Q1
BIOLOGY
Unit 7: Genetics and Evolution
The final proof for DNA as the genetic material came from the experiments of
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Hargobind Khorana
- B. Griffith
- C. Hershey and Chase
- D. Avery, Mcleod and McCarty
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Q2
BIOLOGY
Unit 3: Cell Structure and Function
Spliceosomes are not found in cells of
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Bacteria
- B. Plants
- C. Fungi
- D. Animals
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Q3
BIOLOGY
Unit 5: Human Physiology
The pivot joint between atlas and axis is a type of
↻ Repeated question — also appeared in
2017 (1 set)
- A. Saddle joint
- B. Fibrous joint
- C. Cartilaginous joint
- D. Synovial joint
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Q4
BIOLOGY
Unit 3: Cell Structure and Function
The association of histone H1 with a nucleosome indicates:
↻ Repeated question — also appeared in
2017 (1 set)
- A. The DNA double helix is exposed
- B. Transcription is occurring
- C. DNA replication is occurring
- D. The DNA is condensed into a Chromatin Fibre
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Q5
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the following is made up of dead cells?
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2017 (3 sets)
- A. Phloem
- B. Xylem parenchyma
- C. Collenchyma
- D. Phellem
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Q5
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the following is made up of dead cells?
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2017 (3 sets)
- A. Phloem
- B. Xylem parenchyma
- C. Collenchyma
- D. Phellem
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Q6
BIOLOGY
Unit 6: Reproduction
Select the correct route for the passage of sperms in male frogs :
- A. Testes -> Vasa efferentia -> Kidney -> Bidder's canal -> Urinogenital duct -> Cloaca
- B. Testes -> Bidder's canal -> Kidney -> Vasa efferentia -> Urinogenital duct -> Cloaca
- C. Testes -> Vasa efferentia -> Kidney -> Seminal Vesicle -> Urinogenital duct -> Cloaca
- D. Testes -> Vasa efferentia -> Bidder's canal -> Ureter -> Cloaca
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Q6
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Select the correct route for the passage of sperms in male frogs:
↻ Repeated question — also appeared in
2017 (1 set)
- A. Testes -> Vasa efferentia -> Kidney -> Bidder's canal -> Urinogenital duct -> Cloaca
- B. Testes -> Bidder's canal -> Kidney -> Vasa efferentia -> Urinogenital duct -> Cloaca
- C. Testes -> Vasa efferentia -> Kidney -> Seminal Vesicle -> Urinogenital duct -> Cloaca
- D. Testes -> Vasa efferentia -> Bidder's canal -> Ureter -> Cloaca
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Q7
BIOLOGY
Unit 5: Human Physiology
Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?
(a) They do not need to reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen transport
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- A. (b) and (c)
- B. Only (d)
- C. Only (a)
- D. (a), (c) and (d)
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Q8
BIOLOGY
Unit 8: Biology and Human Welfare
Homozygous purelines in cattle can be obtained by
↻ Repeated question — also appeared in
2017 (1 set)
- A. Mating of individuals of different species
- B. Mating of related individuals of same breed
- C. Mating of unrelated individuals of same breed
- D. Mating of individuals of different breed
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Q9
BIOLOGY
Unit 5: Human Physiology
A temporary endocrine gland in the human body is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Corpus allatum
- B. Pineal gland
- C. Corpus cardiacum
- D. Corpus luteum
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Q10
BIOLOGY
Unit 1: Diversity in Living World
Viroids differ from viruses in having:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. RNA molecules without protein coat
- B. DNA molecules with protein coat
- C. DNA molecules without protein coat
- D. RNA molecules with protein coat
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Q11
BIOLOGY
Unit 5: Human Physiology
A decrease in blood pressure/volume will not cause the release of
↻ Repeated question — also appeared in
2017 (2 sets)
- A. ADH
- B. Renin
- C. Atrial Natriuretic Factor
- D. Aldosterone
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Q12
BIOLOGY
Unit 1: Diversity in Living World
An example of colonial alga is
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2017 (2 sets)
- A. Spirogyra
- B. Chlorella
- C. Volvox
- D. Ulothrix
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Q13
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The morphological nature of the edible part of coconut is
↻ Repeated question — also appeared in
2017 (1 set)
- A. Pericarp
- B. Perisperm
- C. Cotyledon
- D. Endosperm
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Q14
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is correctly matched for the product produced by them?
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2017 (1 set)
- A. Saccharomyces cerevisiae : Ethanol
- B. Acetobacter aceti : Antibiotics
- C. Methanobacterium : Lactic acid
- D. Penicillium notatum : Acetic acid
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Q15
BIOLOGY
Unit 5: Human Physiology
Match the following sexually transmitted diseases (Column - I) with their causative agent (Column - II) and select the correct option.
Column - I Column - II
(a) Gonorrhea (i) HIV
(b) Syphilis (ii) Neisseria
(c) Genital Warts (iii) Treponema
(d) AIDS (iv) Human Papilloma virus
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2017 (2 sets)
- A. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- B. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- C. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- D. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
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Q15
BIOLOGY
Unit 5: Human Physiology
Match the diseases in Column - I with their causative agent (Column - II) and select the correct option.
Column - I | Column - II
(a) Gonorrhea | (i) HIV
(b) Syphilis | (ii) Neisseria
(c) Genital Warts | (iii) Treponema
(d) AIDS | (iv) Human Papilloma virus
↻ Repeated question — also appeared in
2017 (2 sets)
- A. (1) (iv) (iii) (ii) (i)
- B. (2) (ii) (iii) (iv) (i)
- C. (3) (iii) (iv) (i) (ii)
- D. (4) (iv) (ii) (iii) (i)
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Q16
BIOLOGY
Unit 1: Diversity in Living World
In case of poriferans the spongocoel is lined with flagellated cells called:
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Mesenchymal cells
- B. Ostia
- C. Oscula
- D. Choanocytes
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Q16
BIOLOGY
Unit 1: Diversity in Living World
In case of poriferans the spongocoel is lined with flagellated cells called:
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Mesenchymal cells
- B. Ostia
- C. Oscula
- D. Choanocytes
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Q17
BIOLOGY
Unit 7: Genetics and Evolution
Among the following characters, which one was not considered by Mendel in his experiments on pea?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Pod - Inflated or Constricted
- B. Stem - Tall or Dwarf
- C. Trichomes - Glandular or non-glandular
- D. Seed - Green or Yellow
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Q17
BIOLOGY
Unit 7: Genetics and Evolution
Among the following characters, which one was not considered by Mendel in his experiments on pea?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Pod – Inflated or Constricted
- B. Stem – Tall or Dwarf
- C. Trichomes – Glandular or non-glandular
- D. Seed – Green or Yellow
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Q18
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the wrong statement in context of heartwood.
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2017 (2 sets)
- A. It comprises dead elements with highly lignified walls
- B. Organic compounds are deposited in it
- C. It is highly durable
- D. It conducts water and minerals efficiently
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Q19
BIOLOGY
Unit 3: Cell Structure and Function
During DNA replication, Okazaki fragments are used to elongate
↻ Repeated question — also appeared in
2017 (2 sets)
- A. The lagging strand away from the replication fork
- B. The leading strand towards replication fork
- C. The lagging strand towards replication fork
- D. The leading strand away from replication fork
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Q20
BIOLOGY
Unit 10: Ecology and Environment
Mycorrhizae are the example of
↻ Repeated question — also appeared in
2017 (1 set)
- A. Mutualism
- B. Fungistasis
- C. Amensalism
- D. Antibiosis
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Q21
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following RNAs should be most abundant in an animal cell?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. mi-RNA
- B. r-RNA
- C. t-RNA
- D. m-RNA
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Q22
BIOLOGY
Unit 9: Biotechnology and Its Applications
The process of separation and purification of expressed protein before marketing is called
↻ Repeated question — also appeared in
2017 (1 set)
- A. Postproduction processing
- B. Upstream processing
- C. Downstream processing
- D. Bioprocessing
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Q23
BIOLOGY
Unit 1: Diversity in Living World
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
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2017 (2 sets)
- A. Nostoc
- B. Bacillus
- C. Pseudomonas
- D. Mycoplasma
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Q24
BIOLOGY
Unit 1: Diversity in Living World
Which of the following components provides sticky character to the bacterial cell?
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2017 (1 set)
- A. Glycocalyx
- B. Cell wall
- C. Nuclear membrane
- D. Plasma membrane
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Q25
BIOLOGY
Unit 4: Plant Physiology
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Tomato is a greenhouse crop which can be grown in CO2 - enriched atmosphere for higher yield
- B. Light saturation for CO2 fixation occurs at 10% of full sunlight
- C. Increasing atmospheric CO2 concentration upto 0.05% can enhance CO2 fixation rate
- D. C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum
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Q25
BIOLOGY
Unit 4: Plant Physiology
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Tomato is a greenhouse crop which can be grown in CO2 - enriched atmosphere for higher yield
- B. Light saturation for CO2 fixation occurs at 10% of full sunlight
- C. Increasing atmospheric CO2 concentration upto 0.05% can enhance CO2 fixation rate
- D. C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum
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Q26
BIOLOGY
Unit 5: Human Physiology
Which of the following options best represents the enzyme composition of pancreatic juice?
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2017 (3 sets)
- A. Lipase, amylase, trypsinogen, procarboxypeptidase
- B. Amylase, peptidase, trypsinogen, rennin
- C. Amylase, pepsin, trypsinogen, maltase
- D. Peptidase, amylase, pepsin, rennin
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Q26
BIOLOGY
Unit 5: Human Physiology
Which of the following options best represents the enzyme composition of pancreatic juice?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Lipase, amylase, trypsinogen, procarboxypeptidase
- B. Amylase, peptidase, trypsinogen, rennin
- C. Amylase, pepsin, trypsinogen, maltase
- D. Peptidase, amylase, pepsin, rennin
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Q27
BIOLOGY
Unit 3: Cell Structure and Function
Which one of the following statements is correct, with reference to enzymes?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Holoenzyme = Coenzyme + Cofactor
- B. Apoenzyme = Holoenzyme + Coenzyme
- C. Holoenzyme = Apoenzyme + Coenzyme
- D. Coenzyme = Apoenzyme + Holoenzyme
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Q28
BIOLOGY
Unit 7: Genetics and Evolution
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
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2017 (2 sets)
- A. 333
- B. 1
- C. 11
- D. 33
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Q29
BIOLOGY
Unit 10: Ecology and Environment
Asymptote in a logistic growth curve is obtained when
↻ Repeated question — also appeared in
2017 (2 sets)
- A. K < N
- B. The value of 'r' approaches zero
- C. K = N
- D. K > N
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Q30
BIOLOGY
Unit 1: Diversity in Living World
Select the mismatch:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Equisetum – Homosporous
- B. Pinus – Dioecious
- C. Cycas – Dioecious
- D. Salvinia – Heterosporous
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Q31
BIOLOGY
Unit 3: Cell Structure and Function
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Recombination of chromosome arms will occur
- B. Chromosomes will not condense
- C. Chromosomes will be fragmented
- D. Chromosomes will not segregate
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Q32
BIOLOGY
Unit 10: Ecology and Environment
Which ecosystem has the maximum biomass?
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2017 (2 sets)
- A. Lake ecosystem
- B. Forest ecosystem
- C. Grassland ecosystem
- D. Pond ecosystem
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Q33
BIOLOGY
Unit 1: Diversity in Living World
Zygotic meiosis is characteristic of
↻ Repeated question — also appeared in
2017 (1 set)
- A. Chlamydomonas
- B. Marchantia
- C. Fucus
- D. Funaria
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Q34
BIOLOGY
Unit 5: Human Physiology
Hypersecretion of Growth Hormone in adults does not cause further increase in height, because
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Muscle fibres do not grow in size after birth
- B. Growth Hormone becomes inactive in adults
- C. Epiphyseal plates close after adolescence
- D. Bones loose their sensitivity to Growth Hormone in adults
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Q35
BIOLOGY
Unit 5: Human Physiology
Frog's heart when taken out of the body continues to beat for some time. Select the best option from the following statements: (a) Frog is a poikilotherm (b) Frog does not have any coronary circulation (c) Heart is "myogenic" in nature (d) Heart is autoexcitable
↻ Repeated question — also appeared in
2017 (3 sets)
- A. (c) & (d)
- B. Only (c)
- C. Only (d)
- D. (a) & (b)
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Q35
BIOLOGY
Unit 5: Human Physiology
Frog's heart when taken out of the body continues to beat for some time. Select the best option from the following statements: (a) Frog is a poikilotherm (b) Frog does not have any coronary circulation (c) Heart is "myogenic" in nature (d) Heart is autoexcitable
↻ Repeated question — also appeared in
2017 (3 sets)
- A. (c) & (d)
- B. Only (c)
- C. Only (d)
- D. (a) & (b)
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Q36
BIOLOGY
Unit 5: Human Physiology
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Physiological immune response
- B. Autoimmune response
- C. Cell-mediated immune response
- D. Hormonal immune response
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Q37
BIOLOGY
Unit 7: Genetics and Evolution
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
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2017 (2 sets)
- A. Sickle cell anemia is due to a quantitative problem of globin molecules
- B. Both are due to a qualitative defect in globin chain synthesis
- C. Both are due to a quantitative defect in globin chain synthesis
- D. Thalassemia is due to less synthesis of globin molecules
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Q38
BIOLOGY
Unit 1: Diversity in Living World
An important characteristic that Hemichordates share with Chordates is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Pharynx without gill slits
- B. Absence of notochord
- C. Ventral tubular nerve cord
- D. Pharynx with gill slits
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Q39
BIOLOGY
Unit 6: Reproduction
Double fertilization is exhibited by
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Angiosperms
- B. Gymnosperms
- C. Algae
- D. Fungi
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Q40
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
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2017 (2 sets)
- A. Mitochondrion
- B. Lysosome
- C. Ribosome
- D. Chloroplast
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Q41
BIOLOGY
Unit 5: Human Physiology
Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of :
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2017 (2 sets)
- A. Expiratory Reserve Volume
- B. Residual Volume
- C. Inspiratory Reserve Volume
- D. Tidal Volume
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Q42
CHEMISTRY
Unit 19: Biomolecules
Which of the following are not polymeric?
↻ Repeated question — also appeared in
2017 (1 set)
- A. Lipids
- B. Nucleic acids
- C. Proteins
- D. Polysaccharides
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Q43
BIOLOGY
Unit 6: Reproduction
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
↻ Repeated question — also appeared in
2017 (1 set)
- A. Bat
- B. Water
- C. Bee
- D. Wind
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Q44
BIOLOGY
Unit 1: Diversity in Living World
Life cycle of Ectocarpus and Fucus respectively are
↻ Repeated question — also appeared in
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- A. Haplodiplontic, Haplontic
- B. Haplontic, Diplontic
- C. Diplontic, Haplodiplontic
- D. Haplodiplontic, Diplontic
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Q45
BIOLOGY
Unit 10: Ecology and Environment
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :
↻ Repeated question — also appeared in
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- A. Temperate Forest
- B. Tropical Savannah
- C. Tropical Rain Forest
- D. Grassland
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Q45
BIOLOGY
Unit 10: Ecology and Environment
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Temperate Forest
- B. Tropical Savannah
- C. Tropical Rain Forest
- D. Grassland
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Q46
BIOLOGY
Unit 4: Plant Physiology
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in :
↻ Repeated question — also appeared in
2017 (3 sets)
- A. C3 and C4 plants
- B. C3 plants
- C. C4 plants
- D. C2 plants
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Q46
BIOLOGY
Unit 4: Plant Physiology
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in :
↻ Repeated question — also appeared in
2017 (3 sets)
- A. C3 and C4 plants
- B. C3 plants
- C. C4 plants
- D. C2 plants
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Q47
BIOLOGY
Unit 5: Human Physiology
Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements: (a) Vitamin A derivatives are formed from carotene (b) The photopigments are embedded in the membrane discs of the inner segment (c) Retinal is a derivative of vitamin A (d) Retinal is a light absorbing part of all the visual photopigments
↻ Repeated question — also appeared in
2017 (2 sets)
- A. (b), (c) & (d)
- B. (a) & (b)
- C. (a), (c) & (d)
- D. (a) & (c)
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Q48
BIOLOGY
Unit 7: Genetics and Evolution
Which one from those given below is the period for Mendel's hybridization experiments?
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2017 (2 sets)
- A. 1870 - 1877
- B. 1856 - 1863
- C. 1840 - 1850
- D. 1857 - 1869
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Q49
BIOLOGY
Unit 8: Biology and Human Welfare
Select the mismatch :
↻ Repeated question — also appeared in
2017 (1 set)
- A. Rhizobium – Alfalfa
- B. Frankia – Alnus
- C. Rhodospirillum – Mycorrhiza
- D. Anabaena – Nitrogen fixer
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Q50
BIOLOGY
Unit 6: Reproduction
Attractants and rewards are required for
↻ Repeated question — also appeared in
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- A. Cleistogamy
- B. Anemophily
- C. Entomophily
- D. Hydrophily
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Q51
BIOLOGY
Unit 6: Reproduction
In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Intracytoplasmic sperm injection
- B. Intrauterine transfer
- C. Gamete intracytoplasmic fallopian transfer
- D. Artificial Insemination
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Q52
BIOLOGY
Unit 1: Diversity in Living World
Which among these is the correct combination of aquatic mammals?
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2017 (2 sets)
- A. Trygon, Whales, Seals
- B. Seals, Dolphins, Sharks
- C. Dolphins, Seals, Trygon
- D. Whales, Dolphins, Seals
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Q53
BIOLOGY
Unit 6: Reproduction
Functional megaspore in an angiosperm develops into
↻ Repeated question — also appeared in
2017 (1 set)
- A. Embryo
- B. Ovule
- C. Endosperm
- D. Embryo sac
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Q54
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Root hairs develop from the region of
↻ Repeated question — also appeared in
2017 (1 set)
- A. Meristematic activity
- B. Maturation
- C. Elongation
- D. Root cap
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Q55
BIOLOGY
Unit 6: Reproduction
A dioecious flowering plant prevents both:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Cleistogamy and xenogamy
- B. Autogamy and xenogamy
- C. Autogamy and geitonogamy
- D. Geitonogamy and xenogamy
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Q56
BIOLOGY
Unit 5: Human Physiology
The hepatic portal vein drains blood to liver from
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Intestine
- B. Heart
- C. Stomach
- D. Kidneys
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Q56
BIOLOGY
Unit 5: Human Physiology
The hepatic portal vein drains blood to liver from
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Intestine
- B. Heart
- C. Stomach
- D. Kidneys
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Q57
BIOLOGY
Unit 9: Biotechnology and Its Applications
What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Negatively charged fragments do not move
- B. The larger the fragment size, the farther it moves
- C. The smaller the fragment size, the farther it moves
- D. Positively charged fragments move to farther end
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Q57
BIOLOGY
Unit 9: Biotechnology and Its Applications
What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Negatively charged fragments do not move
- B. The larger the fragment size, the farther it moves
- C. The smaller the fragment size, the farther it moves
- D. Positively charged fragments move to farther end
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Q58
BIOLOGY
Unit 1: Diversity in Living World
Which of the following represents order of 'Horse'?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Ferus
- B. Equidae
- C. Perissodactyla
- D. Caballus
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Q58
BIOLOGY
Unit 1: Diversity in Living World
Which of the following represents the order of 'Horse'?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Ferus
- B. Equidae
- C. Perissodactyla
- D. Caballus
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Q59
BIOLOGY
Unit 4: Plant Physiology
Which statement is wrong for Krebs' cycle?
↻ Repeated question — also appeared in
2017 (1 set)
- A. The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
- B. There are three points in the cycle where NAD+ is reduced to NADH + H+
- C. There is one point in the cycle where FAD+ is reduced to FADH2
- D. During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised
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Q60
BIOLOGY
Unit 7: Genetics and Evolution
Artificial selection to obtain cows yielding higher milk output represents
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows
- B. Stabilizing selection as it stabilizes this character in the population
- C. Directional as it pushes the mean of the character in one direction
- D. Disruptive as it splits the population into two one yielding higher output and the other lower output
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Q61
BIOLOGY
Unit 10: Ecology and Environment
The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Restoration zone
- B. Core zone
- C. Buffer zone
- D. Transition zone
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Q62
BIOLOGY
Unit 5: Human Physiology
Receptor sites for neurotransmitters are present on
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Post-synaptic membrane
- B. Membranes of synaptic vesicles
- C. Pre-synaptic membrane
- D. Tips of axons
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Q63
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The vascular cambium normally gives rise to
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Periderm
- B. Phelloderm
- C. Primary phloem
- D. Secondary xylem
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Q64
BIOLOGY
Unit 5: Human Physiology
A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Molars
- B. Incisors
- C. Canines
- D. Pre-molars
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Q91
PHYSICS
Unit 10: Oscillations and Waves
A spring of force constant k is cut into lengths of ratio 1 : 2 : 3. They are connected in series and the new force constant is k'. Then they are connected in parallel and force constant is k''. Then k' : k'' is
↻ Repeated question — also appeared in
2017 (1 set)
- A. 1 : 14
- B. 1 : 6
- C. 1 : 9
- D. 1 : 11
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Q92
PHYSICS
Unit 8: Thermodynamics
Thermodynamic processes are indicated in the diagram. Match the following:
Process I, II, III, IV to a. Adiabatic, b. Isobaric, c. Isochoric, d. Isothermal
- A. P -> d, Q -> b, R -> a, S -> c
- B. P -> a, Q -> c, R -> d, S -> b
- C. P -> c, Q -> a, R -> d, S -> b
- D. P -> c, Q -> d, R -> b, S -> a
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Q93
PHYSICS
Unit 11: Electrostatics
A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Increases by a factor of 2
- B. Increases by a factor of 4
- C. Decreases by a factor of 2
- D. Remains the same
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Q94
PHYSICS
Unit 7: Properties of Solids and Liquids
A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level. The density of the oil is
- A. 928 kg m^-3
- B. 650 kg m^-3
- C. 425 kg m^-3
- D. 800 kg m^-3
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Q95
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is
- A. h / sqrt(mkT)
- B. h / (mkT)
- C. h / sqrt(3mkT)
- D. 2/3 * h / sqrt(mkT)
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Q95
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is
- A. h / sqrt(2mkT)
- B. h / sqrt(mkT)
- C. h / sqrt(3mkT)
- D. h / sqrt(2/3 * mkT)
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Q96
PHYSICS
Unit 6: Gravitation
The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then
↻ Repeated question — also appeared in
2017 (3 sets)
- A. d = 2 km
- B. d = 1/2 km
- C. d = 1 km
- D. d = 3/2 km
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Q96
PHYSICS
Unit 6: Gravitation
The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then
↻ Repeated question — also appeared in
2017 (3 sets)
- A. d = 2 km
- B. d = 1/2 km
- C. d = 1 km
- D. d = 3/2 km
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Q97
PHYSICS
Unit 2: Kinematics
The x and y coordinates of the particle at any time are x = 5t – 2t^2 and y = 10t respectively, where x and y are in meters and t in seconds. The acceleration of the particle at t = 2 s is
- A. -8 m/s^2
- C. 5 m/s^2
- D. -4 m/s^2
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Q98
PHYSICS
Unit 19: Electronic Devices
In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 20 and 2000
- B. 200 and 1000
- C. 15 and 200
- D. 150 and 15000
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Q100
PHYSICS
Unit 6: Gravitation
Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Will become stationary
- B. Keep floating at the same distance between them
- C. Move towards each other
- D. Move away from each other
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Q101
PHYSICS
Unit 8: Thermodynamics
A Carnot engine having an efficiency of 1/10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 100 J
- B. 1 J
- C. 90 J
- D. 99 J
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Q102
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A 250-Turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 μA and subjected to a magnetic field of strength 0.85 T. Work done for rotating the coil by 180° against the torque is
- A. 1.15 μJ
- B. 9.1 μJ
- C. 4.55 μJ
- D. 2.3 μJ
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Q103
PHYSICS
Unit 19: Electronic Devices
Which one of the following represents forward bias diode?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 5 V | 3 V (R)
- B. -2 V | 0 V (R)
- C. -3 V | -4 V (R)
- D. +2 V | -2 V (R)
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Q104
PHYSICS
Unit 18: Atoms and Nuclei
The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is
- A. 0.5
- B. 2
- C. 1
- D. 4
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Q105
PHYSICS
Unit 12: Current Electricity
Figure shows a circuit contains three identical resistors with resistance R = 9.0 Ω each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf ε = 18 V. The current 'i' through the battery just after the switch is closed is:
- A. 0 ampere
- B. 2 mA
- C. 0.2 A
- D. 2 A
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Q106
PHYSICS
Unit 3: Laws of Motion
Two blocks A and B of masses 3m and m respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively
↻ Repeated question — also appeared in
2017 (3 sets)
- A. g/3, g/3
- B. g, g/3
- C. g/3, g
- D. g, g
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Q106
PHYSICS
Unit 3: Laws of Motion
Two blocks A and B of masses 3m and m respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively:
↻ Repeated question — also appeared in
2017 (3 sets)
- A. g/3, g/3
- B. g, g/3
- C. g/3, g
- D. g, g
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Q107
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A long solenoid of diameter 0.1 m has 2 × 10^4 turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is 10π^2 Ω, the total charge flowing through the coil during this time is:
- A. 16π μC
- B. 32 π μC
- C. 16 μC
- D. 32 μC
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Q108
PHYSICS
Unit 1: Physics and Measurement
A physical quantity of the dimensions of length that can be formed out of c, G and e^2/(4πε₀) is [c is velocity of light, G is universal constant of gravitation and e is charge].
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 1/c^2 * [e^2/(4πε₀G)]^(1/2)
- B. [e^2/(4πε₀Gc^2)]^(1/2)
- C. [e^2/(4πε₀cG)]^(1/2)
- D. [e^2/(4πε₀Gc)]^(1/2)
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Q109
PHYSICS
Unit 15: Electromagnetic Waves
In an electromagnetic wave in free space the root mean square value of the electric field is E_rms = 6 V/m. The peak value of the magnetic field is:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 4.23 × 10^-8 T
- B. 1.41 × 10^-8 T
- C. 2.83 × 10^-8 T
- D. 0.70 × 10^-8 T
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Q110
PHYSICS
Unit 12: Current Electricity
The resistance of a wire is ‘R’ ohm. If it is melted and stretched to ‘n’ times its original length, its new resistance will be:
↻ Repeated question — also appeared in
2017 (1 set)
- A. R/n^2
- B. nR
- C. R/n
- D. n^2R
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Q111
PHYSICS
Unit 16: Optics
The ratio of resolving powers of an optical microscope for two wavelengths λ1 = 4000 Å and λ2 = 6000 Å is:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 16 : 81
- B. 8 : 27
- C. 9 : 4
- D. 3 : 2
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Q112
PHYSICS
Unit 16: Optics
A thin prism having refracting angle 10° is made of glass of refractive index 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 10°
- B. 4°
- C. 6°
- D. 8°
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Q113
PHYSICS
Unit 16: Optics
Two Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45º with that of P1. The intensity of transmitted light through P2 is:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. I0 / 16
- B. I0 / 2
- C. I0 / 4
- D. I0 / 8
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Q114
PHYSICS
Unit 12: Current Electricity
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves:
- A. A combination of cells, galvanometer and resistances
- B. Cells
- C. Potential gradients
- D. A condition of no current flow through the galvanometer
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Q114
PHYSICS
Unit 12: Current Electricity
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves:
- A. A combination of cells, galvanometer and resistances
- B. Cells
- C. Potential gradients
- D. A condition of no current flow through the galvanometer
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Q115
PHYSICS
Unit 10: Oscillations and Waves
The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 40 Hz
- B. 10 Hz
- C. 20 Hz
- D. 30 Hz
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Q115
PHYSICS
Unit 10: Oscillations and Waves
The two nearest harmonics of a tube closed at one end and open at the other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 40 Hz
- B. 10 Hz
- C. 20 Hz
- D. 30 Hz
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Q116
PHYSICS
Unit 16: Optics
A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle θ, the spot of the light is found to move through a distance y on the scale. The angle θ is given by:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. x/y
- B. y/2x
- C. y/x
- D. x/2y
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Q118
PHYSICS
Unit 10: Oscillations and Waves
A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is:
↻ Repeated question — also appeared in
2017 (1 set)
- A. 2π/3
- B. π/5
- C. 2π/5
- D. 4π/5
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Q119
PHYSICS
Unit 2: Kinematics
Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time t1. On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time t2. The time taken by her to walk up on the moving escalator will be:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. t1 - t2
- B. (t1 + t2)/2
- C. (t1 - t2)/(t1 * t2)
- D. (t1 * t2)/(t1 + t2)
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Q120
PHYSICS
Unit 5: Rotational Motion
Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities ω1 and ω2. They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. I(ω1-ω2)²/8
- B. I(ω1+ω2)²/2
- C. I(ω1-ω2)²/4
- D. I(ω1 - ω2)²
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Q121
PHYSICS
Unit 8: Thermodynamics
A gas mixture consists of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is:
↻ Repeated question — also appeared in
2017 (1 set)
- A. 11 RT
- B. 4 RT
- C. 15 RT
- D. 9 RT
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Q122
PHYSICS
Unit 7: Properties of Solids and Liquids
The bulk modulus of a spherical object is ‘B’. If it is subjected to uniform pressure ‘p’, the fractional decrease in radius is:
↻ Repeated question — also appeared in
2017 (2 sets)
- A. p/(3B)
- B. p/B
- C. 3B/p
- D. 3p/B
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Q123
PHYSICS
Unit 3: Laws of Motion
One end of a string of length l is connected to a particle of mass ‘m’ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in a circle with speed ‘v’, the net force on the particle (directed towards center) will be:
↻ Repeated question — also appeared in
2017 (1 set)
- A. Zero
- B. T
- C. mv²/l + T
- D. mv²/l - T
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Q124
PHYSICS
Unit 5: Rotational Motion
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. 5 m/s²
- B. 25 m/s²
- C. 0.25 rad/s²
- D. 25 rad/s²
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Q124
PHYSICS
Unit 5: Rotational Motion
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. 5 m/s²
- B. 25 m/s²
- C. 0.25 rad/s²
- D. 25 rad/s²
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Q125
PHYSICS
Unit 16: Optics
Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly
- A. 1.78
- B. 1.25
- C. 1.59
- D. 1.69
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Q126
PHYSICS
Unit 11: Electrostatics
Suppose the charge of a proton and an electron differ slightly. One of them is –e, the other is (e + Δe). If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then Δe is of the order of [Given mass of hydrogen mh = 1.67 × 10^-27 kg]
- A. 10^-47 C
- B. 10^-20 C
- C. 10^-23 C
- D. 10^-37 C
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Q127
PHYSICS
Unit 8: Thermodynamics
Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be
- A. 2(K1 + K2)
- B. (K1 + K2)/2
- C. (K1 + K2)/3
- D. K1 + K2
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Q128
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
The photoelectric threshold wavelength of silver is 3250 × 10^-10 m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 × 10^-10 m is (Given h = 4.14 × 10^-15 eVs and c = 3 × 10^8 ms^-1)
↻ Repeated question — also appeared in
2017 (2 sets)
- A. ≈ 0.3 × 10^6 ms^-1
- B. ≈ 6 × 10^5 ms^-1
- C. ≈ 0.6 × 10^6 ms^-1
- D. ≈ 61 × 10^3 ms^-1
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Q129
PHYSICS
Unit 10: Oscillations and Waves
Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340 m/s]
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 448 Hz
- B. 350 Hz
- C. 361 Hz
- D. 411 Hz
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Q130
PHYSICS
Unit 4: Work Energy and Power
Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m/s. Take g constant with a value 10 m/s². The work done by the (i) gravitational force and the (ii) resistive force of air is
↻ Repeated question — also appeared in
2017 (1 set)
- A. (i) 10 J (ii) –8.75 J
- B. (i) – 10 J (ii) –8.25 J
- C. (i) 1.25 J (ii) –8.25 J
- D. (i) 100 J (ii) 8.75 J
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Q131
PHYSICS
Unit 8: Thermodynamics
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 1800
- B. 225
- C. 450
- D. 1000
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Q131
PHYSICS
Unit 8: Thermodynamics
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 1800
- B. 225
- C. 450
- D. 1000
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Q132
PHYSICS
Unit 11: Electrostatics
The diagrams below show regions of equipotentials. A positive charge is moved from A to B in each diagram. Which statement is correct regarding the work done?
- A. Maximum work is required to move q in figure (b).
- B. Maximum work is required to move q in figure (c).
- C. In all the four cases the work done is the same.
- D. Minimum work is required to move q in figure (a).
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Q132
PHYSICS
Unit 11: Electrostatics
The diagrams show regions of equipotentials. A positive charge is moved from A to B in each diagram. Which statement is correct?
- A. Maximum work is required to move q in figure (b).
- B. Maximum work is required to move q in figure (c).
- C. In all the four cases the work done is the same.
- D. Minimum work is required to move q in figure (a).
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Q133
PHYSICS
Unit 5: Rotational Motion
Which of the following statements are correct? (a) Centre of mass of a body always coincides with the centre of gravity of the body. (b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero. (c) A couple on a body produce both translational and rotational motion in a body. (d) Mechanical advantage greater than one means that small effort can be used to lift a large load.
↻ Repeated question — also appeared in
2017 (2 sets)
- A. (c) and (d)
- B. (b) and (d)
- C. (a) and (b)
- D. (b) and (c)
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Q134
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
If theta1 and theta2 be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip theta is given by
↻ Repeated question — also appeared in
2017 (2 sets)
- A. tan^2(theta) = tan^2(theta1) – tan^2(theta2)
- B. cot^2(theta) = cot^2(theta1) + cot^2(theta2)
- C. tan^2(theta) = tan^2(theta1) + tan^2(theta2)
- D. cot^2(theta) = cot^2(theta1) – cot^2(theta2)
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Q135
PHYSICS
Unit 18: Atoms and Nuclei
Radioactive material 'A' has decay constant '8lambda' and material 'B' has decay constant 'lambda'. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material 'B' to that 'A' will be 1/e?
- A. 1 / (9*lambda)
- B. 1 / lambda
- C. 1 / (7*lambda)
- D. 1 / (8*lambda)
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Q136
CHEMISTRY
Unit 6: Equilibrium
The equilibrium constants are: N2 + 3H2 <-> 2NH3 (K1), N2 + O2 <-> 2NO (K2), H2 + 1/2O2 <-> H2O (K3). The equilibrium constant (K) of the reaction 2NH3 + 5/2O2 <-> 2NO + 3H2O will be
↻ Repeated question — also appeared in
2017 (2 sets)
- A. (K2 * K3^3) / K1
- B. (K1 * K3^3) / K2
- C. (K2 * K3^3) / K1
- D. (K2 * K3) / K1
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Q137
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The heating of phenyl-methyl ethers with HI produces.
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Benzene
- B. Ethyl chlorides
- C. Iodobenzene
- D. Phenol
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Q138
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is
↻ Repeated question — also appeared in
2017 (1 set)
- A. Steam distillation
- B. Sublimation
- C. Chromatography
- D. Crystallisation
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Q139
CHEMISTRY
Unit 15: Hydrocarbons
Predict the correct intermediate and product in the following reaction: CH3-C ≡ CH + H2O, H2SO4, HgSO4 -> intermediate -> product
- A. A : CH3-C(OH)=CH2, B : CH3-CO-CH3
- B. A : CH3-C(SO4)=CH2, B : CH3-CO-CH3
- C. A : CH3-C(OH)=CH2, B : CH3-CH2-SO4
- D. A : CH3-CO-CH3, B : CH3-C ≡ CH
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Q140
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following reactions is appropriate for converting acetamide to methanamine?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Gabriels phthalimide synthesis
- B. Carbylamine reaction
- C. Hoffmann hypobromamide reaction
- D. Stephens reaction
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Q141
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The IUPAC name of the compound H-C(=O)-CH(CH3)-C(=O)-CH=CH-CH3 is ________.
↻ Repeated question — also appeared in
2017 (1 set)
- A. 3-keto-2-methylhex-5-enal
- B. 3-keto-2-methylhex-4-enal
- C. 5-formylhex-2-en-3-one
- D. 5-methyl-4-oxohex-2-en-5-al
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Q143
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Bicyclic ketone product
- B. Cyclohexanol derivative
- C. Dicyclohexenyl ketone derivative
- D. Cyclohexyl alcohol
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Q144
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following pairs of compounds is isoelectronic and isostructural?
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2017 (3 sets)
- A. IF3, XeF2
- B. BeCl2, XeF2
- C. TeI2, XeF2
- D. IBr2-, XeF2
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Q144
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following pairs of compounds is isoelectronic and isostructural?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. IF3, XeF2
- B. BeCl2, XeF2
- C. TeI2, XeF2
- D. IBr2-, XeF2
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Q145
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Consider the reactions: Ethanol (X) treated with Cu/573 K gives A. A gives a positive silver mirror test. A undergoes aldol condensation to give Y. A reacts with semicarbazide to give Z. Identify A, X, Y and Z.
- A. A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone
- B. A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-hydrazine
- C. A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide
- D. A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone
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Q146
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which one is the most acidic compound?
- A. 2,4,6-trinitrophenol (picric acid)
- B. o-methylphenol (o-cresol)
- C. phenol
- D. p-nitrophenol
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Q147
CHEMISTRY
Unit 10: p-Block Elements
Name the gas that can readily decolourise acidified KMnO4 solution:
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2017 (2 sets)
- A. P2O5
- B. CO2
- C. SO2
- D. NO2
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Q148
CHEMISTRY
Unit 15: Hydrocarbons
Which one is the correct order of acidity?
- A. CH3-CH3 > CH2=CH2 > CH3-C≡CH > CH≡CH
- B. CH2=CH2 > CH3-CH=CH2 > CH3-C≡CH > CH≡CH
- C. CH≡CH > CH3-C≡CH > CH2=CH2 > CH3-CH3
- D. CH≡CH > CH2=CH2 > CH3-C≡CH > CH3-CH3
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Q149
CHEMISTRY
Unit 6: Equilibrium
Concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 × 10^-4 mol L^-1. Solubility product of Ag2C2O4 is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 5.3 × 10^-12
- B. 2.42 × 10^-8
- C. 2.66 × 10^-12
- D. 4.5 × 10^-11
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Q150
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
With respect to the conformers of ethane, which of the following statements is true?
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- A. Both bond angles and bond length remains same
- B. Bond angle remains same but bond length changes
- C. Bond angle changes but bond length remains same
- D. Both bond angle and bond length change
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Q151
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The correct statement regarding electrophile is
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
- B. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
- C. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
- D. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
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Q151
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The correct statement regarding electrophile is
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
- B. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
- C. Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
- D. Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
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Q152
CHEMISTRY
Unit 2: Atomic Structure
Which one is the wrong statement?
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- A. The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms
- B. de-Broglie's wavelength is given by λ = h/mv, where m = mass, v = velocity
- C. The uncertainty principle is ΔE * Δt ≥ h / 4π
- D. Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement
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Q152
CHEMISTRY
Unit 2: Atomic Structure
Which one is the wrong statement?
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2017 (3 sets)
- A. The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms
- B. de-Broglie's wavelength is given by λ = h/mv, where m = mass of the particle, v = group velocity of the particle
- C. The uncertainty principle is ΔE * Δt ≥ h/4π
- D. Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement
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Q153
CHEMISTRY
Unit 12: Coordination Compounds
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+
- B. [Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+
- C. [Co(H2O)6]3+, [Co(en)3]3+, [Co(NH3)6]3+
- D. [Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+
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Q154
CHEMISTRY
Unit 10: p-Block Elements
Match the interhalogen compounds of column I with the geometry in column II and assign the correct code: Column I (a) XX', (b) XX'3, (c) XX'5, (d) XX'7; Column II (i) T-shape, (ii) Pentagonal bipyramidal, (iii) Linear, (iv) Square-pyramidal, (v) Tetrahedral.
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2017 (1 set)
- A. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- B. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- C. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- D. (a)-(v), (b)-(iv), (c)-(iii), (d)-(ii)
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Q155
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
The species, having bond angles of 120° is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. BCl3
- B. PH3
- C. ClF3
- D. NCl3
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Q156
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
The correct increasing order of basic strength for the following compounds is (I) p-nitroaniline, (II) aniline, (III) p-toluidine.
↻ Repeated question — also appeared in
2017 (2 sets)
- A. II < I < III
- B. II < III < I
- C. III < I < II
- D. III < II < I
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Q157
CHEMISTRY
Unit 8: Chemical Kinetics
Which one of the following statements is not correct?
- A. Coenzymes increase the catalytic activity of enzyme
- B. Catalyst does not initiate any reaction
- C. The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium
- D. Enzymes catalyse mainly bio-chemical reactions
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Q158
CHEMISTRY
Unit 4: Chemical Thermodynamics
A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joules will be
↻ Repeated question — also appeared in
2017 (1 set)
- A. +505 J
- B. 1136.25 J
- C. –500 J
- D. –505 J
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Q159
CHEMISTRY
Unit 6: Equilibrium
A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO. The volume of the containers is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value, will be (Given that: SrCO3(s) ⇌ SrO(s) + CO2(g), Kp = 1.6 atm)
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 2 litre
- B. 5 litre
- C. 10 litre
- D. 4 litre
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Q160
CHEMISTRY
Unit 19: Biomolecules
Which of the following statements is not correct?
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2017 (3 sets)
- A. Denaturation makes the proteins more active
- B. Insulin maintains sugar level in the blood of a human body
- C. Ovalbumin is a simple food reserve in egg-white
- D. Blood proteins thrombin and fibrinogen are involved in blood clotting
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Q160
CHEMISTRY
Unit 19: Biomolecules
Which of the following statements is not correct?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. Denaturation makes the proteins more active
- B. Insulin maintains sugar level in the blood of a human body
- C. Ovalbumin is a simple food reserve in egg-white
- D. Blood proteins thrombin and fibrinogen are involved in blood clotting
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Q161
CHEMISTRY
Unit 8: Chemical Kinetics
Mechanism of a hypothetical reaction X2 + Y2 -> 2XY is given below: (i) X2 ⇌ X + X (fast) (ii) X + Y2 -> XY + Y (slow) (iii) X + Y -> XY (fast) The overall order of the reaction will be
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 1.5
- B. 1
- C. 2
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Q162
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
In which pair of ions both the species contain S – S bond?
- A. S4O6 2–, S2O7 2–
- B. S2O7 2–, S2O3 2–
- C. S4O6 2–, S2O3 2–
- D. S2O7 2–, S2O8 2–
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Q163
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which one of the following pairs of species have the same bond order?
↻ Repeated question — also appeared in
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- A. N2, O2–
- B. CO, NO
- C. O2, NO+
- D. CN–, CO
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Q164
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
Mixture of chloroxylenol and terpineol acts as
↻ Repeated question — also appeared in
2017 (1 set)
- A. Antibiotic
- B. Analgesic
- C. Antiseptic
- D. Antipyretic
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Q165
CHEMISTRY
Unit 10: p-Block Elements
It is because of inability of ns2 electrons of the valence shell to participate in bonding that
↻ Repeated question — also appeared in
2017 (2 sets)
- A. Sn4+ is reducing while Pb4+ is oxidising
- B. Sn2+ is reducing while Pb4+ is oxidising
- C. Sn2+ is oxidising while Pb4+ is reducing
- D. Sn2+ and Pb2+ are both oxidising and reducing
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Q166
CHEMISTRY
Unit 4: Chemical Thermodynamics
For a given reaction, ΔH = 35.5 kJ mol–1 and ΔS = 83.6 JK–1 mol–1. The reaction is spontaneous at : (Assume that ΔH and ΔS do not vary with temperature)
↻ Repeated question — also appeared in
2017 (2 sets)
- A. T > 298 K
- B. T < 425 K
- C. T > 425 K
- D. All temperatures
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Q167
CHEMISTRY
Unit 5: Solutions
If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be
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- A. Unchanged
- B. Doubled
- C. Halved
- D. Tripled
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Q168
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Which of the following is dependent on temperature?
- A. Weight percentage
- B. Molality
- C. Molarity
- D. Mole fraction
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Q168
CHEMISTRY
Unit 5: Solutions
Which of the following is dependent on temperature?
↻ Repeated question — also appeared in
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- A. Weight percentage
- B. Molality
- C. Molarity
- D. Mole fraction
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Q169
CHEMISTRY
Unit 12: Coordination Compounds
Pick out the correct statement with respect [Mn(CN)6]3–
↻ Repeated question — also appeared in
2017 (3 sets)
- A. It is dsp2 hybridised and square planar
- B. It is sp3d2 hybridised and octahedral
- C. It is sp3d2 hybridised and tetrahedral
- D. It is d2sp3 hybridised and octahedral
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Q169
CHEMISTRY
Unit 12: Coordination Compounds
Pick out the correct statement with respect to [Mn(CN)6]3–
↻ Repeated question — also appeared in
2017 (3 sets)
- A. It is dsp2 hybridised and square planar
- B. It is sp3d2 hybridised and octahedral
- C. It is sp3d2 hybridised and tetrahedral
- D. It is d2sp3 hybridised and octahedral
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Q170
PHYSICS
Unit 7: Properties of Solids and Liquids
Which is the incorrect statement?
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2017 (1 set)
- A. Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal
- B. FeO0.98 has non stoichiometric metal deficiency defect
- C. Density decreases in case of crystals with Schottky's defect
- D. NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal
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Q171
CHEMISTRY
Unit 12: Coordination Compounds
HgCl2 and I2 both when dissolved in water containing I– ions the pair of species formed is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. [HgI2]2-, I-
- B. [HgI3]-, I-
- C. [HgI2]-, I-
- D. [HgI4]2-, I3-
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Q172
CHEMISTRY
Unit 11: d- and f-Block Elements
Extraction of gold and silver involves leaching with CN– ion. Silver is later recovered by
↻ Repeated question — also appeared in
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- A. Displacement with Zn
- B. Liquation
- C. Distillation
- D. Zone refining
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Q173
CHEMISTRY
Unit 12: Coordination Compounds
The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes: CoCl3·6NH3, CoCl3·5NH3, CoCl3·4NH3 respectively is
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 2 AgCl, 3 AgCl, 1 AgCl
- B. 1 AgCl, 3 AgCl, 2 AgCl
- C. 3 AgCl, 1 AgCl, 2 AgCl
- D. 3 AgCl, 2 AgCl, 1 AgCl
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Q174
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Identify A and predict the type of reaction in the presence of NaNH2.
- A. Methoxybenzene and cine substitution reaction
- B. o-methoxyaniline and substitution reaction
- C. o-methoxyaniline and elimination addition reaction
- D. o-bromo-methoxybenzene and cine substitution reaction
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Q175
CHEMISTRY
Unit 12: Coordination Compounds
An example of a sigma bonded organometallic compound is
↻ Repeated question — also appeared in
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- A. Cobaltocene
- B. Ruthenocene
- C. Grignard's reagent
- D. Ferrocene
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Q176
CHEMISTRY
Unit 11: d- and f-Block Elements
The reason for greater range of oxidation states in actinoids is attributed to
↻ Repeated question — also appeared in
2017 (2 sets)
- A. 4f and 5d levels being close in energies
- B. The radioactive nature of actinoids
- C. Actinoid contraction
- D. 5f, 6d and 7s levels having comparable energies
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Q177
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
The element Z = 114 has been discovered recently. It will belong to which of the following family group and electronic configuration?
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2017 (2 sets)
- A. Nitrogen family, [Rn] 5f14 6d10 7s2 7p6
- B. Halogen family, [Rn] 5f14 6d10 7s2 7p5
- C. Carbon family, [Rn] 5f14 6d10 7s2 7p2
- D. Oxygen family, [Rn] 5f14 6d10 7s2 7p4
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Q178
CHEMISTRY
Unit 8: Chemical Kinetics
A first order reaction has a specific reaction rate of 10–2 s–1. How much time will it take for 20 g of the reactant to reduce to 5 g?
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2017 (3 sets)
- A. 693.0 second
- B. 238.6 second
- C. 138.6 second
- D. 346.5 second
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Q178
CHEMISTRY
Unit 8: Chemical Kinetics
A first order reaction has a specific reaction rate of 10⁻² s⁻¹. How much time will it take for 20 g of the reactant to reduce to 5 g?
↻ Repeated question — also appeared in
2017 (3 sets)
- A. 693.0 second
- B. 238.6 second
- C. 138.6 second
- D. 346.5 second
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Q179
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
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2017 (1 set)
- A. Li+
- B. Na+
- C. K+
- D. Rb+
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Q179
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
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- A. Li⁺
- B. Na⁺
- C. K⁺
- D. Rb⁺
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Q180
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
In the electrochemical cell Zn|ZnSO₄(0.01M)||CuSO₄(1.0 M)|Cu, the emf of this Daniel cell is E₁. When the concentration of ZnSO₄ is changed to 1.0 M and that of CuSO₄ changed to 0.01 M, the emf changes to E₂. From the following, which one is the relationship between E₁ and E₂? (Given, RT/F = 0.059)
↻ Repeated question — also appeared in
2017 (2 sets)
- A. E₂ = 0 ≠ E₁
- B. E₁ = E₂
- C. E₁ < E₂
- D. E₁ > E₂
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