
- D. A unit of distance between genes on chromosomes, representing 1% cross over.
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Q45
BIOLOGY
Unit 3: Cell Structure and Function
Cells in G0 phase :
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- A. terminate the cell cycle
- B. exit the cell cycle
- C. enter the cell cycle
- D. suspend the cell cycle
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Q46
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 (4 sets)
- A. Ovules develop into embryo sac
- B. Ovary develops into fruit
- C. Zygote develops into embryo
- D. Central cell develops into endosperm
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Q46
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 (4 sets)
- A. Ovules develop into embryo sac
- B. Ovary develops into fruit
- C. Zygote develops into embryo
- D. Central cell develops into endosperm
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Q47
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?
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2019 (2 sets)
- A. Genetic code is specific
- B. Genetic code is not ambiguous
- C. Genetic code is redundant
- D. Genetic code is nearly universal
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Q47
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?
↻ Repeated question — also appeared in
2019 (2 sets)
- A. Genetic code is specific
- B. Genetic code is not ambiguous
- C. Genetic code is redundant
- D. Genetic code is nearly universal
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Q48
BIOLOGY
Unit 5: Human Physiology
Which of the following glucose transporters is insulin-dependent?
- A. GLUT IV
- B. GLUT I
- C. GLUT II
- D. GLUT III
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Q48
BIOLOGY
Unit 5: Human Physiology
Which of the following glucose transporters is insulin-dependent?
- A. GLUT IV
- B. GLUT I
- C. GLUT II
- D. GLUT III
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Q49
BIOLOGY
Unit 7: Genetics and Evolution
Under which of the following conditions will there be no change in the reading frame of following mRNA? 5'AACAGCGGUGCUAUU3'
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2019 (3 sets)
- A. Deletion of GGU from 7th, 8th and 9th positions
- B. Insertion of G at 5th position
- C. Deletion of G from 5th position
- D. Insertion of A and G at 4th and 5th positions respectively
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Q50
BIOLOGY
Unit 5: Human Physiology
Select the hormone-releasing Intra-Uterine Devices.
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2019 (1 set)
- A. Lippes Loop, Multiload 375
- B. Vaults, LNG-20
- C. Multiload 375, Progestasert
- D. Progestasert, LNG-20
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Q51
BIOLOGY
Unit 7: Genetics and Evolution
Variations caused by mutation, as proposed by Hugo de Vries are
↻ Repeated question — also appeared in
2019 (3 sets)
- A. small and directionless
- B. random and directional
- C. random and directionless
- D. small and directional
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Q52
BIOLOGY
Unit 7: Genetics and Evolution
Expressed Sequence Tags (ESTs) refers to :
↻ Repeated question — also appeared in
2019 (1 set)
- A. Novel DNA sequences
- B. Genes expressed as RNA
- C. Polypeptide expression
- D. DNA polymorphism
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Q53
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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2019 (2 sets)
- A. Acidic pH of stomach
- B. Body temperature
- C. Moist surface of midgut
- D. Alkaline pH of gut
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Q54
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
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2019 (1 set)
- A. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- B. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- C. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- D. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
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Q55
BIOLOGY
Unit 10: Ecology and Environment
Which of the following pairs of gases is mainly responsible for green house effect?
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2019 (4 sets)
- A. Carbon dioxide and Methane
- B. Ozone and Ammonia
- C. Oxygen and Nitrogen
- D. Nitrogen and Sulphur dioxide
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Q55
BIOLOGY
Unit 10: Ecology and Environment
Which of the following pairs of gases is mainly responsible for green house effect?
↻ Repeated question — also appeared in
2019 (4 sets)
- A. Carbon dioxide and Methane
- B. Ozone and Ammonia
- C. Oxygen and Nitrogen
- D. Nitrogen and Sulphur dioxide
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Q56
BIOLOGY
Unit 1: Diversity in Living World
Match Column - I with Column - II:
Column - I: (a) Saprophyte, (b) Parasite, (c) Lichens, (d) Mycorrhiza
Column - II: (i) Symbiotic association of fungi with plant roots, (ii) Decomposition of dead organic materials, (iii) Living on living plants or animals, (iv) Symbiotic association of algae and fungi
- A. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- B. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- C. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- D. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
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Q56
BIOLOGY
Unit 1: Diversity in Living World
Match Column - I with Column - II:
Column - I: (a) Saprophyte, (b) Parasite, (c) Lichens, (d) Mycorrhiza
Column - II: (i) Symbiotic association of fungi with plant roots, (ii) Decomposition of dead organic materials, (iii) Living on living plants or animals, (iv) Symbiotic association of algae and fungi
- A. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- B. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- C. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- D. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
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Q57
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is true for Golden rice?
- A. It has yellow grains, because of a gene introduced from a primitive variety of rice
- B. It is Vitamin A enriched, with a gene from daffodil
- C. It is pest resistant, with a gene from Bacillus thuringiensis
- D. It is drought tolerant, developed using Agrobacterium vector
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Q58
BIOLOGY
Unit 7: Genetics and Evolution
What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile?
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2019 (3 sets)
- A. Down's syndrome
- B. Turner's syndrome
- C. Klinefelter's syndrome
- D. Edward syndrome
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Q59
BIOLOGY
Unit 6: Reproduction
Extrusion of second polar body from egg nucleus occurs :
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- A. simultaneously with first cleavage
- B. after entry of sperm but before fertilization
- C. after fertilization
- D. before entry of sperm into ovum
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Q60
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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2019 (3 sets)
- A. 0.16(AA); 0.36(Aa); 0.48(aa)
- B. 0.36(AA); 0.48(Aa); 0.16(aa)
- C. 0.16(AA); 0.24(Aa); 0.36(aa)
- D. 0.16(AA); 0.48(Aa); 0.36(aa)
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Q91
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:
- A. 1 : 2√3
- B. 1 : 2
- C. 2 : 1
- D. 1 : √3
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Q92
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 the pressure at a point Z0 below the free surface of water in a container. Taking g = 10 m/s², density of water = 10³ kg/m³, the value of Z0 is:
- A. 0.5 cm
- B. 100 cm
- C. 10 cm
- D. 1 cm
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Q93
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 glycerine (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:
- A. 3 : 4
- B. 2 : 1
- C. 1 : 2
- D. 2 : 3
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Q94
PHYSICS
Unit 18: Atoms and Nuclei
α-particle consists of:
- A. 2 protons only
- B. 2 protons and 2 neutrons only
- C. 2 electrons, 2 protons and 2 neutrons
- D. 2 electrons and 4 protons only
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Q95
PHYSICS
Unit 12: Current Electricity
Which of the following acts as a circuit protection device?
- A. Fuse
- B. Conductor
- C. Inductor
- D. Switch
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Q96
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?
- A. 90°
- B. 180°
- C. 0°
- D. Equal to angle of incidence
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Q97
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:
- A. 45° west
- B. 30° west
- C. 0°
- D. 60° west
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Q97
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:
- A. 45° west
- B. 30° west
- C. 0°
- D. 60° west
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Q98
PHYSICS
Unit 12: Current Electricity
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:
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- A. Zero, zero
- B. Zero, 60 μA
- C. 60 μA, 60 μA
- D. 60 μA, zero
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Q98
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. Zero, zero
- B. Zero, 60 μA
- C. 60 μA, 60 μA
- D. 60 μA, zero
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Q99
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:
- A. 3.4 eV, 3.4 eV
- B. –3.4 eV, –3.4 eV
- C. –3.4 eV, –6.8 eV
- D. 3.4 eV, –6.8 eV
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Q100
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:
- A. 10%
- B. 3/13%
- C. 16%
- D. – 10%
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Q101
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:
- A. Decreases as r increases for r < R and for r > R
- B. Increases as r increases for r < R and for r > R
- C. Zero as r increases for r < R, decreases as r increases for r > R
- D. Zero as r increases for r < R, increases as r increases for r > R
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Q102
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?
- A. λ / (πε_0 2R)
- B. Zero
- C. λ / (πε_0 2R^2)
- D. λ / (πε_0 R)
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Q103
PHYSICS
Unit 7: Properties of Solids and Liquids
The unit of thermal conductivity is:
- A. W m^–1 K^–1
- B. J m K^–1
- C. J m^–1 K^–1
- D. W m K^–1
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Q104
PHYSICS
Unit 10: Oscillations and Waves
The displacement of a particle executing simple harmonic motion is given by y = A_0 + A sin(ωt) + B cos(ωt). Then the amplitude of its oscillation is given by:
- A. A + B
- B. sqrt(A_0^2 + A^2 + B^2)
- C. sqrt(A^2 + B^2)
- D. sqrt(A_0^2 + (A + B)^2)
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Q105
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? (μ_water = 4/3)
- A. 0.1°
- B. 0.266°
- C. 0.15°
- D. 0.05°
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Q105
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? (μ_water = 4/3)
- A. 0.1°
- B. 0.266°
- C. 0.15°
- D. 0.05°
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Q106
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?
- A. 100 N
- B. 150 N
- C. 200 N
- D. 250 N
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Q106
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?
- A. 100 N
- B. 150 N
- C. 200 N
- D. 250 N
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Q107
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:
- A. Change according to the smallest force
- B. Increase
- C. Decrease
- D. Remain constant
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Q108
PHYSICS
Unit 5: Rotational Motion
Two particles A and B are moving in uniform circular motion in concentric circles of radii r_A and r_B with speed v_A and v_B respectively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be:
- A. 1 : 1
- B. r_A : r_B
- C. v_A : v_B
- D. r_B : r_A
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Q109
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 90° around any of its coplanar axis in 0.1 s, the emf induced in the coil will be:
- A. 0.02 V
- B. 2 V
- C. 0.2 V
- D. 2 × 10^–3 V
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Q110
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. 10π rad/s
- B. 10 rad/s
- C. 10/(2π) rad/s
- D. 10 rad/s
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Q111
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:
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- A. 1/2 MgL
- B. Mgl
- C. MgL
- D. 1/2 Mgl
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Q112
PHYSICS
Unit 9: Kinetic Theory of Gases
Increase in temperature of a gas filled in a container would lead to:
- A. Decrease in intermolecular distance
- B. Increase in its mass
- C. Increase in its kinetic energy
- D. Decrease in its pressure
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Q113
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:
- A. Graph showing B increasing linearly to R then staying constant
- B. Graph showing B increasing then falling to zero
- C. Graph showing B constant then increasing
- D. Graph showing B increasing linearly to R then falling hyperbolically
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Q114
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:
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2019 (1 set)
- A. 5/9
- B. 1/9
- C. 8/9
- D. 4/9
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Q114
PHYSICS
Unit 2: Kinematics
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 :
- A. 5/9
- B. 1/9
- C. 8/9
- D. 4/9
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Q115
PHYSICS
Unit 16: Optics
Which colour of the light has the longest wavelength?
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- A. Violet
- B. Red
- C. Blue
- D. Green
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Q115
PHYSICS
Unit 16: Optics
Which colour of the light has the longest wavelength?
- A. Violet
- B. Red
- C. Blue
- D. Green
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Q116
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: (α_Cu = 1.7 × 10^–5 K^–1 and α_Al = 2.2 × 10^–5 K^–1)
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- A. 68 cm
- B. 6.8 cm
- C. 113.9 cm
- D. 88 cm
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Q117
PHYSICS
Unit 19: Electronic Devices
For a p-type semiconductor, which of the following statements is true?
- A. Electrons are the majority carriers and pentavalent atoms are the dopants.
- B. Electrons are the majority carriers and trivalent atoms are the dopants.
- C. Holes are the majority carriers and trivalent atoms are the dopants.
- D. Holes are the majority carriers and pentavalent atoms are the dopants.
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Q118
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 (2 sets)
- A. y(t) = 3 cos(pi * t / 2)
- B. y(t) = -3 cos(2 * pi * t)
- C. y(t) = 4 sin(pi * t / 2)
- D. y(t) = 3 cos(3 * t / 2)
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Q119
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
- A. 20 J
- B. 30 J
- C. 5 J
- D. 25 J
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Q120
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. inclined at an angle of 60° from vertical
- B. the mass is at the highest point
- C. the wire is horizontal
- D. the mass is at the lowest point
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Q121
PHYSICS
Unit 10: Oscillations and Waves
Average velocity of a particle executing SHM in one complete vibration is:
- A. Zero
- B. omega * A / 2
- C. A * omega
- D. omega / 2 * A
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Q122
PHYSICS
Unit 16: Optics
Pick the wrong answer in the context with rainbow.
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- A. Rainbow is a combined effect of dispersion, refraction and reflection of sunlight
- B. When the light rays undergo two internal reflections in a water drop, a secondary rainbow is formed
- C. The order of colours is reversed in the secondary rainbow
- D. An observer can see a rainbow when his front is towards the sun
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Q123
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): (m_e = 9 × 10^-31 kg)
- A. 12.2 nm
- B. 12.2 × 10^-13 m
- C. 12.2 × 10^-12 m
- D. 12.2 × 10^-14 m
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Q123
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) (m_e = 9 × 10⁻³¹ kg):
- A. 12.2 nm
- B. 12.2 × 10⁻¹³ m
- C. 12.2 × 10⁻¹² m
- D. 12.2 × 10⁻¹⁴ m
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Q124
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?
- A. 1 J
- B. 3 J
- C. 30 kJ
- D. 2 J
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Q124
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?
- A. 1 J
- B. 3 J
- C. 30 kJ
- D. 2 J
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Q125
PHYSICS
Unit 19: Electronic Devices
The correct Boolean operation represented by the circuit diagram drawn is:
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- A. NOR
- B. AND
- C. OR
- D. NAND
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Q125
PHYSICS
Unit 19: Electronic Devices
The correct Boolean operation represented by the circuit diagram drawn is:
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- A. NOR
- B. AND
- C. OR
- D. NAND
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Q126
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 r_H : r_α will be:
- A. 1 : 4
- B. 2 : 1
- C. 1 : 2
- D. 4 : 1
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Q127
PHYSICS
Unit 11: Electrostatics
Two point charges A and B, having charges +Q and –Q respectively, are placed at a 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:
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- A. 4F/3
- B. F
- C. 9F/16
- D. 16F/9
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Q128
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. Electric heater
- B. Induction furnace
- C. Magnetic braking in train
- D. Electromagnet
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Q129
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
At a point A on the earth’s surface the angle of dip, δ = +25°. At a point B on the earth’s surface the angle of dip, δ = –25°. We can interpret that:
- A. A and B are both located in the southern hemisphere.
- B. A and B are both located in the northern hemisphere.
- C. A is located in the southern hemisphere and B is located in the northern hemisphere.
- D. A is located in the northern hemisphere and B is located in the southern hemisphere.
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Q130
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. 2 : 1
- B. 4 : 9
- C. 9 : 4
- D. 1 : 2
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Q131
PHYSICS
Unit 7: Properties of Solids and Liquids
A small hole of area of cross-section 2 mm² is present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m/s², the rate of flow of water through the open hole would be nearly:
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- A. 6.4 × 10⁻⁶ m³/s
- B. 12.6 × 10⁻⁶ m³/s
- C. 8.9 × 10⁻⁶ m³/s
- D. 2.23 × 10⁻⁶ m³/s
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Q132
PHYSICS
Unit 12: Current Electricity
In the circuits shown below, the readings of voltmeters and the ammeters will be (Circuit 1: Source 10V, Resistor 10Ω, Ammeter in series, Voltmeter in parallel across R; Circuit 2: Source 10V, Resistor 10Ω in series, Ammeter in series, Voltmeter in parallel across R):
- A. V2 > V1 and i1 > i2
- B. V2 > V1 and i1 = i2
- C. V1 = V2 and i1 > i2
- D. V1 = V2 and i1 = i2
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Q132
PHYSICS
Unit 12: Current Electricity
In the circuits shown below, the readings of voltmeters and the ammeters will be [Circuit 1: 10V source, 10 Ohm resistor, V1 voltmeter, A1 ammeter; Circuit 2: 10V source, 10 Ohm resistor, 10 Ohm resistor, V2 voltmeter, A2 ammeter]
- A. V2 > V1 and i1 > i2
- B. V2 > V1 and i1 = i2
- C. V1 = V2 and i1 > i2
- D. V1 = V2 and i1 = i2
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Q133
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:
- A. 3mgR/2
- B. mgR
- C. 2mgR
- D. mgR/2
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Q133
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:
- A. 3/2 mgR
- B. mgR
- C. 2mgR
- D. 1/2 mgR
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Q134
PHYSICS
Unit 8: Thermodynamics
In which of the following processes, heat is neither absorbed nor released by a system?
- A. Isochoric
- B. Isothermal
- C. Adiabatic
- D. Isobaric
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Q134
PHYSICS
Unit 8: Thermodynamics
In which of the following processes, heat is neither absorbed nor released by a system?
- A. Isochoric
- B. Isothermal
- C. Adiabatic
- D. Isobaric
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Q135
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
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- A. 2 × 10^6 N m
- B. 2 × 10^-6 N m
- C. 2 × 10^-3 N m
- D. 12 × 10^-4 N m
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Q136
CHEMISTRY
Unit 11: d- and f-Block Elements
Which one is malachite from the following?
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- A. CuCO3.Cu(OH)2
- B. CuFeS2
- C. Cu(OH)2
- D. Fe3O4
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Q137
CHEMISTRY
Unit 19: Biomolecules
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is :
- A. Sr
- B. Be
- C. Mg
- D. Ca
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Q138
CHEMISTRY
Unit 5: Solutions
For an ideal solution, the correct option is :
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- A. Δmix G = 0 at constant T and P
- B. Δmix S = 0 at constant T and P
- C. Δmix V ≠ 0 at constant T and P
- D. Δmix H = 0 at constant T and P
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Q139
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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2019 (2 sets)
- A. t2g^4 eg^2
- B. t2g^2 eg^4
- C. t2g^6 eg^0
- D. t2g^3 eg^3
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Q140
CHEMISTRY
Unit 15: Hydrocarbons
The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is
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- A. 13σ bonds and no π bonds
- B. 10σ bonds and 3π bonds
- C. 8σ bonds and 5π bonds
- D. 11σ bonds and 2π bonds
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Q141
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. C4A3
- B. C2A3
- C. C3A2
- D. C3A4
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Q142
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. 40
- B. 10
- C. 20
- D. 30
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Q143
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is incorrect statement?
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- A. SnF4 is ionic in nature
- B. PbF4 is covalent in nature
- C. SiCl4 is easily hydrolysed
- D. GeX4 (X = F, Cl, Br, I) is more stable than GeX2
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Q143
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is incorrect statement?
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- A. SnF4 is ionic in nature
- B. PbF4 is covalent in nature
- C. SiCl4 is easily hydrolysed
- D. GeX4 (X = F, Cl, Br, I) is more stable than GeX2
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Q144
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Which of the following is an amphoteric hydroxide?
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- A. Be(OH)2
- B. Sr(OH)2
- C. Ca(OH)2
- D. Mg(OH)2
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Q145
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 d-orbitals of oxygen with d-orbitals of manganese
- B. The π-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
- C. There is no π-bonding
- D. The π-bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese
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Q145
CHEMISTRY
Unit 12: Coordination Compounds
The manganate and permanganate ions are tetrahedral, due to :
- A. The pi-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese
- B. The pi-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese
- C. There is no pi-bonding
- D. The pi-bonding involves overlap of p-orbitals of oxygen with p-orbitals of manganese
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Q146
CHEMISTRY
Unit 6: Equilibrium
pH of a saturated solution of Ca(OH)2 is 9. The solubility product (Ksp) of Ca(OH)2 is:
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- A. 0.5 * 10^-10
- B. 0.5 * 10^-15
- C. 0.25 * 10^-10
- D. 0.125 * 10^-15
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Q147
CHEMISTRY
Unit 5: Solutions
The mixture that forms maximum boiling azeotrope is:
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- A. Heptane + Octane
- B. Water + Nitric acid
- C. Ethanol + Water
- D. Acetone + Carbon disulphide
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Q148
CHEMISTRY
Unit 10: p-Block Elements
Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code: Column-I: (a) XeF4, (b) XeF6, (c) XeOF4, (d) XeO3. Column-II: (i) Pyramidal, (ii) Square planar, (iii) Distorted octahedral, (iv) Square pyramidal.
- A. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- B. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- C. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- D. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
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Q149
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
Which of the following reactions are disproportionation reaction?
- A. (a) 2Cu+ -> Cu2+ + Cu, (b) 3MnO4^2- + 4H+ -> 2MnO4^- + MnO2 + 2H2O, (c) 2KMnO4 -> K2MnO4 + MnO2 + O2, (d) 2MnO4^- + 3Mn2+ + 2H2O -> 5MnO2 + 4H+
- B. (a) and (d) only
- C. (a) and (b) only
- D. (a), (b) and (c)
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Q150
CHEMISTRY
Unit 6: Equilibrium
Conjugate base for Bronsted acids H2O and HF are :
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- A. H3O+ and H2F+, respectively
- B. OH- and H2F+, respectively
- C. H3O+ and F-, respectively
- D. OH- and F-, respectively
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Q151
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Among the following, the reaction that proceeds through an electrophilic substitution, is:
- A. CH3OH + HCl -> CH3Cl + H2O
- B. C6H5N2+Cl- + N2 -> C6H5Cl + N2
- C. C6H6 + Cl2 --(AlCl3)--> C6H5Cl + HCl
- D. C6H6 + 3Cl2 --(UV)--> C6H6Cl6
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Q152
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:
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2019 (2 sets)
- A. H3C-CH(Cl)-CH(CH3)2
- B. Cl-CH2-CH2-CH(CH3)2
- C. H3C-CH2-CH(Cl)-CH2-CH3
- D. H3C-CH2-C(Cl)(CH3)2
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Q153
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 :
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2019 (3 sets)
- A. Z < 1 and repulsive forces are dominant
- B. Z > 1 and attractive forces are dominant
- C. Z > 1 and repulsive forces are dominant
- D. Z < 1 and attractive forces are dominant
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Q153
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 (3 sets)
- A. Z < 1 and repulsive forces are dominant
- B. Z > 1 and attractive forces are dominant
- C. Z > 1 and repulsive forces are dominant
- D. Z < 1 and attractive forces are dominant
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Q155
CHEMISTRY
Unit 4: Chemical Thermodynamics
In which case change in entropy is negative?
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- A. 2H(g) -> H2(g)
- B. Evaporation of water
- C. Expansion of a gas at constant temperature
- D. Sublimation of solid to gas
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Q156
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)
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- A. 30 J
- B. -30 J
- C. 5 kJ
- D. 25 J
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Q157
CHEMISTRY
Unit 10: p-Block Elements
Which of the following species is not stable?
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- A. [SiCl6]2-
- B. [SiF6]2-
- C. [GeCl6]2-
- D. [Sn(OH)6]2-
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Q158
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 2.303 RT/F = 0.059 V at 298 K)
↻ Repeated question — also appeared in
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- A. 1.0 x 10^30
- B. 1.0 x 10^2
- C. 1.0 x 10^5
- D. 1.0 x 10^10
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Q159
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
The method used to remove temporary hardness of water is :
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- A. Synthetic resins method
- B. Calgon's method
- C. Clark's method
- D. Ion-exchange method
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Q160
CHEMISTRY
Unit 6: Equilibrium
Which will make basic buffer?
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- A. 100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
- B. 50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH3COOH
- C. 100 mL of 0.1 M CH3COOH + 100 mL of 0.1 M NaOH
- D. 100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH
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Q161
CHEMISTRY
Unit 15: Hydrocarbons
The most suitable reagent for the following conversion, is : cis-2-butene to trans-2-butene?
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- A. Hg2+/H+, H2O
- B. Na/liquid NH3
- C. H2, Pd/C, quinoline
- D. Zn/HCl
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Q161
CHEMISTRY
Unit 15: Hydrocarbons
The most suitable reagent for the following conversion is: cis-2-butene to trans-2-butene (or specific isomerisation).
- A. Hg2+/H+, H2O
- B. Na/liquid NH3
- C. H2, Pd/C, quinoline
- D. Zn/HCl
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Q162
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The compound that is most difficult to protonate is :
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- A. Phenol
- B. Water
- C. Methanol
- D. Methoxybenzene
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Q162
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The compound that is most difficult to protonate is:
- A. Phenol (Ph-OH)
- B. H2O
- C. CH3OH
- D. CH3-O-CH3
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Q163
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. H2Se < H2Te < H2Po < H2O < H2S
- B. H2S < H2O < H2Se < H2Te < H2Po
- C. H2O < H2S < H2Se < H2Te < H2Po
- D. H2Po < H2Te < H2Se < H2S < H2O
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Q163
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. H2Se < H2Te < H2Po < H2O < H2S
- B. H2S < H2O < H2Se < H2Te < H2Po
- C. H2O < H2S < H2Se < H2Te < H2Po
- D. H2Po < H2Te < H2Se < H2S < H2O
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Q164
CHEMISTRY
Unit 10: p-Block Elements
The correct structure of tribromooctaoxide (Br3O8) is:
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- A. O=Br-Br-Br-O-O-O-O-O
- B. O=Br-Br(O)2-Br=O with oxygen linkages
- C. O=Br-Br-Br-O-O-O-O
- D. O-Br-Br-Br=O
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Q165
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The major product of the reaction between phthalic acid and ammonia upon strong heating is:
- A. Amide salt
- B. COOH, CONH2
- C. Phthalimide
- D. Amino acid derivative
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Q166
CHEMISTRY
Unit 10: p-Block Elements
Match the following: (a) Pure nitrogen, (b) Haber process, (c) Contact process, (d) Deacon’s process.
- A. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- B. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- C. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
- D. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
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Q167
CHEMISTRY
Unit 8: Chemical Kinetics
For the chemical reaction N2(g) + 3H2(g) -> 2NH3(g), the correct option relating rates is:
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- A. d[NH3]/dt = d[H2]/dt
- B. -(1/3)d[NH3]/dt = -(1/2)d[H2]/dt
- C. -(d[NH3]/dt) = d[N2]/dt
- D. -(1/2)d[NH3]/dt = d[N2]/dt
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Q168
CHEMISTRY
Unit 15: Hydrocarbons
The structure of intermediate A in the cumene oxidation reaction is:
- A. Peroxide linkage with cumene side chain
- B. Ether derivative
- C. Cumene hydroperoxide
- D. Dioxygenated aromatic
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Q169
CHEMISTRY
Unit 19: Biomolecules
The non-essential amino acid among the following is:
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- A. Lysine
- B. Valine
- C. Leucine
- D. Alanine
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Q170
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following diatomic molecular species has only pi bonds according to Molecular Orbital Theory?
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- A. Be2
- B. O2
- C. N2
- D. C2
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Q171
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. CH3NH2 > (CH3)2NH > (CH3)3N
- B. (CH3)2NH > CH3NH2 > (CH3)3N
- C. (CH3)3N > CH3NH2 > (CH3)2NH
- D. (CH3)3N > (CH3)2NH > CH3NH2
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Q172
CHEMISTRY
Unit 5: Solutions
Which mixture of the solutions will lead to the formation of negatively charged colloidal [AgI]I- sol?
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- A. 50 mL of 0.1 M AgNO3 + 50 mL of 0.1 M KI
- B. 50 mL of 1 M AgNO3 + 50 mL of 1.5 M KI
- C. 50 mL of 1 M AgNO3 + 50 mL of 2 M KI
- D. 50 mL of 2 M AgNO3 + 50 mL of 1.5 M KI
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Q173
CHEMISTRY
Unit 10: p-Block Elements
Identify the incorrect statement related to PCl5 from the following:
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- A. PCl5 molecule is non-reactive
- B. Three equatorial P–Cl bonds make an angle of 120° with each other
- C. Two axial P–Cl bonds make an angle of 180° with each other
- D. Axial P–Cl bonds are longer than equatorial P–Cl bonds
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Q174
CHEMISTRY
Unit 19: Biomolecules
Among the following, the narrow spectrum antibiotic is:
- A. Chloramphenicol
- B. Penicillin G
- C. Ampicillin
- D. Amoxycillin
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Q175
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 = 2.303/k
- B. t = 0.693/k
- C. t = 6.909/k
- D. t = 4.606/k
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Q176
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
For the second period elements the correct increasing order of first ionisation enthalpy is:
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- A. Li < Be < B < C < O < N < F < Ne
- B. Li < Be < B < C < N < O < F < Ne
- C. Li < B < Be < C < O < N < F < Ne
- D. Li < B < Be < C < N < O < F < Ne
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Q177
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. 5f > 6p > 4d > 5p
- B. 5f > 6p > 5p > 4d
- C. 6p > 5f > 5p > 4d
- D. 6p > 5f > 4d > 5p
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Q178
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the cell reaction 2Fe3+(aq) + 2I-(aq) → 2Fe2+(aq) + I2(s), Ecell = 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
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- A. 23.16 kJ mol–1
- B. – 46.32 kJ mol–1
- C. – 23.16 kJ mol–1
- D. 46.32 kJ mol–1
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Q180
CHEMISTRY
Unit 19: Biomolecules
The biodegradable polymer is:
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- A. Buna-S
- B. Nylon-6,6
- C. Nylon-2-Nylon 6
- D. Nylon-6
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