Q1
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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Q2
BIOLOGY
Unit 9: Biotechnology and Its Applications
The sequence that controls the copy number of the linked DNA in the vector, is termed
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2020 (7 sets)
- A. Palindromic sequence
- B. Recognition site
- C. Selectable marker
- D. Ori site
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Q3
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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Q4
BIOLOGY
Unit 8: Biology and Human Welfare
Identify the wrong statement with reference to immunity.
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2020 (4 sets)
- A. Active immunity is quick and gives full response.
- B. Foetus receives some antibodies from mother, it is an example for passive immunity.
- C. When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called “Active immunity”.
- D. When ready-made antibodies are directly given, it is called “Passive immunity”.
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Q5
BIOLOGY
Unit 7: Genetics and Evolution
Experimental verification of the chromosomal theory of inheritance was done by
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2020 (8 sets)
- A. Boveri
- B. Morgan
- C. Mendel
- D. Sutton
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Q6
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
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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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Q7
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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Q8
BIOLOGY
Unit 7: Genetics and Evolution
Name the enzyme that facilitates opening of DNA helix during transcription.
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2020 (6 sets)
- A. DNA polymerase
- B. RNA polymerase
- C. DNA ligase
- D. DNA helicase
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Q9
BIOLOGY
Unit 6: Reproduction
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
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2020 (9 sets)
- A. ICSI and ZIFT
- B. GIFT and ICSI
- C. ZIFT and IUT
- D. GIFT and ZIFT
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Q9
BIOLOGY
Unit 6: Reproduction
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
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2020 (9 sets)
- A. ICSI and ZIFT
- B. GIFT and ICSI
- C. ZIFT and IUT
- D. GIFT and ZIFT
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Q10
CHEMISTRY
Unit 19: Biomolecules
Identify the basic amino acid from the following.
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2020 (5 sets)
- A. Lysine
- B. Valine
- C. Tyrosine
- D. Glutamic Acid
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Q11
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to transport of oxygen
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2020 (9 sets)
- A. Higher H+ conc. 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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Q11
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to transport of oxygen
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Higher H+ conc. 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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Q12
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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Q12
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Floridean starch has structure similar to
- A. Mannitol and algin
- B. Laminarin and cellulose
- C. Starch and cellulose
- D. Amylopectin and glycogen
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Q13
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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Q14
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option: (a) Pituitary gland, (b) Thyroid gland, (c) Adrenal gland, (d) Pancreas. Column-II: (i) Grave’s disease, (ii) Diabetes mellitus, (iii) Diabetes insipidus, (iv) Addison’s disease.
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- B. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
- C. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- D. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
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Q15
BIOLOGY
Unit 5: Human Physiology
Select the option including all sexually transmitted diseases.
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2020 (4 sets)
- A. AIDS, Malaria, Filaria
- B. Cancer, AIDS, Syphilis
- C. Gonorrhoea, Syphilis, Genital herpes
- D. Gonorrhoea, Malaria, Genital herpes
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Q16
BIOLOGY
Unit 9: Biotechnology and Its Applications
Choose the correct pair from the following
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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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Q17
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Ray florets have
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2020 (6 sets)
- A. Hypogynous ovary
- B. Half inferior ovary
- C. Inferior ovary
- D. Superior ovary
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Q18
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the organism with its use in biotechnology: (a) Bacillus thuringiensis, (b) Thermus aquaticus, (c) Agrobacterium tumefaciens, (d) Salmonella typhimurium.
↻ Repeated question — also appeared in
2020 (1 set)
- A. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- 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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Q19
BIOLOGY
Unit 4: Plant Physiology
The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are
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2020 (7 sets)
- A. Ammonia and oxygen
- B. Ammonia and hydrogen
- C. Ammonia alone
- D. Nitrate alone
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Q20
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.
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2020 (8 sets)
- A. Ethylene
- B. Abscisic acid
- C. Cytokinin
- D. Gibberellin
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Q21
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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Q22
BIOLOGY
Unit 4: Plant Physiology
The process of growth is maximum during
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Senescence
- B. Dormancy
- C. Log phase
- D. Lag phase
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Q23
BIOLOGY
Unit 1: Diversity in Living World
Bilaterally symmetrical and acoelomate animals are exemplified by
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2020 (8 sets)
- A. Aschelminthes
- B. Annelida
- C. Ctenophora
- D. Platyhelminthes
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Q24
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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Q25
BIOLOGY
Unit 5: Human Physiology
Match the following columns and select the correct option: (a) Floating Ribs, (b) Acromion, (c) Scapula, (d) Glenoid cavity. Column-II: (i) Located between second and seventh ribs, (ii) Head of the Humerus, (iii) Clavicle, (iv) Do not connect with the sternum.
↻ Repeated question — also appeared in
2020 (1 set)
- A. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
- B. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
- C. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
- D. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
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Q26
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the wrong statement with regard to Restriction Enzymes.
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2020 (8 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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Q26
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the wrong statement with regard to Restriction Enzymes.
↻ Repeated question — also appeared in
2020 (8 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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Q27
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option: (a) Gregarious, polyphagous pest, (b) Adult with radial symmetry and larva with bilateral symmetry, (c) Book lungs, (d) Bioluminescence.
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2020 (1 set)
- 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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Q27
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
Column-I: (a) Gregarious, polyphagous pest (b) Adult with radial symmetry and larva with bilateral symmetry (c) Book lungs (d) Bioluminescence
Column-II: (i) Asterias (ii) Scorpion (iii) Ctenoplana (iv) Locusta
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (1) (iii) (ii) (i) (iv)
- B. (2) (ii) (i) (iii) (iv)
- C. (3) (i) (iii) (ii) (iv)
- D. (4) (iv) (i) (ii) (iii)
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Q28
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
If the head of cockroach is removed, it may live for few days because
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2020 (7 sets)
- A. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
- B. the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.
- C. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
- D. the cockroach does not have nervous system.
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Q29
BIOLOGY
Unit 10: Ecology and Environment
Which of the following regions of the globe exhibits highest species diversity?
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2020 (8 sets)
- A. Himalayas
- B. Amazon forests
- C. Western Ghats of India
- D. Madagascar
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Q30
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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2020 (8 sets)
- A. Golgi bodies
- B. Polysomes
- C. Endoplasmic reticulum
- D. Peroxisomes
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Q31
BIOLOGY
Unit 1: Diversity in Living World
Which of the following pairs is of unicellular algae?
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2020 (8 sets)
- A. Anabaena and Volvox
- B. Chlorella and Spirulina
- C. Laminaria and Sargassum
- D. Gelidium and Gracilaria
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Q32
CHEMISTRY
Unit 19: Biomolecules
Which one of the following is the most abundant protein in the animals?
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2020 (1 set)
- A. Lectin
- B. Insulin
- C. Haemoglobin
- D. Collagen
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Q33
BIOLOGY
Unit 3: Cell Structure and Function
Dissolution of the synaptonemal complex occurs during
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Diplotene
- B. Leptotene
- C. Pachytene
- D. Zygotene
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Q34
BIOLOGY
Unit 7: Genetics and Evolution
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
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2020 (7 sets)
- A. 14
- B. 8
- C. 4
- D. 2
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Q35
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Cuboidal epithelium with brush border of microvilli is found in
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Proximal convoluted tubule of nephron
- B. Eustachian tube
- C. Lining of intestine
- D. Ducts of salivary gland
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Q36
BIOLOGY
Unit 3: Cell Structure and Function
Match the following with respect to meiosis (a) Zygotene (b) Pachytene (c) Diplotene (d) Diakinesis
- A. (1) (i) (ii) (iv) (iii)
- B. (2) (ii) (iv) (iii) (i)
- C. (3) (iii) (iv) (i) (ii)
- D. (4) (iv) (iii) (ii) (i)
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Q37
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements about inclusion bodies is incorrect?
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2020 (8 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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Q38
BIOLOGY
Unit 5: Human Physiology
Which of the following would help in prevention of diuresis?
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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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Q39
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The transverse section of a plant shows 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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Q40
CHEMISTRY
Unit 19: Biomolecules
Which of the following statements is correct?
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2020 (2 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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Q41
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the following columns and select the correct option.
Column-I: (a) Bt cotton (b) Adenosine deaminase deficiency (c) RNAi (d) PCR
Column-II: (i) Gene therapy (ii) Cellular defence (iii) Detection of HIV infection (iv) Bacillus thuringiensis
↻ Repeated question — also appeared in
2020 (1 set)
- A. (1) (ii) (iii) (iv) (i)
- B. (2) (i) (ii) (iii) (iv)
- C. (3) (iv) (i) (ii) (iii)
- D. (4) (iii) (ii) (i) (iv)
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Q42
BIOLOGY
Unit 7: Genetics and Evolution
Flippers of Penguins and Dolphins are examples of
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Industrial melanism
- B. Natural selection
- C. Adaptive radiation
- D. Convergent evolution
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Q42
BIOLOGY
Unit 7: Genetics and Evolution
Flippers of Penguins and Dolphins are examples of
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Industrial melanism
- B. Natural selection
- C. Adaptive radiation
- D. Convergent evolution
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Q43
BIOLOGY
Unit 4: Plant Physiology
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of
↻ Repeated question — also appeared in
2020 (8 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 and 1 molecule of 2-C compound
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Q44
BIOLOGY
Unit 8: Biology and Human Welfare
The infectious stage of Plasmodium that enters the human body is
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Female gametocytes
- B. Male gametocytes
- C. Trophozoites
- D. Sporozoites
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Q45
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the incorrect statement.
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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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Q46
BIOLOGY
Unit 1: Diversity in Living World
Which of the following is correct about viroids?
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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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Q47
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. (1) (ii) (i) (iii) (iv)
- B. (2) (iv) (i) (ii) (iii)
- C. (3) (i) (iii) (ii) (iv)
- D. (4) (iii) (iv) (i) (ii)
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Q48
BIOLOGY
Unit 7: Genetics and Evolution
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
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2020 (7 sets)
- A. When IA and IB are present together, they express same type of sugar.
- B. Allele ‘i’ does not produce any sugar.
- C. The gene (I) has three alleles.
- D. A person will have only two of the three alleles.
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Q49
BIOLOGY
Unit 10: Ecology and Environment
According to Robert May, the global species diversity is about
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 50 million
- B. 7 million
- C. 1.5 million
- D. 20 million
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Q50
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is not an attribute of a population?
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2020 (8 sets)
- A. Mortality
- B. Species interaction
- C. Sex ratio
- D. Natality
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Q51
BIOLOGY
Unit 6: Reproduction
In water hyacinth and water lily, pollination takes place by :
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2020 (6 sets)
- A. Wind and water
- B. Insects and water
- C. Insects or wind
- D. Water currents only
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Q52
BIOLOGY
Unit 5: Human Physiology
The QRS complex in a standard ECG represents
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Depolarisation of ventricles
- B. Repolarisation of ventricles
- C. Repolarisation of auricles
- D. Depolarisation of auricles
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Q53
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match
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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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Q54
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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Q55
BIOLOGY
Unit 3: Cell Structure and Function
Match the following:
(a) Inhibitor of catalytic activity (i) Ricin
(b) Possess peptide bonds (ii) Malonate
(c) Cell wall material in fungi (iii) Chitin
(d) Secondary metabolite (iv) Collagen
- A. (1) (iii) (iv) (i) (ii)
- B. (2) (ii) (iii) (i) (iv)
- C. (3) (ii) (iv) (iii) (i)
- D. (4) (iii) (i) (iv) (ii)
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Q56
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 (7 sets)
- A. (b), (c) and (d)
- B. only (d)
- C. only (a)
- D. (a) and (c)
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Q57
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 (8 sets)
- A. S phase
- B. G2 phase
- C. M phase
- D. G1 phase
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Q57
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 (8 sets)
- A. S phase
- B. G2 phase
- C. M phase
- D. G1 phase
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Q58
BIOLOGY
Unit 3: Cell Structure and Function
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their
- A. Defence action
- B. Effect on reproduction
- C. Nutritive value
- D. Growth response
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Q58
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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Q59
BIOLOGY
Unit 6: Reproduction
Meiotic division of the secondary oocyte is completed
↻ Repeated question — also appeared in
2020 (9 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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Q59
BIOLOGY
Unit 6: Reproduction
Meiotic division of the secondary oocyte is completed
↻ Repeated question — also appeared in
2020 (9 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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Q60
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following statements is not correct?
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2020 (3 sets)
- A. The functional insulin has A and B chains linked together by hydrogen bonds.
- B. Genetically engineered insulin is produced in E. Coli.
- C. In man insulin is synthesised as a proinsulin
- D. The proinsulin has an extra peptide called C-peptide.
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Q61
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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Q62
BIOLOGY
Unit 1: Diversity in Living World
Strobili or cones are found in
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Marchantia
- B. Equisetum
- C. Salvinia
- D. Pteris
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Q63
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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Q64
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?
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2020 (5 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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Q65
BIOLOGY
Unit 10: Ecology and Environment
Match the trophic levels with their correct species examples in grassland ecosystem.
(a) Fourth trophic level (i) Crow
(b) Second trophic level (ii) Vulture
(c) First trophic level (iii) Rabbit
(d) Third trophic level (iv) Grass
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2020 (4 sets)
- A. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- B. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
- C. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
- D. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
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Q72
CHEMISTRY
Unit 19: Biomolecules
Identify the substances having glycosidic bond and peptide bond, respectively in their structure
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Cellulose, lecithin
- B. Inulin, insulin
- C. Chitin, cholesterol
- D. Glycerol, trypsin
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Q72
CHEMISTRY
Unit 19: Biomolecules
Identify the substances having glycosidic bond and peptide bond, respectively in their structure
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Cellulose, lecithin
- B. Inulin, insulin
- C. Chitin, cholesterol
- D. Glycerol, trypsin
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Q91
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. (1) 400 V
- B. (2) zero
- C. (3) 50 V
- D. (4) 200 V
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Q92
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) 1.0
- B. (2) -1.0
- C. (3) zero
- D. (4) 0.5
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Q93
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. (1) one-fourth
- B. (2) zero
- C. (3) doubled
- D. (4) four times
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Q94
PHYSICS
Unit 1: Physics and Measurement
Dimensions of stress are:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. (1) [ML⁰T⁻²]
- B. (2) [ML⁻¹T⁻²]
- C. (3) [MLT⁻²]
- D. (4) [ML²T⁻²]
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Q95
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. (1) 10³ V
- B. (2) 10⁴ V
- C. (3) 10 V
- D. (4) 10² V
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Q96
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. (1) 0.44 × 10⁻¹⁰ C² N⁻¹ m⁻²
- B. (2) 5.00 C² N⁻¹ m⁻²
- C. (3) 0.44 × 10⁻¹³ C² N⁻¹ m⁻²
- D. (4) 1.77 × 10⁻¹² C² N⁻¹ m⁻²
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Q97
PHYSICS
Unit 12: Current Electricity
The solids which have the negative temperature coefficient of resistance are:
↻ Repeated question — also appeared in
2020 (1 set)
- A. (1) semiconductors only
- B. (2) insulators and semiconductors
- C. (3) metals
- D. (4) insulators only
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Q98
PHYSICS
Unit 19: Electronic Devices
For transistor action, which of the following statements is correct?
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2020 (7 sets)
- A. (1) Both emitter junction as well as the collector junction are forward biased.
- B. (2) The base region must be very thin and lightly doped.
- C. (3) Base, emitter and collector regions should have same doping concentrations.
- D. (4) Base, emitter and collector regions should have same size.
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Q99
PHYSICS
Unit 20: Experimental Skills
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:
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2020 (7 sets)
- A. (1) 0.5 mm
- B. (2) 1.0 mm
- C. (3) 0.01 mm
- D. (4) 0.25 mm
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Q99
PHYSICS
Unit 20: Experimental Skills
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 :
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2020 (7 sets)
- A. 0.5 mm
- B. 1.0 mm
- C. 0.01 mm
- D. 0.25 mm
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Q100
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 (9 sets)
- A. (1) π/2 rad
- B. (2) zero
- C. (3) π rad
- D. (4) 3π/2 rad
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Q100
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 (9 sets)
- A. π/2 rad
- B. zero
- C. π rad
- D. 3π/2 rad
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Q101
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 (9 sets)
- A. (1) 6.28 × 10⁻⁵ T
- B. (2) 3.14 × 10⁻⁵ T
- C. (3) 6.28 × 10⁻⁴ T
- D. (4) 3.14 × 10⁻⁴ T
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Q101
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 (9 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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Q102
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 (9 sets)
- A. (1) 320 m
- B. (2) 300 m
- C. (3) 360 m
- D. (4) 340 m
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Q102
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 (9 sets)
- A. 320 m
- B. 300 m
- C. 360 m
- D. 340 m
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Q103
PHYSICS
Unit 12: Current Electricity
The color code of a resistance is given below. The values of resistance and tolerance, respectively, are
↻ Repeated question — also appeared in
2020 (1 set)
- A. 4.7 kΩ, 5%
- B. 470 Ω, 5%
- C. 470 kΩ, 5%
- D. 47 kΩ, 10%
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Q104
PHYSICS
Unit 16: Optics
The Brewsters angle ib for an interface should be
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 45° < ib < 90°
- B. ib = 90°
- C. 0° < ib < 30°
- D. 30° < ib < 45°
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Q105
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/2μ
- D. 2A/μ
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Q106
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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Q107
PHYSICS
Unit 18: Atoms and Nuclei
For which one of the following, Bohr model is not valid ?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Deuteron atom
- B. Singly ionised neon atom (Ne+)
- C. Hydrogen atom
- D. Singly ionised helium atom (He+)
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Q108
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 pulley which is frictionless. 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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Q109
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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Q110
PHYSICS
Unit 18: Atoms and Nuclei
When a uranium isotope 235/92 U is bombarded with a neutron, it generates 89/36 Kr, three neutrons and :
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 101/36 Kr
- B. 103/36 Kr
- C. 144/56 Ba
- D. 91/40 Zr
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Q111
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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Q112
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 / (2^0.5 * n * π * d²)
- B. 1 / (2 * n * π * d²)
- C. 1 / (n * π * d²)
- D. 1 / (2^0.5 * n * π * d²)
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Q113
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 (7 sets)
- A. MgL/AL1
- B. MgL / (A(L1-L))
- C. MgL/AL1
- D. Mg(L1-L)/AL
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Q114
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?
↻ 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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Q115
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 (7 sets)
- A. 0.06
- B. 0.006
- C. 6
- D. 0.6
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Q116
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?
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2020 (9 sets)
- A. 30 N
- B. 24 N
- C. 48 N
- D. 32 N
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Q116
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?
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2020 (9 sets)
- A. 30 N
- B. 24 N
- C. 48 N
- D. 32 N
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Q117
PHYSICS
Unit 19: Electronic Devices
For the logic circuit shown, the truth table is:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. A=0, B=0, Y=1; A=0, B=1, Y=1; A=1, B=0, Y=1; A=1, B=1, Y=0
- B. A=0, B=0, Y=1; A=0, B=1, Y=0; A=1, B=0, Y=0; A=1, B=1, Y=0
- C. A=0, B=0, Y=0; A=0, B=1, Y=0; A=1, B=0, Y=0; A=1, B=1, Y=1
- D. A=0, B=0, Y=0; A=0, B=1, Y=1; A=1, B=0, Y=1; A=1, B=1, Y=1
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Q117
PHYSICS
Unit 19: Electronic Devices
For the logic circuit shown, the truth table is:
↻ Repeated question — also appeared in
2020 (6 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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Q118
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 :
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2020 (9 sets)
- A. four times
- B. one-fourth
- C. double
- D. half
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Q118
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 :
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2020 (9 sets)
- A. four times
- B. one-fourth
- C. double
- D. half
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Q119
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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Q119
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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Q120
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/m^3
- B. 0.02 kg/m^3
- C. 0.5 kg/m^3
- D. 0.2 kg/m^3
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Q121
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 x 10^-7 T m A^-1)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 2.4π x 10^-5 T m A^-1
- B. 2.4π x 10^-7 T m A^-1
- C. 2.4π x 10^-4 T m A^-1
- D. 8.0 x 10^-5 T m A^-1
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Q122
PHYSICS
Unit 5: Rotational Motion
Find the torque about the origin when a force of 3j N acts on a particle whose position vector is 2k m.
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2020 (7 sets)
- A. 6i Nm
- B. 6k Nm
- C. -6i Nm
- D. 6j Nm
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Q123
PHYSICS
Unit 9: Kinetic Theory of Gases
The average thermal energy for a mono-atomic gas is : (kB is Boltzmann constant and T, absolute temperature)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. (5/2) kBT
- B. (7/2) kBT
- C. (1/2) kBT
- D. (3/2) kBT
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Q124
PHYSICS
Unit 16: Optics
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is :
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 7.32 x 10^-7 rad
- B. 6.00 x 10^-7 rad
- C. 3.66 x 10^-7 rad
- D. 1.83 x 10^-7 rad
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Q125
PHYSICS
Unit 15: Electromagnetic Waves
Light with an average flux of 20 W/cm^2 falls on a non-reflecting surface at normal incidence having surface area 20 cm^2. The energy received by the surface during time span of 1 minute is :
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 24 x 10^3 J
- B. 48 x 10^3 J
- C. 10 x 10^3 J
- D. 12 x 10^3 J
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Q126
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 :
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2020 (8 sets)
- A. 1 : c
- B. 1 : c^2
- C. c : 1
- D. 1 : 1
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Q127
PHYSICS
Unit 12: Current Electricity
Which of the following graph represents the variation of resistivity (ρ) with temperature (T) for copper?
↻ Repeated question — also appeared in
2020 (1 set)
- A. Line with positive slope starting from near origin
- B. Hyperbola
- C. Exponential
- D. Constant
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Q128
PHYSICS
Unit 8: Thermodynamics
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 (2 sets)
- A. 3/2
- B. 5/3
- C. 27/8
- D. 9/4
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Q129
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 (6 sets)
- A. 1.5 x 10^-1 m
- B. 1.5 x 10^-2 m
- C. 1.0 x 10^-2 m
- D. 1.0 x 10^-1 m
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Q130
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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Q131
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 :
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2020 (4 sets)
- A. 2.5 A
- B. 25.1 A
- C. 1.7 A
- D. 2.05 A
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Q132
PHYSICS
Unit 1: Physics and Measurement
Taking into account of the significant figures, what is the value of 9.99 m – 0.0099 m?
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2020 (7 sets)
- A. 9.980 m
- B. 9.9 m
- C. 9.9801 m
- D. 9.98 m
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Q132
PHYSICS
Unit 20: Experimental Skills
Taking into account of the significant figures, what is the value of 9.99 m – 0.0099 m?
- A. 9.980 m
- B. 9.9 m
- C. 9.9801 m
- D. 9.98 m
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Q133
PHYSICS
Unit 12: Current Electricity
A charged particle having drift velocity of 7.5 x 10^-4 m s^-1 in an electric field of 3 x 10^-10 Vm^-1, has a mobility in m^2 V^-1 s^-1 of :
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 2.5 x 10^-6
- B. 2.25 x 10^-15
- C. 2.25 x 10^15
- D. 2.5 x 10^6
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Q133
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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Q134
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:
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2020 (8 sets)
- A. 536 Hz
- B. 537 Hz
- C. 523 Hz
- D. 524 Hz
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Q135
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 :
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2020 (8 sets)
- A. 67 cm
- B. 80 cm
- C. 33 cm
- D. 50 cm
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Q135
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 :
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2020 (8 sets)
- A. 67 cm
- B. 80 cm
- C. 33 cm
- D. 50 cm
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Q136
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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Q137
CHEMISTRY
Unit 5: Solutions
Measuring Zeta potential is useful in determining which property of colloidal solution?
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- A. Stability of the colloidal particles
- B. Size of the colloidal particles
- C. Viscosity
- D. Solubility
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Q138
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 ?
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2020 (8 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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Q139
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 (7 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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Q140
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 correct option?
↻ Repeated question — also appeared in
2020 (1 set)
- A. (iii) (iv) (i) (ii)
- B. (iv) (iii) (ii) (i)
- C. (i) (ii) (iii) (iv)
- D. (ii) (i) (iv) (iii)
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Q141
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :
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2020 (8 sets)
- A. Tert. butyl alcohol
- B. Isobutyl alcohol
- C. Isopropyl alcohol
- D. Sec. butyl alcohol
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Q143
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid ?
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2020 (7 sets)
- A. Tyrosine
- B. Lysine
- C. Serine
- D. Alanine
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Q145
CHEMISTRY
Unit 12: Coordination Compounds
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
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2020 (8 sets)
- A. F- < SCN- < C2O4 2- < CN-
- B. CN- < C2O4 2- < SCN- < F-
- C. SCN- < F- < C2O4 2- < CN-
- D. SCN- < F- < CN- < C2O4 2-
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Q146
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following is a cationic detergent?
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2020 (1 set)
- A. Cetyltrimethyl ammonium bromide
- B. Sodium dodecylbenzene sulphonate
- C. Sodium lauryl sulphate
- D. Sodium stearate
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Q147
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Which one of the followings has maximum number of atoms?
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2020 (6 sets)
- 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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Q149
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following amine will give the carbylamine test?
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- A. N(CH3)3
- B. NH(CH2H5)
- C. NH2
- D. NHCH3
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Q149
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following amine will give the carbylamine test?
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2020 (7 sets)
- A. N(CH3)3
- B. NH(C2H5)2
- C. NH2
- D. NH(CH3)
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Q150
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
Paper chromatography is an example of
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2020 (5 sets)
- A. Thin layer chromatography
- B. Column chromatography
- C. Adsorption chromatography
- D. Partition chromatography
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Q151
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
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 :
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2020 (2 sets)
- A. 15 bar
- B. 18 bar
- C. 9 bar
- D. 12 bar
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Q151
CHEMISTRY
Unit 5: Solutions
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: N = 14, Ar = 40]
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2020 (1 set)
- A. 15 bar
- B. 18 bar
- C. 9 bar
- D. 12 bar
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Q152
CHEMISTRY
Unit 2: Atomic Structure
The number of protons, neutrons and electrons in 175/71 Lu, respectively, are
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 71, 71 and 104
- B. 175, 104 and 71
- C. 71, 104 and 71
- D. 104, 71 and 71
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Q152
CHEMISTRY
Unit 2: Atomic Structure
The number of protons, neutrons and electrons in 175, 71 Lu, respectively, are
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 71, 71 and 104
- B. 175, 104 and 71
- C. 71, 104 and 71
- D. 104, 71 and 71
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Q153
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 :
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2020 (9 sets)
- A. 500 s
- B. 1000 s
- C. 100 s
- D. 200 s
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Q153
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 :
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2020 (9 sets)
- A. 500 s
- B. 1000 s
- C. 100 s
- D. 200 s
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Q154
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Identify a molecule which does not exist.
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2020 (4 sets)
- A. C2
- B. O2
- C. He2
- D. Li2
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Q155
CHEMISTRY
Unit 4: Chemical Thermodynamics
Hydrolysis of sucrose is given by the reaction Sucrose + H2O -> Glucose + Fructose. If the equilibrium constant (Kc) is 2 × 10^13 at 300 K, the value of -DeltaG at the same temperature will be :
↻ Repeated question — also appeared in
2020 (5 sets)
- A. 8.314 J mol–1 K–1 × 300 K × ln(3 × 10^13)
- B. –8.314 J mol–1 K–1 × 300 K × ln(4 × 10^13)
- C. –8.314 J mol–1 K–1 × 300 K × ln(2 × 10^13)
- D. 8.314 J mol–1 K–1 × 300 K × ln(2 × 10^13)
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Q156
CHEMISTRY
Unit 4: Chemical Thermodynamics
For the reaction, 2Cl(g) -> Cl2(g), the correct option is :
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2020 (7 sets)
- A. DeltaH < 0 and DeltaS > 0
- B. DeltaH < 0 and DeltaS < 0
- C. DeltaH > 0 and DeltaS > 0
- D. DeltaH > 0 and DeltaS < 0
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Q157
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 × 10^8 M
- C. 2 × 10^–13 M
- D. 2 × 10^–8 M
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Q158
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
On electrolysis of dil. 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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Q159
CHEMISTRY
Unit 10: p-Block Elements
Which of the following is not correct about carbon monoxide ?
↻ Repeated question — also appeared in
2020 (3 sets)
- A. The carboxyhaemoglobin 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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Q160
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 (7 sets)
- A. 3
- B. 4
- C. 1
- D. 2
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Q161
CHEMISTRY
Unit 15: Hydrocarbons
Elimination reaction of 2-Bromo-pentane to form pent-2-ene is (a) beta-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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Q162
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
What is the change in oxidation number of carbon in the following reaction? CH4 + 4Cl2 -> CCl4 + 4HCl
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2020 (7 sets)
- A. – 4 to + 4
- B. 0 to – 4
- C. + 4 to + 4
- D. 0 to + 4
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Q163
CHEMISTRY
Unit 15: Hydrocarbons
Which of the following alkane cannot be made in good yield by Wurtz reaction?
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2020 (6 sets)
- A. n-Heptane
- B. n-Butane
- C. n-Hexane
- D. 2,3-Dimethylbutane
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Q164
CHEMISTRY
Unit 19: Biomolecules
Sucrose on hydrolysis gives
↻ Repeated question — also appeared in
2020 (7 sets)
- A. alpha-D-Glucose + beta-D-Fructose
- B. alpha-D-Fructose + beta-D-Fructose
- C. beta-D-Glucose + alpha-D-Fructose
- D. alpha-D-Glucose + beta-D-Glucose
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Q165
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect statement.
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2020 (7 sets)
- 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 CrO4^2- and Cr2O7^2- 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.
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Q166
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallise(s)?
- A. Only MgCl2
- B. NaCl, MgCl2 and CaCl2
- C. Both MgCl2 and CaCl2
- D. Only NaCl
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Q166
CHEMISTRY
Unit 6: Equilibrium
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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Q167
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 colorless and odourless gas.
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2020 (6 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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Q168
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 (8 sets)
- A. threshold energy
- B. collision frequency
- C. activation energy
- D. heat of reaction
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Q169
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin only magnetic moment of Cr2+ ion is
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 5.92 BM
- B. 2.84 BM
- C. 3.87 BM
- D. 4.90 BM
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Q169
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin only magnetic moment of Cr2+ ion is
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 5.92 BM
- B. 2.84 BM
- C. 3.87 BM
- D. 4.90 BM
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Q170
CHEMISTRY
Unit 15: Hydrocarbons
Match the following and identify the correct option:
(a) CO(g) + H2(g) (i) Mg(HCO3)2 + Ca(HCO3)2
(b) Temporary hardness of water (ii) An electron deficient hydride
(c) B2H6 (iii) Synthesis gas
(d) H2O2 (iv) Non-planar structure
- A. (iii) (iv) (ii) (i)
- B. (i) (iii) (ii) (iv)
- C. (iii) (i) (ii) (iv)
- D. (iii) (ii) (i) (iv)
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Q171
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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Q172
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Anisole on cleavage with HI gives
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Phenol + C2H5I
- B. Iodobenzene + C2H5OH
- C. Phenol + CH3I
- D. Iodobenzene + CH3OH
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Q173
CHEMISTRY
Unit 12: Coordination Compounds
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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Q174
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 upto 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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Q175
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacid of sulphur has – O – O – linkage?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. H2S2O8, peroxodisulphuric acid
- B. H2S2O7, pyrosulphuric acid
- C. H2SO3, sulphurous acid
- D. H2SO4, sulphuric acid
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Q176
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the correct statement from the following:
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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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Q177
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a natural polymer?
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2020 (4 sets)
- A. polybutadiene
- B. poly (Butadiene-acrylonitrile)
- C. cis-1, 4-polyisoprene
- D. poly (Butadiene-styrene)
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Q178
PHYSICS
Unit 7: Properties of Solids and Liquids
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is
↻ Repeated question — also appeared in
2020 (3 sets)
- A. 288/4 * sqrt(3) pm
- B. 288/4 * sqrt(2) pm
- C. sqrt(3)/4 * 288 pm
- D. sqrt(2)/4 * 288 pm
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Q179
CHEMISTRY
Unit 15: Hydrocarbons
An alkene on ozonolysis gives methanal as one of the product. Its structure is
↻ Repeated question — also appeared in
2020 (5 sets)
- A. CH2 = CH - CH2 - CH3
- B. CH3 - CH = CH - CH3
- C. CH3 - CH2 - CH = CH2
- D. CH3 - CH2 - CH - CH3
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Q180
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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