Q1
BIOLOGY
Unit 7: Genetics and Evolution
Name the enzyme that facilitates opening of DNA helix during transcription.
↻ Repeated question — also appeared in
2020 (6 sets)
- A. DNA polymerase
- B. RNA polymerase
- C. DNA ligase
- D. DNA helicase
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Q2
BIOLOGY
Unit 5: Human Physiology
Which of the following would help in prevention of diuresis?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Atrial natriuretic factor causes vasoconstriction
- B. Decrease in secretion of renin by JG cells
- C. More water reabsorption due to undersecretion of ADH
- D. Reabsorption of Na+ and water from renal tubules due to aldosterone
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Q3
BIOLOGY
Unit 6: Reproduction
Meiotic division of the secondary oocyte is completed
↻ Repeated question — also appeared in
2020 (8 sets)
- A. After zygote formation
- B. At the time of fusion of a sperm with an ovum
- C. Prior to ovulation
- D. At the time of copulation
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Q4
BIOLOGY
Unit 4: Plant Physiology
Match the following concerning essential elements and their functions in plants:
(a) Iron — (i) Photolysis of water
(b) Zinc — (ii) Pollen germination
(c) Boron — (iii) Required for chlorophyll biosynthesis
(d) Manganese — (iv) IAA biosynthesis
Select the correct option.
↻ Repeated question — also appeared in
2020 (5 sets)
- A. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- B. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- C. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
- D. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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Q5
BIOLOGY
Unit 1: Diversity in Living World
Which of the following pairs is of unicellular algae?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Anabaena and Volvox
- B. Chlorella and Spirulina
- C. Laminaria and Sargassum
- D. Gelidium and Gracilaria
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Q6
BIOLOGY
Unit 4: Plant Physiology
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 1 molecule of 6-C compound
- B. 1 molecule of 4-C compound and 1 molecule of 2-C compound
- C. 2 molecules of 3-C compound
- D. 1 molecule of 3-C compound
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Q7
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option.
Column-I: (a) Eosinophils, (b) Basophils, (c) Neutrophils, (d) Lymphocytes
Column-II: (i) Immune response, (ii) Phagocytosis, (iii) Release histaminase, destructive enzymes, (iv) Release granules containing histamine
↻ Repeated question — also appeared in
2020 (4 sets)
- A. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
- B. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
- C. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- D. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
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Q8
BIOLOGY
Unit 6: Reproduction
Match the following columns and select the correct option.
Column-I: (a) Placenta, (b) Zona pellucida, (c) Bulbo-urethral glands, (d) Leydig cells
Column-II: (i) Androgens, (ii) Human Chorionic Gonadotropin (hCG), (iii) Layer of the ovum, (iv) Lubrication of the penis
↻ Repeated question — also appeared in
2020 (3 sets)
- A. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
- B. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- C. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- D. (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
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Q8
BIOLOGY
Unit 6: Reproduction
Match the following columns and select the correct option.
Column-I | Column-II
(a) Placenta | (i) Androgens
(b) Zona pellucida | (ii) Human Chorionic Gonadotropin (hCG)
(c) Bulbo-urethral glands | (iii) Layer of the ovum
(d) Leydig cells | (iv) Lubrication of the Penis
↻ Repeated question — also appeared in
2020 (5 sets)
- A. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- B. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
- C. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- D. (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
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Q9
BIOLOGY
Unit 6: Reproduction
The plant parts which consist of two generations - one within the other:
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule
↻ Repeated question — also appeared in
2020 (6 sets)
- A. (c) and (d)
- B. (a) and (d)
- C. (a) only
- D. (a), (b) and (c)
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Q9
BIOLOGY
Unit 6: Reproduction
The plant parts which consist of two generations — one within the other are:
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule
↻ Repeated question — also appeared in
2020 (6 sets)
- A. (c) and (d)
- B. (a) and (d)
- C. (a) only
- D. (a), (b) and (c)
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Q10
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements about inclusion bodies is incorrect?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. They lie free in the cytoplasm
- B. These represent reserve material in cytoplasm
- C. They are not bound by any membrane
- D. These are involved in ingestion of food particles
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Q10
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements about inclusion bodies is incorrect?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. They lie free in the cytoplasm
- B. These represent reserve material in cytoplasm
- C. They are not bound by any membrane
- D. These are involved in ingestion of food particles
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Q11
BIOLOGY
Unit 1: Diversity in Living World
Strobili or cones are found in
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Marchantia
- B. Equisetum
- C. Salvinia
- D. Pteris
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Q11
BIOLOGY
Unit 1: Diversity in Living World
Strobili or cones are found in
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Marchantia
- B. Equisetum
- C. Salvinia
- D. Pteris
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Q12
BIOLOGY
Unit 10: Ecology and Environment
Montreal protocol was signed in 1987 for control of
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Release of Green House gases
- B. Disposal of e-wastes
- C. Transport of Genetically modified organisms from one country to another
- D. Emission of ozone depleting substances
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Q13
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following statements is correct?
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Adenine pairs with thymine through three H-bonds
- B. Adenine does not pair with thymine
- C. Adenine pairs with thymine through two H-bonds
- D. Adenine pairs with thymine through one H-bond
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Q14
BIOLOGY
Unit 6: Reproduction
The body of the ovule is fused within the funicle at
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Nucellus
- B. Chalaza
- C. Hilum
- D. Micropyle
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Q15
BIOLOGY
Unit 9: Biotechnology and Its Applications
The sequence that controls the copy number of the linked DNA in the vector, is termed
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Palindromic sequence
- B. Recognition site
- C. Selectable marker
- D. Ori site
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Q16
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the wrong statement with regard to Restriction Enzymes.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. They are useful in genetic engineering.
- B. Sticky ends can be joined by using DNA ligases.
- C. Each restriction enzyme functions by inspecting the length of a DNA sequence.
- D. They cut the strand of DNA at palindromic sites.
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Q17
BIOLOGY
Unit 4: Plant Physiology
The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Ammonia and oxygen
- B. Ammonia and hydrogen
- C. Ammonia alone
- D. Nitrate alone
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Q18
BIOLOGY
Unit 4: Plant Physiology
In light reaction, plastoquinone facilitates the transfer of electrons from
↻ Repeated question — also appeared in
2020 (8 sets)
- A. PS-I to NADP⁺
- B. PS-I to ATP synthase
- C. PS-II to Cytb₆f complex
- D. Cytb₆f complex to PS-I
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Q19
BIOLOGY
Unit 5: Human Physiology
Which of the following hormone levels will cause release of ovum (ovulation) from the graafian follicle?
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Low concentration of LH
- B. Low concentration of FSH
- C. High concentration of Estrogen
- D. High concentration of Progesterone
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Q20
BIOLOGY
Unit 7: Genetics and Evolution
The first phase of translation is
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Aminoacylation of tRNA
- B. Recognition of an anti-codon
- C. Binding of mRNA to ribosome
- D. Recognition of DNA molecule
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Q21
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The roots that originate from the base of the stem are
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Prop roots
- B. Lateral roots
- C. Fibrous roots
- D. Primary roots
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Q22
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to transport of oxygen.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Higher H⁺ concentration in alveoli favours the formation of oxyhaemoglobin
- B. Low pCO₂ in alveoli favours the formation of oxyhaemoglobin
- C. Binding of oxygen with haemoglobin is mainly related to partial pressure of O₂
- D. Partial pressure of CO₂ can interfere with O₂ binding with haemoglobin
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Q23
BIOLOGY
Unit 9: Biotechnology and Its Applications
In gel electrophoresis, separated DNA fragments can be visualized with the help of
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Acetocarmine in UV radiation
- B. Ethidium bromide in infrared radiation
- C. Acetocarmine in bright blue light
- D. Ethidium bromide in UV radiation
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Q24
BIOLOGY
Unit 5: Human Physiology
The enzyme enterokinase helps in conversion of
↻ Repeated question — also appeared in
2020 (8 sets)
- A. caseinogen into casein
- B. pepsinogen into pepsin
- C. protein into polypeptides
- D. trypsinogen into trypsin
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Q25
BIOLOGY
Unit 7: Genetics and Evolution
Experimental verification of the chromosomal theory of inheritance was done by
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Boveri
- B. Morgan
- C. Mendel
- D. Sutton
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Q25
BIOLOGY
Unit 7: Genetics and Evolution
Experimental verification of the chromosomal theory of inheritance was done by
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Boveri
- B. Morgan
- C. Mendel
- D. Sutton
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Q26
BIOLOGY
Unit 10: Ecology and Environment
According to Robert May, the global species diversity is about
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 50 million
- B. 7 million
- C. 1.5 million
- D. 20 million
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Q26
BIOLOGY
Unit 10: Ecology and Environment
According to Robert May, the global species diversity is about
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 50 million
- B. 7 million
- C. 1.5 million
- D. 20 million
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Q27
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the organism with its use in biotechnology.
(a) Bacillus thuringiensis | (i) Cloning vector
(b) Thermus aquaticus | (ii) Construction of first rDNA molecule
(c) Agrobacterium tumefaciens | (iii) DNA polymerase
(d) Salmonella typhimurium | (iv) Cry proteins
Select the correct option from the following:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
- B. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- C. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
- D. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
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Q28
BIOLOGY
Unit 3: Cell Structure and Function
Identify the correct statement with regard to G₁ phase (Gap 1) of interphase.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Cell is metabolically active, grows but does not replicate its DNA.
- B. Nuclear Division takes place.
- C. DNA synthesis or replication takes place.
- D. Reorganisation of all cell components takes place.
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Q28
BIOLOGY
Unit 3: Cell Structure and Function
Identify the correct statement with regard to G₁ phase (Gap 1) of interphase.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Cell is metabolically active, grows but does not replicate its DNA.
- B. Nuclear Division takes place.
- C. DNA synthesis or replication takes place.
- D. Reorganisation of all cell components takes place.
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Q29
BIOLOGY
Unit 1: Diversity in Living World
Which of the following is correct about viroids?
↻ Repeated question — also appeared in
2020 (5 sets)
- A. They have DNA with protein coat
- B. They have free DNA without protein coat
- C. They have RNA with protein coat
- D. They have free RNA without protein coat
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Q30
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The transverse section of a plant shows the following anatomical features:
(a) Large number of scattered vascular bundles surrounded by bundle sheath
(b) Large conspicuous parenchymatous ground tissue
(c) Vascular bundles conjoint and closed
(d) Phloem parenchyma absent
Identify the category of plant and its part:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Dicotyledonous stem
- B. Dicotyledonous root
- C. Monocotyledonous stem
- D. Monocotyledonous root
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Q31
BIOLOGY
Unit 7: Genetics and Evolution
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask
↻ Repeated question — also appeared in
2020 (5 sets)
- A. CH₄, H₂, NH₃ and water vapor at 600°C
- B. CH₃, H₂, NH₃ and water vapor at 600°C
- C. CH₄, H₂, NH₃ and water vapor at 800°C
- D. CH₃, H₂, NH₄ and water vapor at 800°C
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Q32
CHEMISTRY
Unit 19: Biomolecules
Identify the basic amino acid from the following.
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2020 (4 sets)
- A. Lysine
- B. Valine
- C. Tyrosine
- D. Glutamic Acid
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Q33
BIOLOGY
Unit 10: Ecology and Environment
Snow-blindness in Antarctic region is due to
↻ Repeated question — also appeared in
2020 (6 sets)
- A. High reflection of light from snow
- B. Damage to retina caused by infra-red rays
- C. Freezing of fluids in the eye by low temperature
- D. Inflammation of cornea due to high dose of UV-B radiation
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Q34
BIOLOGY
Unit 3: Cell Structure and Function
Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G₀). This process occurs at the end of
↻ Repeated question — also appeared in
2020 (7 sets)
- A. S phase
- B. G₂ phase
- C. M phase
- D. G₁ phase
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Q35
BIOLOGY
Unit 10: Ecology and Environment
Which of the following regions of the globe exhibits highest species diversity?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Himalayas
- B. Amazon forests
- C. Western Ghats of India
- D. Madagascar
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Q36
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the incorrect statement.
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Sapwood is the innermost secondary xylem and is lighter in colour
- B. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
- C. Heart wood does not conduct water but gives mechanical support
- D. Sapwood is involved in conduction of water and minerals from root to leaf
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Q37
BIOLOGY
Unit 1: Diversity in Living World
Floridean starch has structure similar to
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Mannitol and algin
- B. Laminarin and cellulose
- C. Starch and cellulose
- D. Amylopectin and glycogen
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Q38
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is not an attribute of a population?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Mortality
- B. Species interaction
- C. Sex ratio
- D. Natality
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Q39
BIOLOGY
Unit 4: Plant Physiology
The number of substrate level phosphorylations in one turn of citric acid cycle is
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Two
- B. Three
- C. Zero
- D. One
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Q40
BIOLOGY
Unit 5: Human Physiology
Identify the correct statement with reference to human digestive system.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Ileum is a highly coiled part
- B. Vermiform appendix arises from duodenum
- C. Ileum opens into small intestine
- D. Serosa is the innermost layer of the alimentary canal
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Q41
BIOLOGY
Unit 6: Reproduction
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. ICSI and ZIFT
- B. GIFT and ICSI
- C. ZIFT and IUT
- D. GIFT and ZIFT
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Q41
BIOLOGY
Unit 6: Reproduction
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. ICSI and ZIFT
- B. GIFT and ICSI
- C. ZIFT and IUT
- D. GIFT and ZIFT
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Q42
BIOLOGY
Unit 10: Ecology and Environment
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Gross primary productivity and Net primary productivity are one and same
- B. There is no relationship between Gross primary productivity and Net primary productivity
- C. Gross primary productivity is always less than net primary productivity
- D. Gross primary productivity is always more than net primary productivity
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Q42
BIOLOGY
Unit 10: Ecology and Environment
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Gross primary productivity and Net primary productivity are one and same
- B. There is no relationship between Gross primary productivity and Net primary productivity
- C. Gross primary productivity is always less than net primary productivity
- D. Gross primary productivity is always more than net primary productivity
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Q43
BIOLOGY
Unit 4: Plant Physiology
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Ethylene
- B. Abscisic acid
- C. Cytokinin
- D. Gibberellin
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Q43
BIOLOGY
Unit 4: Plant Physiology
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Ethylene
- B. Abscisic acid
- C. Cytokinin
- D. Gibberellin
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Q44
BIOLOGY
Unit 4: Plant Physiology
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Defence action
- B. Effect on reproduction
- C. Nutritive value
- D. Growth response
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Q45
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Sickle cell anaemia – Autosomal recessive trait, chromosome-11
- B. Thalassemia – X linked
- C. Haemophilia – Y linked
- D. Phenylketonuria – Autosomal dominant trait
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Q46
BIOLOGY
Unit 5: Human Physiology
Select the correct statement.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Insulin acts on pancreatic cells and adipocytes.
- B. Insulin is associated with hyperglycemia.
- C. Glucocorticoids stimulate gluconeogenesis.
- D. Glucagon is associated with hypoglycemia.
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Q47
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?
(a) Darwin's Finches of Galapagos islands.
(b) Herbicide resistant weeds.
(c) Drug resistant eukaryotes.
(d) Man-created breeds of domesticated animals like dogs.
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2020 (6 sets)
- A. (b), (c) and (d)
- B. only (d)
- C. only (a)
- D. (a) and (c)
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Q48
BIOLOGY
Unit 9: Biotechnology and Its Applications
Choose the correct pair from the following
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Nucleases - Separate the two strands of DNA
- B. Exonucleases - Make cuts at specific positions within DNA
- C. Ligases - Join the two DNA molecules
- D. Polymerases - Break the DNA into fragments
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Q49
BIOLOGY
Unit 7: Genetics and Evolution
Embryological support for evolution was disapproved by
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Charles Darwin
- B. Oparin
- C. Karl Ernst von Baer
- D. Alfred Wallace
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Q50
BIOLOGY
Unit 5: Human Physiology
Goblet cells of alimentary canal are modified from
- A. Chondrocytes
- B. Compound epithelial cells
- C. Squamous epithelial cells
- D. Columnar epithelial cells
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Q51
BIOLOGY
Unit 9: Biotechnology and Its Applications
Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Plant nematodes
- B. Insect predators
- C. Insect pests
- D. Fungal diseases
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Q52
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements are true for the phylum-Chordata?
(a) In Urochordata notochord extends from head to tail and it is present throughout their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. (a) and (b)
- B. (b) and (c)
- C. (d) and (c)
- D. (c) and (a)
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Q53
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is put into Anaerobic sludge digester for further sewage treatment?
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2020 (5 sets)
- A. Effluents of primary treatment
- B. Activated sludge
- C. Primary sludge
- D. Floating debris
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Q54
BIOLOGY
Unit 3: Cell Structure and Function
Identify the substances having glycosidic bond and peptide bond, respectively in their structure
↻ Repeated question — also appeared in
2020 (1 set)
- A. Cellulose, lecithin
- B. Inulin, insulin
- C. Chitin, cholesterol
- D. Glycerol, trypsin
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Q55
BIOLOGY
Unit 8: Biology and Human Welfare
Match the following diseases with the causative organism and select the correct option.
Column-I: (a) Typhoid, (b) Pneumonia, (c) Filariasis, (d) Malaria
Column-II: (i) Wuchereria, (ii) Plasmodium, (iii) Salmonella, (iv) Haemophilus
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2020 (1 set)
- A. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
- B. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- C. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
- D. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
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Q56
BIOLOGY
Unit 8: Biology and Human Welfare
Match the following columns and select the correct option.
Column-I: (a) Clostridium butylicum, (b) Trichoderma polysporum, (c) Monascus purpureus, (d) Aspergillus niger
Column-II: (i) Cyclosporin-A, (ii) Butyric Acid, (iii) Citric Acid, (iv) Blood cholesterol lowering agent
↻ Repeated question — also appeared in
2020 (4 sets)
- A. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
- B. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- C. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- D. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
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Q56
BIOLOGY
Unit 8: Biology and Human Welfare
Match the following columns and select the correct option.
Column-I Column-II
(a) Clostridium butylicum (i) Cyclosporin-A
(b) Trichoderma polysporum (ii) Butyric Acid
(c) Monascus purpureus (iii) Citric Acid
(d) Aspergillus niger (iv) Blood cholesterol lowering agent
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2020 (2 sets)
- A. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
- B. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- C. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- D. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
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Q57
BIOLOGY
Unit 8: Biology and Human Welfare
By which method was a new breed 'Hisardale' of sheep formed by using Bikaneri ewes and Marino rams?
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2020 (6 sets)
- A. Cross breeding
- B. Inbreeding
- C. Out crossing
- D. Mutational breeding
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Q57
BIOLOGY
Unit 8: Biology and Human Welfare
By which method was a new breed 'Hisardale' of sheep formed by using Bikaneri ewes and Marino rams?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Cross breeding
- B. Inbreeding
- C. Out crossing
- D. Mutational breeding
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Q58
BIOLOGY
Unit 5: Human Physiology
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
↻ Repeated question — also appeared in
2020 (7 sets)
- A. (a), (b) and (d)
- B. only (d)
- C. (a) and (b)
- D. (c) and (d)
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Q58
BIOLOGY
Unit 5: Human Physiology
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
↻ Repeated question — also appeared in
2020 (7 sets)
- A. (a), (b) and (d)
- B. Only (d)
- C. (a) and (b)
- D. (c) and (d)
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Q59
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
Column-I Column-II
(a) Gregarious, polyphagous pest (i) Asterias
(b) Adult with radial symmetry and larva with bilateral symmetry (ii) Scorpion
(c) Book lungs (iii) Ctenoplana
(d) Bioluminescence (iv) Locusta
- A. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
- B. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
- C. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
- D. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
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Q60
BIOLOGY
Unit 3: Cell Structure and Function
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
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- A. Golgi bodies
- B. Polysomes
- C. Endoplasmic reticulum
- D. Peroxisomes
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Q61
BIOLOGY
Unit 9: Biotechnology and Its Applications
The specific palindromic sequence which is recognized by EcoRI is
↻ Repeated question — also appeared in
2020 (5 sets)
- A. 5'-CTTAAG-3' / 3'-GAATTC-5'
- B. 5'-GGATCC-3' / 3'-CCTAGG-5'
- C. 5'-GAATTC-3' / 3'-CTTAAG-5'
- D. 5'-GGAACC-3' / 3'-CCTTGG-5'
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Q62
BIOLOGY
Unit 7: Genetics and Evolution
Dissolution of the synaptonemal complex occurs during
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Diplotene
- B. Leptotene
- C. Pachytene
- D. Zygotene
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Q91
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacids of sulphur has –O–O– linkage?
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- A. H₂S₂O₈, peroxodisulphuric acid
- B. H₂S₂O₇, pyrosulphuric acid
- C. H₂SO₃, sulphurous acid
- D. H₂SO₄, sulphuric acid
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Q92
CHEMISTRY
Unit 8: Chemical Kinetics
An increase in the concentration of the reactants of a reaction leads to change in
↻ Repeated question — also appeared in
2020 (7 sets)
- A. threshold energy
- B. collision frequency
- C. activation energy
- D. heat of reaction
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Q93
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
Identify the incorrect match.
Name — IUPAC Official Name
(a) Unnilunium — Mendelevium
(b) Unniltrium — Lawrencium
(c) Unnilhexium — Seaborgium
(d) Unununnium — Darmstadtium
- A. (c), (iii)
- B. (d), (iv)
- C. (a), (i)
- D. (b), (ii)
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Q94
PHYSICS
Unit 9: Kinetic Theory of Gases
A mixture of N₂ and Ar gases in a cylinder contains 7 g of N₂ and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N₂ is:
[Use atomic masses (in g mol⁻¹): N = 14, Ar = 40]
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- A. 15 bar
- B. 18 bar
- C. 9 bar
- D. 12 bar
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Q95
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Cross Cannizzaro's reaction
- B. Cross Aldol condensation
- C. Aldol condensation
- D. Cannizzaro's reaction
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Q96
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Which one of the following has maximum number of atoms?
(1) 1 g of O₂(g) [Atomic mass of O = 16]
(2) 1 g of Li(s) [Atomic mass of Li = 7]
(3) 1 g of Ag(s) [Atomic mass of Ag = 108]
(4) 1 g of Mg(s) [Atomic mass of Mg = 24]
- A. 1 g of O₂(g) [Atomic mass of O = 16]
- B. 1 g of Li(s) [Atomic mass of Li = 7]
- C. 1 g of Ag(s) [Atomic mass of Ag = 108]
- D. 1 g of Mg(s) [Atomic mass of Mg = 24]
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Q97
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Anisole on cleavage with HI gives
↻ Repeated question — also appeared in
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- A. Phenol + C₂H₅I
- B. Iodobenzene + C₂H₅OH
- C. Phenol + CH₃I
- D. Iodobenzene + CH₃OH
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Q98
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following amine will give the carbylamine test?
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2020 (6 sets)
- A. N(CH₃)₃ (trimethylamine)
- B. C₂H₅NHCH₃ (N-methylethylamine, secondary amine)
- C. Aniline (primary aromatic amine, –NH₂)
- D. N-methylaniline (secondary amine, –NHCH₃)
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Q99
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect statement.
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- A. Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
- B. The oxidation states of chromium in CrO₄²⁻ and Cr₂O₇²⁻ are not the same.
- C. Cr²⁺ (d⁴) is a stronger reducing agent than Fe²⁺ (d⁶) in water.
- D. The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.
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Q100
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
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- A. Tyrosine
- B. Lysine
- C. Serine
- D. Alanine
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Q100
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
↻ Repeated question — also appeared in
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- A. Tyrosine
- B. Lysine
- C. Serine
- D. Alanine
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Q101
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a natural polymer?
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- A. Polybutadiene
- B. Poly (Butadiene-acrylonitrile)
- C. cis-1,4-polyisoprene
- D. Poly (Butadiene-styrene)
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Q101
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a natural polymer?
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Polybutadiene
- B. Poly (Butadiene-acrylonitrile)
- C. cis-1,4-polyisoprene
- D. Poly (Butadiene-styrene)
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Q102
CHEMISTRY
Unit 10: p-Block Elements
Match the following and identify the correct option.
(a) CO(g) + H₂(g)
(b) Temporary hardness of water
(c) B₂H₆
(d) H₂O₂
(i) Mg(HCO₃)₂ + Ca(HCO₃)₂
(ii) An electron deficient hydride
(iii) Synthesis gas
(iv) Non-planar structure
↻ Repeated question — also appeared in
2020 (1 set)
- A. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- B. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
- C. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
- D. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
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Q103
CHEMISTRY
Unit 15: Hydrocarbons
An alkene on ozonolysis gives methanal (HCHO) as one of the products. Its structure is
↻ Repeated question — also appeared in
2020 (6 sets)
- A. CH₂ = CH – CH₃ (but-1-ene structure: CH₂=CHCH₃, propene)
- B. CH₃ – CH = CH – CH₃
- C. CH₃ – CH = CH₂ (propene)
- D. CH₃ – CH₂ – CH₃ (propane)
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Q103
CHEMISTRY
Unit 15: Hydrocarbons
An alkene on ozonolysis gives methanal as one of the products. Its structure is:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. CH₂=CH–CH₂ (i.e., CH₂=CHCH₃ — propene, which has a terminal =CH₂ group)
- B. CH₃–CH₂–CH₃
- C. CH₃–CH=CH₂ (but-2-ene type structure, internal double bond)
- D. CH₂–CH₂–CH₃
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Q104
CHEMISTRY
Unit 8: Chemical Kinetics
The rate constant for a first order reaction is 4.606 × 10⁻³ s⁻¹. The time required to reduce 2.0 g of the reactant to 0.2 g is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 500 s
- B. 1000 s
- C. 100 s
- D. 200 s
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Q105
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
On electrolysis of dilute sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. H₂S gas
- B. SO₂ gas
- C. Hydrogen gas
- D. Oxygen gas
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Q106
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is:
- A. (4/√3) × 288 pm
- B. (4/√2) × 288 pm
- C. (√3/4) × 288 pm
- D. (√2/4) × 288 pm
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Q107
CHEMISTRY
Unit 19: Biomolecules
Sucrose on hydrolysis gives:
↻ Repeated question — also appeared in
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- A. α-D-Glucose + β-D-Fructose
- B. β-D-Fructose + β-D-Fructose
- C. β-D-Glucose + β-D-Fructose
- D. α-D-Glucose + α-D-Glucose
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Q108
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is not correct about carbon monoxide?
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- A. The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.
- B. It is produced due to incomplete combustion.
- C. It forms carboxyhaemoglobin.
- D. It reduces oxygen carrying ability of blood.
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Q109
CHEMISTRY
Unit 5: Solutions
The mixture which shows positive deviation from Raoult's law is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Acetone + Chloroform
- B. Chloroethane + Bromoethane
- C. Ethanol + Acetone
- D. Benzene + Toluene
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Q110
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Identify compound X in the following sequence of reactions:
Toluene → (Cl₂/hν) → X → (H₂O, 373 K) → CHO (benzaldehyde)
- A. C₆H₅CHCl₂ (benzal chloride)
- B. C₆H₅CCl₃ (benzotrichloride)
- C. C₆H₄Cl–CH₃ (chlorotoluene)
- D. C₆H₅CH₂Cl (benzyl chloride)
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Q111
CHEMISTRY
Unit 5: Solutions
The freezing point depression constant (Kf) of benzene is 5.12 K kg mol⁻¹. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off up to two decimal places):
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 0.40 K
- B. 0.60 K
- C. 0.20 K
- D. 0.80 K
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Q112
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a cationic detergent?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Cetyltrimethyl ammonium bromide
- B. Sodium dodecylbenzene sulphonate
- C. Sodium lauryl sulphate
- D. Sodium stearate
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Q113
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
Paper chromatography is an example of:
↻ Repeated question — also appeared in
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- A. Thin layer chromatography
- B. Column chromatography
- C. Adsorption chromatography
- D. Partition chromatography
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Q114
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the correct statement from the following:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Vapour phase refining is carried out for Nickel by Van Arkel method.
- B. Pig iron can be moulded into a variety of shapes.
- C. Wrought iron is impure iron with 4% carbon.
- D. Blister copper has blistered appearance due to evolution of CO₂.
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Q115
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
What is the change in oxidation number of carbon in the following reaction?
CH₄(g) + 4Cl₂(g) → CCl₄(l) + 4HCl(g)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. –4 to +4
- B. 0 to –4
- C. +4 to +4
- D. 0 to +4
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Q116
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Elimination reaction of 2-Bromo-pentane to form pent-2-ene is:
(a) β-Elimination reaction
(b) Follows Zaitsev rule
(c) Dehydrohalogenation reaction
(d) Dehydration reaction
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (b), (c), (d)
- B. (a), (b), (d)
- C. (a), (b), (c)
- D. (a), (c), (d)
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Q117
CHEMISTRY
Unit 4: Chemical Thermodynamics
Hydrolysis of sucrose is given by the following reaction:
Sucrose + H₂O ⇌ Glucose + Fructose
If the equilibrium constant (Kc) is 2 × 10¹³ at 300 K, the value of ΔrG° at the same temperature will be:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 8.314 J mol⁻¹ K⁻¹ × 300 K × ln(3 × 10¹³)
- B. –8.314 J mol⁻¹ K⁻¹ × 300 K × ln(4 × 10¹³)
- C. –8.314 J mol⁻¹ K⁻¹ × 300 K × ln(2 × 10¹³)
- D. 8.314 J mol⁻¹ K⁻¹ × 300 K × ln(2 × 10¹³)
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Q117
CHEMISTRY
Unit 4: Chemical Thermodynamics
Hydrolysis of sucrose is given by the following reaction.
Sucrose + H₂O → Glucose + Fructose
If the equilibrium constant (K_C) is 2 × 10¹³ at 300 K, the value of ΔrG° at the same temperature will be:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 8.314 J mol⁻¹ K⁻¹ × 300 K × ln(3 × 10¹³)
- B. –8.314 J mol⁻¹ K⁻¹ × 300 K × ln(4 × 10¹³)
- C. –8.314 J mol⁻¹ K⁻¹ × 300 K × ln(2 × 10¹³)
- D. 8.314 J mol⁻¹ K⁻¹ × 300 K × ln(2 × 10¹³)
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Q118
CHEMISTRY
Unit 10: p-Block Elements
Match the following:
Oxide — Nature
(a) CO — (i) Basic
(b) BaO — (ii) Neutral
(c) Al₂O₃ — (iii) Acidic
(d) Cl₂O₇ — (iv) Amphoteric
Which of the following is the correct option?
↻ Repeated question — also appeared in
2020 (1 set)
- A. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- B. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- C. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- D. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
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Q119
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Identify a molecule which does not exist.
↻ Repeated question — also appeared in
2020 (5 sets)
- A. C₂
- B. O₂
- C. He₂
- D. Li₂
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Q119
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Identify a molecule which does not exist.
↻ Repeated question — also appeared in
2020 (5 sets)
- A. C₂
- B. O₂
- C. He₂
- D. Li₂
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Q120
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
The number of Faradays (F) required to produce 20 g of calcium from molten CaCl₂ (Atomic mass of Ca = 40 g mol⁻¹) is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 3
- B. 4
- C. 1
- D. 2
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Q120
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
The number of Faradays (F) required to produce 20 g of calcium from molten CaCl₂ (Atomic mass of Ca = 40 g mol⁻¹) is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 3
- B. 4
- C. 1
- D. 2
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Q121
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Urea reacts with water to form A which will decompose to form B. B when passed through Cu²⁺ (aq), deep blue colour solution C is formed. What is the formula of C from the following?
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Cu(OH)₂
- B. CuCO₃·Cu(OH)₂
- C. CuSO₄
- D. [Cu(NH₃)₄]²⁺
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Q122
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
↻ Repeated question — also appeared in
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- A. Tert. butyl alcohol
- B. Isobutyl alcohol
- C. Isopropyl alcohol
- D. Sec. butyl alcohol
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Q123
CHEMISTRY
Unit 2: Atomic Structure
The number of protons, neutrons and electrons in ¹⁷⁵₇₁Lu, respectively, are:
↻ Repeated question — also appeared in
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- A. 71, 71 and 104
- B. 175, 104 and 71
- C. 71, 104 and 71
- D. 104, 71 and 71
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Q124
CHEMISTRY
Unit 15: Hydrocarbons
Which of the following alkane cannot be made in good yield by Wurtz reaction?
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- A. n-Heptane
- B. n-Butane
- C. n-Hexane
- D. 2,3-Dimethylbutane
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Q125
CHEMISTRY
Unit 5: Solutions
HCl was passed through a solution of CaCl₂, MgCl₂ and NaCl. Which of the following compound(s) crystallise(s)?
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2020 (2 sets)
- A. Only MgCl₂
- B. NaCl, MgCl₂ and CaCl₂
- C. Both MgCl₂ and CaCl₂
- D. Only NaCl
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Q126
CHEMISTRY
Unit 5: Solutions
Measuring Zeta potential is useful in determining which property of colloidal solution?
↻ Repeated question — also appeared in
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- A. Stability of the colloidal particles
- B. Size of the colloidal particles
- C. Viscosity
- D. Solubility
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Q127
CHEMISTRY
Unit 6: Equilibrium
Find out the solubility of Ni(OH)₂ in 0.1 M NaOH. Given that the ionic product of Ni(OH)₂ is 2 × 10⁻¹⁵.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 1 × 10⁻¹³ M
- B. 1 × 10⁸ M
- C. 2 × 10⁻¹³ M
- D. 2 × 10⁻⁸ M
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Q128
CHEMISTRY
Unit 4: Chemical Thermodynamics
For the reaction, 2Cl(g) → Cl₂(g), the correct option is:
↻ Repeated question — also appeared in
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- A. ΔrH < 0 and ΔrS > 0
- B. ΔrH < 0 and ΔrS < 0
- C. ΔrH > 0 and ΔrS > 0
- D. ΔrH > 0 and ΔrS < 0
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Q129
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin only magnetic moment of Cr²⁺ ion is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 5.92 BM
- B. 2.84 BM
- C. 3.87 BM
- D. 4.90 BM
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Q130
CHEMISTRY
Unit 10: p-Block Elements
Identify the correct statements from the following:
(a) CO₂(g) is used as refrigerant for ice-cream and frozen food.
(b) The structure of C₆₀ contains twelve six carbon rings and twenty five carbon rings.
(c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(d) CO is colourless and odourless gas.
↻ Repeated question — also appeared in
2020 (5 sets)
- A. (b) and (c) only
- B. (c) and (d) only
- C. (a), (b) and (c) only
- D. (a) and (c) only
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Q131
CHEMISTRY
Unit 11: d- and f-Block Elements
The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.
↻ Repeated question — also appeared in
2020 (1 set)
- A. Calcium
- B. Potassium
- C. Iron
- D. Copper
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Q132
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following set of molecules will have zero dipole moment?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
- B. Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
- C. Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
- D. Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
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Q133
CHEMISTRY
Unit 4: Chemical Thermodynamics
The correct option for free expansion of an ideal gas under adiabatic condition is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. q < 0, T = 0 and w = 0
- B. q > 0, T > 0 and w > 0
- C. q = 0, T = 0 and w = 0
- D. q = 0, T < 0 and w > 0
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Q133
CHEMISTRY
Unit 4: Chemical Thermodynamics
The correct option for free expansion of an ideal gas under adiabatic condition is
↻ Repeated question — also appeared in
2020 (8 sets)
- A. q < 0, T = 0 and w = 0
- B. q > 0, T > 0 and w > 0
- C. q = 0, T = 0 and w = 0
- D. q = 0, T < 0 and w > 0
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Q134
CHEMISTRY
Unit 12: Coordination Compounds
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. F⁻ < SCN⁻ < C₂O₄²⁻ < CN⁻
- B. CN⁻ < C₂O₄²⁻ < SCN⁻ < F⁻
- C. SCN⁻ < F⁻ < C₂O₄²⁻ < CN⁻
- D. SCN⁻ < F⁻ < CN⁻ < C₂O₄²⁻
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Q134
CHEMISTRY
Unit 12: Coordination Compounds
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. F⁻ < SCN⁻ < C₂O₄²⁻ < CN⁻
- B. CN⁻ < C₂O₄²⁻ < SCN⁻ < F⁻
- C. SCN⁻ < F⁻ < C₂O₄²⁻ < CN⁻
- D. SCN⁻ < F⁻ < CN⁻ < C₂O₄²⁻
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Q135
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. –R effect of –CH₃ groups
- B. Hyperconjugation
- C. –I effect of –CH₃ groups
- D. +R effect of –CH₃ groups
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Q135
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. –R effect of –CH₃ groups
- B. Hyperconjugation
- C. –I effect of –CH₃ groups
- D. +R effect of –CH₃ groups
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Q136
PHYSICS
Unit 10: Oscillations and Waves
In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 536 Hz
- B. 537 Hz
- C. 523 Hz
- D. 524 Hz
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Q136
PHYSICS
Unit 10: Oscillations and Waves
In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 536 Hz
- B. 537 Hz
- C. 523 Hz
- D. 524 Hz
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Q137
PHYSICS
Unit 19: Electronic Devices
The increase in the width of the depletion region in a p-n junction diode is due to:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Both forward bias and reverse bias
- B. Increase in forward current
- C. Forward bias only
- D. Reverse bias only
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Q138
PHYSICS
Unit 7: Properties of Solids and Liquids
The quantities of heat required to raise the temperature of two solid copper spheres of radii r₁ and r₂ (r₁ = 1.5 r₂) through 1 K are in the ratio:
↻ Repeated question — also appeared in
2020 (3 sets)
- A. 3/2
- B. 5/3
- C. 27/8
- D. 9/4
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Q139
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is π/3. If instead C is removed from the circuit, the phase difference is again π/3 between current and voltage. The power factor of the circuit is
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 1.0
- B. –1.0
- C. zero
- D. 0.5
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Q140
PHYSICS
Unit 2: Kinematics
A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is: (g = 10 m/s²)
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 320 m
- B. 300 m
- C. 360 m
- D. 340 m
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Q141
PHYSICS
Unit 16: Optics
In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Four times
- B. One-fourth
- C. Double
- D. Half
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Q143
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is: (μ₀ = 4π × 10⁻⁷ T m A⁻¹)
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 6.28 × 10⁻⁵ T
- B. 3.14 × 10⁻⁵ T
- C. 6.28 × 10⁻⁴ T
- D. 3.14 × 10⁻⁴ T
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Q144
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. One-fourth
- B. Zero
- C. Doubled
- D. Four times
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Q145
PHYSICS
Unit 1: Physics and Measurement
A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is:
↻ Repeated question — also appeared in
2020 (1 set)
- A. 0.5 mm
- B. 1.0 mm
- C. 0.01 mm
- D. 0.25 mm
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Q146
PHYSICS
Unit 3: Laws of Motion
Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string. The string passes over a frictionless pulley. The acceleration of the system in terms of acceleration due to gravity (g) is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. g/5
- B. g/10
- C. g
- D. g/2
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Q147
PHYSICS
Unit 19: Electronic Devices
For transistor action, which of the following statements is correct?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Both emitter junction as well as the collector junction are forward biased.
- B. The base region must be very thin and lightly doped.
- C. Base, emitter and collector regions should have same doping concentrations.
- D. Base, emitter and collector regions should have same size.
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Q148
PHYSICS
Unit 18: Atoms and Nuclei
For which one of the following, Bohr model is not valid?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Deuteron atom
- B. Singly ionised neon atom (Ne⁺)
- C. Hydrogen atom
- D. Singly ionised helium atom (He⁺)
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Q148
PHYSICS
Unit 18: Atoms and Nuclei
For which one of the following, Bohr model is not valid?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Deuteron atom
- B. Singly ionised neon atom (Ne⁺)
- C. Hydrogen atom
- D. Singly ionised helium atom (He⁺)
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Q149
PHYSICS
Unit 7: Properties of Solids and Liquids
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 10.0 g
- B. 20.0 g
- C. 2.5 g
- D. 5.0 g
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Q149
PHYSICS
Unit 7: Properties of Solids and Liquids
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 10.0 g
- B. 20.0 g
- C. 2.5 g
- D. 5.0 g
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Q150
PHYSICS
Unit 15: Electromagnetic Waves
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: (c = speed of electromagnetic waves)
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 1 : c
- B. 1 : c²
- C. c : 1
- D. 1 : 1
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Q150
PHYSICS
Unit 15: Electromagnetic Waves
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: (c = speed of electromagnetic waves)
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 1 : c
- B. 1 : c²
- C. c : 1
- D. 1 : 1
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Q151
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m⁻¹. The permeability of the material of the rod is: (μ₀ = 4π × 10⁻⁷ T m A⁻¹)
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 2.4 × 10⁻⁵ T m A⁻¹
- B. 2.4 × 10⁻⁷ T m A⁻¹
- C. 2.4 × 10⁻⁴ T m A⁻¹
- D. 8.0 × 10⁻⁵ T m A⁻¹
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Q151
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m⁻¹. The permeability of the material of the rod is: (μ₀ = 4π × 10⁻⁷ T m A⁻¹)
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 2.4 × 10⁻⁵ T m A⁻¹
- B. 2.4 × 10⁻⁷ T m A⁻¹
- C. 2.4 × 10⁻⁴ T m A⁻¹
- D. 8.0 × 10⁻⁵ T m A⁻¹
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Q152
PHYSICS
Unit 16: Optics
The Brewster's angle iᵦ for an interface should be:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 45° < iᵦ < 90°
- B. iᵦ = 90°
- C. 0° < iᵦ < 30°
- D. 30° < iᵦ < 45°
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Q153
PHYSICS
Unit 10: Oscillations and Waves
The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. π/2 rad
- B. zero
- C. π rad
- D. 3π/2 rad
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Q154
PHYSICS
Unit 5: Rotational Motion
Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The centre of mass of the system from the 5 kg particle is nearly at a distance of:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 67 cm
- B. 80 cm
- C. 33 cm
- D. 50 cm
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Q155
PHYSICS
Unit 11: Electrostatics
A spherical conductor of radius 10 cm has a charge of 3.2 × 10⁻⁷ C distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere? (1/4πε₀ = 9 × 10⁹ N m² C⁻²)
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 1.28 × 10⁶ N/C
- B. 1.28 × 10⁷ N/C
- C. 1.28 × 10⁴ N/C
- D. 1.28 × 10⁵ N/C
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Q156
PHYSICS
Unit 16: Optics
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of a telescope whose objective has a diameter of 2 m is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 7.32 × 10⁻⁷ rad
- B. 6.00 × 10⁻⁷ rad
- C. 3.66 × 10⁻⁷ rad
- D. 1.83 × 10⁻⁷ rad
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Q157
PHYSICS
Unit 12: Current Electricity
A charged particle having drift velocity of 7.5 × 10⁻⁴ m s⁻¹ in an electric field of 3 × 10⁻¹⁰ V m⁻¹, has a mobility in m² V⁻¹ s⁻¹ of:
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 2.5 × 10⁻⁶
- B. 2.25 × 10⁻¹⁵
- C. 2.25 × 10¹⁵
- D. 2.5 × 10⁶
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Q158
PHYSICS
Unit 1: Physics and Measurement
Taking into account significant figures, what is the value of 9.99 m – 0.0099 m?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 9.980 m
- B. 9.9 m
- C. 9.9801 m
- D. 9.98 m
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Q159
PHYSICS
Unit 18: Atoms and Nuclei
The energy equivalent of 0.5 g of a substance is:
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 1.5 × 10¹³ J
- B. 0.5 × 10¹³ J
- C. 4.5 × 10¹⁶ J
- D. 4.5 × 10¹³ J
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Q160
PHYSICS
Unit 18: Atoms and Nuclei
When a uranium isotope ²³⁵₉₂U is bombarded with a neutron, it generates ⁸⁹₃₆Kr, three neutrons and:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. ¹⁰¹₃₆Kr
- B. ¹⁰³₃₆Kr
- C. ¹⁴⁴₅₆Ba
- D. ⁹¹₄₀Zr
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Q161
PHYSICS
Unit 11: Electrostatics
A short electric dipole has a dipole moment of 16 × 10⁻⁹ C m. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of 60° with the dipole axis is: (1/4πε₀ = 9 × 10⁹ N m²/C²)
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 400 V
- B. zero
- C. 50 V
- D. 200 V
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Q162
PHYSICS
Unit 9: Kinetic Theory of Gases
A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C. Its density is: (R = 8.3 J mol⁻¹ K⁻¹)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 0.1 kg/m³
- B. 0.02 kg/m³
- C. 0.5 kg/m³
- D. 0.2 kg/m³
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Q163
PHYSICS
Unit 9: Kinetic Theory of Gases
The average thermal energy for a mono-atomic ideal gas is: (k_B is Boltzmann constant and T is absolute temperature)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. (5/2) k_B T
- B. (7/2) k_B T
- C. (1/2) k_B T
- D. (3/2) k_B T
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Q165
PHYSICS
Unit 19: Electronic Devices
For the logic circuit shown, the truth table is:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. A B Y 0 0 1 0 1 1 1 0 1 1 1 0
- B. A B Y 0 0 1 0 1 0 1 0 0 1 1 0
- C. A B Y 0 0 0 0 1 0 1 0 0 1 1 1
- D. A B Y 0 0 0 0 1 1 1 0 1 1 1 1
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Q166
PHYSICS
Unit 12: Current Electricity
A resistance wire connected in the left gap of a metre bridge balances a 10 Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length of 1 Ω of the resistance wire is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 1.5 × 10⁻¹ m
- B. 1.5 × 10⁻² m
- C. 1.0 × 10⁻² m
- D. 1.0 × 10⁻¹ m
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Q166
PHYSICS
Unit 12: Current Electricity
A resistance wire connected in the left gap of a metre bridge balances a 10 Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3 : 2. If the length of the resistance wire is 1.5 m, then the length of 1 Ω of the resistance wire is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 1.5 × 10⁻¹ m
- B. 1.5 × 10⁻² m
- C. 1.0 × 10⁻² m
- D. 1.0 × 10⁻¹ m
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Q167
PHYSICS
Unit 5: Rotational Motion
Find the torque about the origin when a force of 3ĵ N acts on a particle whose position vector is 2k̂ m.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 6î N m
- B. −6k̂ N m
- C. −6î N m
- D. 6ĵ N m
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Q167
PHYSICS
Unit 5: Rotational Motion
Find the torque about the origin when a force of 3ĵ N acts on a particle whose position vector is 2k̂ m.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 6î N·m
- B. −6k̂ N·m
- C. −6î N·m
- D. 6ĵ N·m
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Q168
PHYSICS
Unit 7: Properties of Solids and Liquids
A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to L₁ when mass M is suspended from its free end. The expression for Young's modulus is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. MgL / (AL₁)
- B. MgL / (A(L₁ − L))
- C. MgL₁ / (AL)
- D. Mg(L₁ − L) / (AL)
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Q168
PHYSICS
Unit 7: Properties of Solids and Liquids
A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to L₁ when mass M is suspended from its free end. The expression for Young's modulus is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. MgL / (AL₁)
- B. MgL / (A(L₁ − L))
- C. MgL₁ / (AL)
- D. Mg(L₁ − L) / (AL)
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Q169
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
A 40 μF capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly:
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 2.5 A
- B. 25.1 A
- C. 1.7 A
- D. 2.05 A
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Q170
PHYSICS
Unit 6: Gravitation
A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 30 N
- B. 24 N
- C. 48 N
- D. 32 N
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Q171
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is 1.227 × 10⁻² nm, the potential difference is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 10³ V
- B. 10⁴ V
- C. 10 V
- D. 10² V
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Q172
PHYSICS
Unit 16: Optics
A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ, then the angle of incidence is nearly equal to:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. μA
- B. A / (2μ)
- C. A / 2
- D. 2A / μ
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Q173
PHYSICS
Unit 19: Electronic Devices
The solids which have the negative temperature coefficient of resistance are:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Semiconductors only
- B. Insulators and semiconductors
- C. Metals
- D. Insulators only
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Q174
PHYSICS
Unit 11: Electrostatics
In a certain region of space with volume 0.2 m³, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 1 N/C
- B. 5 N/C
- C. Zero
- D. 0.5 N/C
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Q175
PHYSICS
Unit 15: Electromagnetic Waves
Light with an average flux of 20 W/cm² falls on a non-reflecting surface at normal incidence having surface area 20 cm². The energy received by the surface during time span of 1 minute is:
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 24 × 10³ J
- B. 48 × 10³ J
- C. 10 × 10³ J
- D. 12 × 10³ J
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Q176
PHYSICS
Unit 11: Electrostatics
The capacitance of a parallel plate capacitor with air as medium is 6 μF. With the introduction of a dielectric medium, the capacitance becomes 30 μF. The permittivity of the medium is: (ε₀ = 8.85 × 10⁻¹² C² N⁻¹ m⁻²)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 0.44 × 10⁻¹⁰ C² N⁻¹ m⁻²
- B. 5.00 C² N⁻¹ m⁻²
- C. 0.44 × 10⁻¹³ C² N⁻¹ m⁻²
- D. 1.77 × 10⁻¹² C² N⁻¹ m⁻²
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Q177
PHYSICS
Unit 18: Atoms and Nuclei
The energy required to break one bond in DNA is 10⁻²⁰ J. This value in eV is nearly:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 0.06
- B. 0.006
- C. 6
- D. 0.6
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Q178
PHYSICS
Unit 1: Physics and Measurement
Dimensions of stress are:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. [ML⁰T⁻²]
- B. [ML⁻¹T⁻²]
- C. [MLT⁻²]
- D. [ML²T⁻²]
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Q179
PHYSICS
Unit 8: Thermodynamics
Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Isochoric
- B. Isobaric
- C. Isothermal
- D. Adiabatic
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Q180
PHYSICS
Unit 9: Kinetic Theory of Gases
The mean free path for a gas, with molecular diameter d and number density n can be expressed as:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 1 / (√2 π n d²)
- B. 1 / (√2 π² n d²)
- C. 1 / (√2 π n d)
- D. 1 / (√2 π² n d)
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