Q1
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?
↻ Repeated question — also appeared in
2020 (2 sets)
- 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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Q2
BIOLOGY
Unit 6: Reproduction
Meiotic division of the secondary oocyte is completed:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. At the time of copulation
- B. After zygote formation
- C. At the time of fusion of a sperm with an ovum
- D. Prior to ovulation
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Q3
BIOLOGY
Unit 6: Reproduction
Which of the following is correct about viroids?
↻ Repeated question — also appeared in
2020 (1 set)
- A. They have free RNA without protein coat.
- B. They have DNA with protein coat.
- C. They have free DNA without protein coat.
- D. They have RNA with protein coat.
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Q4
BIOLOGY
Unit 6: Reproduction
The plant parts which consist of two generations—one within the other:
↻ Repeated question — also appeared in
2020 (1 set)
- 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
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Q5
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. Sutton
- B. Boveri
- C. Morgan
- D. Mendel
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Q5
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. Sutton
- B. Boveri
- C. Morgan
- D. Mendel
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Q6
BIOLOGY
Unit 1: Diversity in Living World
Which of the following pairs is of unicellular algae?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Gelidium and Gracilaria
- B. Anabaena and Volvox
- C. Chlorella and Spirulina
- D. Laminaria and Sargassum
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Q6
BIOLOGY
Unit 1: Diversity in Living World
Which of the following pairs is of unicellular algae?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Gelidium and Gracilaria
- B. Anabaena and Volvox
- C. Chlorella and Spirulina
- D. Laminaria and Sargassum
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Q7
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. Growth response
- B. Defence action
- C. Effect on reproduction
- D. Nutritive value
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Q7
BIOLOGY
Unit 9: Biotechnology and Its Applications
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
↻ Repeated question — also appeared in
2020 (1 set)
- A. Growth response
- B. Defence action
- C. Effect on reproduction
- D. Nutritive value
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Q8
BIOLOGY
Unit 6: Reproduction
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
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2020 (3 sets)
- A. Mutational breeding
- B. Cross breeding
- C. Inbreeding
- D. Out crossing
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Q8
BIOLOGY
Unit 6: Reproduction
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Mutational breeding
- B. Cross breeding
- C. Inbreeding
- D. Out crossing
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Q9
BIOLOGY
Unit 8: Biology and Human Welfare
The infectious stage of Plasmodium that enters the human body is:
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Sporozoites
- B. Female gametocytes
- C. Male gametocytes
- D. Trophozoites
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Q9
BIOLOGY
Unit 5: Human Physiology
The infectious stage of Plasmodium that enters the human body is:
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Sporozoites
- B. Female gametocytes
- C. Male gametocytes
- D. Trophozoites
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Q10
BIOLOGY
Unit 4: Plant Physiology
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Root pressure
- B. Imbibition
- C. Plasmolysis
- D. Transpiration
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Q10
BIOLOGY
Unit 4: Plant Physiology
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Root pressure
- B. Imbibition
- C. Plasmolysis
- D. Transpiration
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Q11
BIOLOGY
Unit 4: Plant Physiology
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask:
↻ Repeated question — also appeared in
2020 (1 set)
- A. CH4, H2, NH3 and water vapour at 800°C
- B. CH4, H2, NH3 and water vapour at 600°C
- C. CH3, H2, NH3 and water vapour at 600°C
- D. CH4, H2, NH3 and water vapour at 800°C
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Q12
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 (5 sets)
- A. Gross primary productivity is always more than net primary productivity.
- B. Gross primary productivity and Net primary productivity are one and same.
- C. There is no relationship between Gross primary productivity and Net primary productivity.
- D. Gross primary productivity is always less than net primary productivity.
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Q13
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. Ori site
- B. Palindromic sequence
- C. Recognition site
- D. Selectable marker
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Q14
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. ducts of salivary glands
- B. proximal convoluted tubule of nephron
- C. eustachian tube
- D. lining of intestine
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Q15
BIOLOGY
Unit 6: Reproduction
The body of the ovule is fused within the funicle at:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Micropyle
- B. Nucellus
- C. Chalaza
- D. Hilum
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Q16
BIOLOGY
Unit 4: Plant Physiology
In light reaction, plastoquinone facilitates the transfer of electrons from:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Cytochrome b6f complex to PS-I
- B. PS-I to NADP+
- C. PS-I to ATP synthase
- D. PS-II to cytochrome b6f complex
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Q17
BIOLOGY
Unit 5: Human Physiology
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
↻ Repeated question — also appeared in
2020 (1 set)
- A. (iii)(iv)(i)(ii)
- B. (ii)(i)(iii)(iv)
- C. (iv)(i)(ii)(iii)
- D. (i)(iii)(ii)(iv)
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Q18
BIOLOGY
Unit 9: Biotechnology and Its Applications
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
- A. (ii)(i)(iv)(iii)
- B. (i)(ii)(iv)(iii)
- C. (iv)(iii)(ii)(i)
- D. (iii)(iv)(ii)(i)
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Q19
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 is present throughout 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. (c) and (a)
- B. (a) and (b)
- C. (b) and (c)
- D. (d) and (c)
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Q20
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Goblet cells of alimentary canal are modified from:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Columnar epithelial cells
- B. Chondrocytes
- C. Compound epithelial cells
- D. Squamous epithelial cells
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Q21
BIOLOGY
Unit 6: Reproduction
Which of the following is not an inhibitory substance governing seed dormancy?
- A. Abscisic acid
- B. Phenolic acid
- C. Para-ascorbic acid
- D. Gibberellic acid
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Q22
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 helicase
- B. DNA polymerase
- C. RNA polymerase
- D. DNA ligase
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Q22
BIOLOGY
Unit 4: Plant Physiology
Name the enzyme that facilitates opening of DNA helix during transcription.
↻ Repeated question — also appeared in
2020 (1 set)
- A. DNA helicase
- B. DNA polymerase
- C. RNA polymerase
- D. DNA ligase
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Q23
BIOLOGY
Unit 3: Cell Structure and Function
Match the following:
(a) Inhibitor of catalytic activity
(b) Possess peptide bonds
(c) Cell wall material in fungi
(d) Secondary metabolite
Choose the correct option from the following.
↻ Repeated question — also appeared in
2020 (1 set)
- A. (iii)(i)(iv)(ii)
- B. (iii)(iv)(i)(ii)
- C. (ii)(iii)(i)(iv)
- D. (ii)(iv)(iii)(i)
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Q23
BIOLOGY
Unit 1: Diversity in Living World
Match the following:
(a) Inhibitor of catalytic activity
(b) Possess peptide bonds
(c) Cell wall material in fungi
(d) Secondary metabolite
Choose the correct option from the following:
(a)(b)(c)(d)
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (iii)(i)(iv)(ii)
- B. (iii)(iv)(i)(ii)
- C. (ii)(iii)(i)(iv)
- D. (ii)(iv)(iii)(i)
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Q24
BIOLOGY
Unit 1: Diversity in Living World
Bilaterally symmetrical and acoelomate animals are exemplified by:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Platyhelminthes
- B. Aschelminthes
- C. Annelida
- D. Ctenophora
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Q24
BIOLOGY
Unit 1: Diversity in Living World
Bilaterally symmetrical and acoelomate animals are exemplified by:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Platyhelminthes
- B. Aschelminthes
- C. Annelida
- D. Ctenophora
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Q25
BIOLOGY
Unit 5: Human Physiology
Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Uremia and Renal calculi
- B. Ketonuria and Glycosuria
- C. Renal calculi and Hyperglycaemia
- D. Uremia and Ketonuria
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Q25
BIOLOGY
Unit 5: Human Physiology
Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Uremia and Renal calculi
- B. Ketonuria and Glycosuria
- C. Renal calculi and Hyperglycaemia
- D. Uremia and Ketonuria
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Q26
BIOLOGY
Unit 1: Diversity in Living World
Ray florets have:
↻ Repeated question — also appeared in
2020 (1 set)
- A. Superior ovary
- B. Hypogynous ovary
- C. Half inferior ovary
- D. Inferior ovary
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Q26
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Ray florets have:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Superior ovary
- B. Hypogynous ovary
- C. Half inferior ovary
- D. Inferior ovary
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Q27
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. Glycerol, trypsin
- B. Cellulose, lecithin
- C. Inulin, insulin
- D. Chitin, cholesterol
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Q27
CHEMISTRY
Unit 19: Biomolecules
Identify the substances having glycosidic bond and peptide bond, respectively, in their structure:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Glycerol, trypsin
- B. Cellulose, lecithin
- C. Inulin, insulin
- D. Chitin, cholesterol
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Q28
CHEMISTRY
Unit 19: Biomolecules
Which of the following statements is not correct?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. The proinsulin has an extra peptide called C-peptide.
- B. The functional insulin has A and B chains linked together by hydrogen bonds.
- C. Genetically engineered insulin is produced in E. coli.
- D. In man insulin is synthesised as a proinsulin.
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Q29
BIOLOGY
Unit 3: Cell Structure and Function
Some dividing cells exit the cell cycle and enter the vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of:
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2020 (7 sets)
- A. G1 phase
- B. S phase
- C. G2 phase
- D. M phase
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Q30
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 (7 sets)
- A. Reorganisation of all cell components takes place.
- B. Cell is metabolically active, grows but does not replicate its DNA.
- C. Nuclear division takes place.
- D. DNA synthesis or replication takes place.
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Q31
BIOLOGY
Unit 5: Human Physiology
The QRS complex in a standard ECG represents:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Depolarisation of auricles
- B. Depolarisation of ventricles
- C. Repolarisation of ventricles
- D. Repolarisation of auricles
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Q32
BIOLOGY
Unit 4: Plant Physiology
If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 10^9 bp, then the length of the DNA is approximately:
- A. 2.5 meters
- B. 2.2 meters
- C. 2.7 meters
- D. 2.0 meters
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Q33
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. Madagascar
- B. Himalayas
- C. Amazon forests
- D. Western Ghats of India
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Q34
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is put into anaerobic sludge digester for further sewage treatment?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Floating debris
- B. Effluents of primary treatment
- C. Activated sludge
- D. Primary sludge
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Q35
BIOLOGY
Unit 6: Reproduction
Dissolution of the synaptonemal complex occurs during:
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Zygotene
- B. Diplotene
- C. Leptotene
- D. Pachytene
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Q36
BIOLOGY
Unit 6: Reproduction
Select the option including all sexually transmitted diseases.
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Gonorrhoea, Malaria, Genital herpes
- B. AIDS, Malaria, Filaria
- C. Cancer, AIDS, Syphilis
- D. Gonorrhoea, Syphilis, Genital herpes
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Q37
BIOLOGY
Unit 5: Human Physiology
Select the correct statement.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Glucagon is associated with hypoglycemia.
- B. Insulin acts on pancreatic cells and adipocytes.
- C. Insulin is associated with hyperglycemia.
- D. Glucocorticoids stimulate gluconeogenesis.
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Q38
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. Nitrate alone
- B. Ammonia and oxygen
- C. Ammonia and hydrogen
- D. Ammonia alone
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Q39
BIOLOGY
Unit 6: Reproduction
In gel electrophoresis, separated DNA fragments can be visualized with the help of:
↻ Repeated question — also appeared in
2020 (1 set)
- A. Ethidium bromide in UV radiation
- B. Acetocarmine in UV radiation
- C. Ethidium bromide in infrared radiation
- D. Acetocarmine in bright blue light
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Q40
BIOLOGY
Unit 6: Reproduction
In which of the following techniques are embryos transferred to assist those females who cannot conceive?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. GIFT and ZIFT
- B. ICSI and ZIFT
- C. GIFT and ICSI
- D. ZIFT and IUT
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Q41
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Phenylketonuria - Autosomal dominant trait
- B. Sickle cell anaemia - Autosomal recessive trait, chromosome-11
- C. Thalassemia - X linked
- D. Haemophilia - Y linked
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Q41
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Phenylketonuria - Autosomal dominant trait
- B. Sickle cell anaemia - Autosomal recessive trait, chromosome-11
- C. Thalassemia - X linked
- D. Haemophilia - Y linked
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Q42
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is not an attribute of a population?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Natality
- B. Mortality
- C. Species interaction
- D. Sex ratio
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Q42
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is not an attribute of a population?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Natality
- B. Mortality
- C. Species interaction
- D. Sex ratio
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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 3-C compound
- B. 1 molecule of 6-C compound
- C. 1 molecule of 4-C compound and 1 molecule of 2-C compound
- D. 2 molecules of 3-C compound
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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 3-C compound
- B. 1 molecule of 6-C compound
- C. 1 molecule of 4-C compound and 1 molecule of 2-C compound
- D. 2 molecules of 3-C compound
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Q44
BIOLOGY
Unit 4: Plant Physiology
Match the following concerning essential elements and their functions in plants:
(a) Iron
(b) Zinc
(c) Boron
(d) Manganese
(i) Photolysis of water
(ii) Pollen germination
(iii) Required for chlorophyll biosynthesis
(iv) IAA biosynthesis
Select the correct option:
↻ Repeated question — also appeared in
2020 (1 set)
- A. (iv)(iii)(ii)(i)
- B. (iii)(iv)(ii)(i)
- C. (iv)(i)(ii)(iii)
- D. (ii)(i)(iv)(iii)
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Q44
BIOLOGY
Unit 4: Plant Physiology
Match the following concerning essential elements and their functions in plants:
(a) Iron
(b) Zinc
(c) Boron
(d) Manganese
(i) Photolysis of water
(ii) Pollen germination
(iii) Required for chlorophyll biosynthesis
(iv) IAA biosynthesis
Select the correct option:
↻ Repeated question — also appeared in
2020 (1 set)
- A. (iv)(iii)(ii)(i)
- B. (iii)(iv)(ii)(i)
- C. (iv)(i)(ii)(iii)
- D. (ii)(i)(iv)(iii)
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Q45
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 (9 sets)
- A. Peroxisomes
- B. Golgi bodies
- C. Polysomes
- D. Endoplasmic reticulum
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Q45
BIOLOGY
Unit 3: Cell Structure and Function
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Peroxisomes
- B. Golgi bodies
- C. Polysomes
- D. Endoplasmic reticulum
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Q46
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 (6 sets)
- A. (c) and (d)
- B. (a), (b) and (d)
- C. only (d)
- D. (a) and (b)
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Q47
BIOLOGY
Unit 6: Reproduction
The roots that originate from the base of the stem are:
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2020 (1 set)
- A. Primary roots
- B. Prop roots
- C. Lateral roots
- D. Fibrous roots
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Q48
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The ovary is half inferior in:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Mustard
- B. Sunflower
- C. Plum
- D. Brinjal
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Q49
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Match the following columns and select the correct option.
Column I Column II
(a) Floating ribs (i) Located between second and seventh ribs
(b) Acromion (ii) Head of the humerus
(c) Scapula (iii) Clavicle
(d) Glenoid cavity (iv) Do not connect with the sternum
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (i)(iii)(ii)(iv)
- B. (iii)(ii)(iv)(i)
- C. (iv)(iii)(i)(ii)
- D. (ii)(iv)(i)(iii)
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Q50
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
If the head of cockroach is removed, it may live for few days because:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. the cockroach does not have nervous system.
- B. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
- C. the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.
- D. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
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Q51
BIOLOGY
Unit 3: Cell Structure and Function
Identify the incorrect statement.
↻ Repeated question — also appeared in
2020 (1 set)
- A. Sapwood is involved in conduction of water and minerals from root to leaf.
- B. Sapwood is the innermost secondary xylem and is lighter in colour.
- C. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour.
- D. Heart wood does not conduct water but gives mechanical support.
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Q52
BIOLOGY
Unit 8: Biology and Human Welfare
Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to:
- A. Fungal diseases
- B. Plant nematodes
- C. Insect predators
- D. Insect pests
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Q53
CHEMISTRY
Unit 4: Chemical Thermodynamics
The number of substrate level phosphorylations in one turn of citric acid cycle is:
- A. One
- B. Two
- C. Three
- D. Zero
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Q54
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the wrong statement with regard to Restriction Enzymes.
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2020 (7 sets)
- A. They cut the strand of DNA at palindromic sites.
- B. They are useful in genetic engineering.
- C. Sticky ends can be joined by using DNA ligases.
- D. Each restriction enzyme functions by inspecting the length of a DNA sequence.
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Q55
BIOLOGY
Unit 7: Genetics and Evolution
Flippers of Penguins and Dolphins are examples of:
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2020 (8 sets)
- A. Convergent evolution
- B. Industrial melanism
- C. Natural selection
- D. Adaptive radiation
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Q56
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to transport of oxygen.
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2020 (8 sets)
- A. Partial pressure of CO2 can interfere with O2 binding with haemoglobin.
- B. Higher H+ concentration in alveoli favours the formation of oxyhaemoglobin.
- C. Low pCO2 in alveoli favours the formation of oxyhaemoglobin.
- D. Binding of oxygen with haemoglobin is mainly related to partial pressure of O2.
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Q57
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 (8 sets)
- A. A person will have only two of the three alleles.
- B. When I_A and I_B are present together, they express same type of sugar.
- C. Allele 'i' does not produce any sugar.
- D. The gene (I) has three alleles.
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Q57
BIOLOGY
Unit 7: Genetics and Evolution
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. A person will have only two of the three alleles.
- B. When I_A and I_B are present together, they express same type of sugar.
- C. Allele ‘i’ does not produce any sugar.
- D. The gene (I) has three alleles.
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Q58
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Identify the basic amino acid from the following.
- A. Glutamic Acid
- B. Lysine
- C. Valine
- D. Tyrosine
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Q58
BIOLOGY
Unit 7: Genetics and Evolution
Identify the basic amino acid from the following.
- A. Glutamic acid
- B. Lysine
- C. Valine
- D. Tyrosine
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Q69
PHYSICS
Unit 19: Electronic Devices
The first phase of translation is:
- A. Recognition of DNA molecule
- B. Aminoacylation of tRNA
- C. Recognition of an anti-codon
- D. Binding of mRNA to ribosome
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Q91
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. 0.25 mm
- B. 0.5 mm
- C. 1.0 mm
- D. 0.01 mm
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Q91
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:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 0.25 mm
- B. 0.5 mm
- C. 1.0 mm
- D. 0.01 mm
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Q92
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 n d^2 π)
- B. 1 / (2 n d^2 √π)
- C. 1 / (2 n^2 d^2 π)
- D. 1 / (2 n d π)
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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. four times
- B. one-fourth
- C. zero
- D. doubled
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Q94
PHYSICS
Unit 11: Electrostatics
In a certain region of space with volume 0.2 m^3, 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. 0.5 N/C
- B. 1 N/C
- C. 5 N/C
- D. zero
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Q96
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 / [A(L1 - L)]
- B. MgL / AL1
- C. MgL1 / A(L1 - L)
- D. MgL / AL
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Q97
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 (7 sets)
- A. 524 Hz
- B. 536 Hz
- C. 537 Hz
- D. 523 Hz
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Q98
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. 2.05 A
- B. 2.5 A
- C. 25.1 A
- D. 1.7 A
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Q99
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/s^2):
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 340 m
- B. 320 m
- C. 300 m
- D. 360 m
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Q100
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. 10^2 V
- B. 10^3 V
- C. 10^4 V
- D. 10 V
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Q102
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:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 200 V
- B. 400 V
- C. zero
- D. 50 V
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Q103
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 (7 sets)
- A. 8.0×10^-5 T m A^-1
- B. 2.4π×10^-5 T m A^-1
- C. 2.4π×10^-7 T m A^-1
- D. 2.4π×10^-4 T m A^-1
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Q104
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 (7 sets)
- A. reverse bias only
- B. both forward bias and reverse bias
- C. increase in forward current
- D. forward bias only
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Q104
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 (7 sets)
- A. reverse bias only
- B. both forward bias and reverse bias
- C. increase in forward current
- D. forward bias only
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Q105
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. 5.0 g
- B. 10.0 g
- C. 20.0 g
- D. 2.5 g
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Q105
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. 5.0 g
- B. 10.0 g
- C. 20.0 g
- D. 2.5 g
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Q106
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
The energy equivalent of 0.5 g of a substance is:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. 4.5×10^13 J
- B. 1.5×10^13 J
- C. 0.5×10^13 J
- D. 4.5×10^16 J
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Q106
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. 4.5×10^13 J
- B. 1.5×10^13 J
- C. 0.5×10^13 J
- D. 4.5×10^16 J
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Q107
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. insulators only
- B. semiconductors only
- C. insulators and semiconductors
- D. metals
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Q108
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 (9 sets)
- A. 2A / μ
- B. μA
- C. A / (2μ)
- D. A / (2μ)
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Q108
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 (9 sets)
- A. 2A/μ
- B. μA
- C. A/(2μ)
- D. A/2μ
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Q109
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. Singly ionised helium atom (He+)
- B. Deuteron atom
- C. Singly ionised neon atom (Ne+)
- D. Hydrogen atom
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Q110
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. 1.83×10^-7 rad
- B. 7.32×10^-7 rad
- C. 6.00×10^-7 rad
- D. 3.66×10^-7 rad
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Q111
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. 32 N
- B. 30 N
- C. 24 N
- D. 48 N
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Q112
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 m^2 V^-1 s^-1 of:
↻ Repeated question — also appeared in
2020 (4 sets)
- A. 2.5×10^6
- B. 2.5×10^-6
- C. 2.25×10^-15
- D. 2.25×10^15
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Q113
PHYSICS
Unit 19: Electronic Devices
For transistor action, which of the following statements is correct?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Base, emitter and collector regions should have same size.
- B. Both emitter junction as well as the collector junction are forward biased.
- C. The base region must be very thin and lightly doped.
- D. Base, emitter and collector regions should have same doping concentrations.
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Q114
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 C^2 N^-1 m^-2):
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 1.77×10^-12 C^2 N^-1 m^-2
- B. 0.44×10^-10 C^2 N^-1 m^-2
- C. 5.00 C^2 N^-1 m^-2
- D. 0.44×10^-13 C^2 N^-1 m^-2
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Q115
PHYSICS
Unit 1: Physics and Measurement
Taking into account of the significant figures, what is the value of 9.99 m - 0.0099 m ?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 9.98 m
- B. 9.980 m
- C. 9.9 m
- D. 9.9801 m
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Q116
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 (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. g/2
- B. g/5
- C. g/10
- D. g
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Q117
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. 0.2 kg/m^3
- B. 0.1 kg/m^3
- C. 0.02 kg/m^3
- D. 0.5 kg/m^3
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Q118
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 (8 sets)
- A. 1 : 1
- B. 1 : c
- C. 1 : c^2
- D. c : 1
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Q119
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. 3.14×10^-4 T
- B. 6.28×10^-5 T
- C. 3.14×10^-5 T
- D. 6.28×10^-4 T
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Q120
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. half
- B. four times
- C. one-fourth
- D. double
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Q121
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. 1.0×10^-1 m
- B. 1.5×10^-1 m
- C. 1.5×10^-2 m
- D. 1.0×10^-2 m
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Q121
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. 1.0 × 10^-1 m
- B. 1.5 × 10^-1 m
- C. 1.5 × 10^-2 m
- D. 1.0 × 10^-2 m
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Q122
PHYSICS
Unit 1: Physics and Measurement
The energy required to break one bond in DNA is 10^-20 J. This value in eV is nearly:
- A. 0.6
- B. 0.06
- C. 0.006
- D. 6
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Q122
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
The energy required to break one bond in DNA is 10^-20 J. This value in eV is nearly:
- A. 0.6
- B. 0.06
- C. 0.006
- D. 6
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Q123
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 (8 sets)
- A. 9140Zr
- B. 11036Kr
- C. 10336Kr
- D. 14456Ba
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Q123
PHYSICS
Unit 18: Atoms and Nuclei
When a uranium isotope 235_92U is bombarded with a neutron, it generates 89_36Kr, three neutrons and:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 91_40Zr
- B. 110_36Kr
- C. 103_36Kr
- D. 144_56Ba
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Q124
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. adiabatic
- B. isochoric
- C. isobaric
- D. isothermal
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Q124
PHYSICS
Unit 4: Work Energy and Power
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:
- A. adiabatic
- B. isochoric
- C. isobaric
- D. isothermal
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Q125
PHYSICS
Unit 4: Work Energy and Power
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 (2 sets)
- A. 12 × 10^3 J
- B. 24 × 10^3 J
- C. 48 × 10^3 J
- D. 10 × 10^3 J
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Q126
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. 9/4
- B. 3/2
- C. 5/3
- D. 27/8
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Q127
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. 3kBT/2
- B. 5kBT/2
- C. 7kBT/2
- D. kBT/2
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Q128
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. 0.5
- B. 1.0
- C. -1.0
- D. zero
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Q129
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. 50 cm
- B. 67 cm
- C. 80 cm
- D. 33 cm
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Q130
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. 3π/2 rad
- B. π/2 rad
- C. zero
- D. π rad
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Q131
PHYSICS
Unit 16: Optics
The Brewster's angle ib for an interface should be:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 30° < ib < 45°
- B. 45° < ib < 90°
- C. ib = 90°
- D. 0° < ib < 30°
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Q132
PHYSICS
Unit 1: Physics and Measurement
Dimensions of stress are:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. [M L^2 T^-2]
- B. [M L^0 T^-2]
- C. [M L^-1 T^-2]
- D. [M L T^-2]
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Q133
PHYSICS
Unit 20: Experimental Skills
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. 47 kΩ, 10%
- B. 4.7 kΩ, 5%
- C. 470 Ω, 5%
- D. 470 kΩ, 5%
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Q134
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. 1.28×10^5 N/C
- B. 1.28×10^6 N/C
- C. 1.28×10^7 N/C
- D. 1.28×10^4 N/C
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Q135
PHYSICS
Unit 5: Rotational Motion
Find the torque about the origin when a force of 3 N ĵ acts on a particle whose position vector is 2 m k̂.
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2020 (7 sets)
- A. 6 N m ĵ
- B. −6 N m î
- C. 6 N m k̂
- D. 6 N m î
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Q136
CHEMISTRY
Unit 5: Solutions
The mixture which shows positive deviation from Raoult’s law is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Benzene and toluene
- B. Acetone and chloroform
- C. Chloroethane and bromoethane
- D. Ethanol and acetone
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Q138
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. 2
- B. 3
- C. 4
- D. 1
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Q139
CHEMISTRY
Unit 6: Equilibrium
Hydrolysis of sucrose is given by the following reaction: Sucrose + H2O ⇌ Glucose + Fructose. If the equilibrium constant (Kc) is 2×10^13 at 300 K, the value of ΔrG° at the same temperature will be:
↻ Repeated question — also appeared in
2020 (2 sets)
- A. 8.314 J mol^-1 K^-1 × 300 K × ln(2×10^13)
- B. 8.314 J mol^-1 K^-1 × 300 K × ln(3×10^13)
- C. -8.314 J mol^-1 K^-1 × 300 K × ln(4×10^13)
- D. -8.314 J mol^-1 K^-1 × 300 K × ln(2×10^13)
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Q139
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 × 10^13 at 300 K, the value of ΔrG° at the same temperature will be:
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2020 (5 sets)
- A. 8.314 J mol^-1 K^-1 × 300 K × ln(2 × 10^13)
- B. 8.314 J mol^-1 K^-1 × 300 K × ln(3 × 10^13)
- C. -8.314 J mol^-1 K^-1 × 300 K × ln(4 × 10^13)
- D. -8.314 J mol^-1 K^-1 × 300 K × ln(2 × 10^13)
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Q140
CHEMISTRY
Unit 6: Equilibrium
For the reaction, 2Cl(g) → Cl2(g), the correct option is:
- 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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Q140
CHEMISTRY
Unit 4: Chemical Thermodynamics
For the reaction, 2Cl(g) → Cl2(g), the correct option is:
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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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Q141
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
Paper chromatography is an example of:
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- A. Partition chromatography
- B. Thin layer chromatography
- C. Column chromatography
- D. Adsorption chromatography
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Q141
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
Paper chromatography is an example of:
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- A. Partition chromatography
- B. Thin layer chromatography
- C. Column chromatography
- D. Adsorption chromatography
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Q142
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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- A. 200 s
- B. 500 s
- C. 1000 s
- D. 100 s
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Q142
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. 200 s
- B. 500 s
- C. 1000 s
- D. 100 s
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Q143
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacid of sulphur has -O-O- linkage?
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- A. H2SO4, sulphuric acid
- B. H2S2O8, peroxodisulphuric acid
- C. H2S2O7, pyrosulphuric acid
- D. H2SO3, sulphurous acid
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Q143
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacid of sulphur has -O-O- linkage?
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- A. H2SO4, sulphuric acid
- B. H2S2O8, peroxodisulphuric acid
- C. H2S2O7, pyrosulphuric acid
- D. H2SO3, sulphurous acid
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Q144
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as:
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- A. Cannizzaro’s reaction
- B. Cross Cannizzaro’s reaction
- C. Cross Aldol condensation
- D. Aldol condensation
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Q145
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:
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- A. (√2 × 288 pm) / 4
- B. (√4 × 288 pm) / 3
- C. (√4 × 288 pm) / 2
- D. (√3 × 288 pm) / 4
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Q146
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Which of the following is a cationic detergent?
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- A. Sodium stearate
- B. Cetyltrimethyl ammonium bromide
- C. Sodium dodecylbenzene sulphonate
- D. Sodium lauryl sulphate
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Q147
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin only magnetic moment of Cr2+ ion is:
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- A. 4.90 BM
- B. 5.92 BM
- C. 2.84 BM
- D. 3.87 BM
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Q148
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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- A. Only NaCl
- B. Only MgCl2
- C. NaCl, MgCl2 and CaCl2
- D. Both MgCl2 and CaCl2
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Q149
CHEMISTRY
Unit 11: d- and f-Block Elements
Match the following and identify the correct option.
(a) CO(g) + H2(g)
(b) Temporary hardness of water
(c) B2H6
(d) H2O2
- A. (a) (b) (c) (d) = (iii) (ii) (i) (iv)
- B. (a) (b) (c) (d) = (iii) (iv) (ii) (i)
- C. (a) (b) (c) (d) = (i) (iii) (ii) (iv)
- D. (a) (b) (c) (d) = (iii) (i) (ii) (iv)
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Q150
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Elimination reaction of 2-bromopentane to form pent-2-ene is:
- A. (a), (c), (d)
- B. (b), (c), (d)
- C. (a), (b), (d)
- D. (a), (b), (c)
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Q151
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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- A. SCN^- < F^- < CN^- < C2O4^2-
- B. F^- < SCN^- < C2O4^2- < CN^-
- C. CN^- < C2O4^2- < SCN^- < F^-
- D. SCN^- < F^- < C2O4^2- < CN^-
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Q152
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the correct statement from the following:
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- A. Blister copper has blistered appearance due to evolution of CO2.
- B. Vapour phase refining is carried out for nickel by Van Arkel method.
- C. Pig iron can be moulded into a variety of shapes.
- D. Wrought iron is impure iron with 4% carbon.
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Q157
CHEMISTRY
Unit 5: Solutions
Measuring zeta potential is useful in determining which property of colloidal solution?
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- A. Solubility
- B. Stability of the colloidal particles
- C. Size of the colloidal particles
- D. Viscosity
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Q158
CHEMISTRY
Unit 5: Solutions
The freezing point depression constant (Kf) of benzene is 5.12 K kg mol−1. The freezing point depression for a solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off up to two decimal places):
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- A. 0.80 K
- B. 0.40 K
- C. 0.60 K
- D. 0.20 K
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Q159
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following amine will give the carbylamine test?
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Q160
CHEMISTRY
Unit 15: Hydrocarbons
Which of the following is a natural polymer?
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- A. Poly(butadiene-styrene)
- B. Polybutadiene
- C. Poly(butadiene-acrylonitrile)
- D. cis-1,4-polyisoprene
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Q161
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect statement.
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- A. 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.
- B. Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
- C. The oxidation states of chromium in CrO4^2− and Cr2O7^2− are not the same.
- D. Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.
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Q162
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Which of the following set of molecules will have zero dipole moment?
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- A. Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
- B. Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
- C. Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
- D. Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
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Q163
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at anode will be:
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- A. Oxygen gas
- B. H2S gas
- C. SO2 gas
- D. Hydrogen gas
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Q164
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Anisole on cleavage with HI gives:
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Q165
PHYSICS
Unit 18: Atoms and Nuclei
The number of protons, neutrons and electrons in 17571Lu, respectively, are:
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- A. 104, 71 and 71
- B. 71, 71 and 104
- C. 175, 104 and 71
- D. 71, 104 and 71
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Q166
CHEMISTRY
Unit 10: p-Block Elements
Match the following:
Oxide — Nature
(a) CO
(b) BaO
(c) Al2O3
(d) Cl2O7
Which of the following is the correct option?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (ii)(i)(iv)(iii)
- B. (iii)(iv)(i)(ii)
- C. (iv)(iii)(ii)(i)
- D. (i)(ii)(iii)(iv)
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Q167
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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- A. I effect of −CH3 groups
- B. −R effect of −CH3 groups
- C. Hyperconjugation
- D. −I effect of −CH3 groups
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Q168
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Which one of the followings has maximum number of atoms?
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- A. 1 g of Mg(s) [Atomic mass of Mg = 24]
- B. 1 g of O2(g) [Atomic mass of O = 16]
- C. 1 g of Li(s) [Atomic mass of Li = 7]
- D. 1 g of Ag(s) [Atomic mass of Ag = 108]
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Q169
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
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- A. Alanine
- B. Tyrosine
- C. Lysine
- D. Serine
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Q170
CHEMISTRY
Unit 4: Chemical Thermodynamics
The correct option for free expansion of an ideal gas under adiabatic condition is:
↻ Repeated question — also appeared in
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- A. q = 0, ΔT < 0 and w > 0
- B. q < 0, ΔT = 0 and w = 0
- C. q > 0, ΔT > 0 and w > 0
- D. q = 0, ΔT = 0 and w = 0
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Q171
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Identify the incorrect match.
Name — IUPAC Official Name
(a) Unnilunium — Mendelevium
(b) Unniltrium — Lawrencium
(c) Unnilhexium — Seaborgium
(d) Unununnium — Darmstadtium
- A. (b), (ii)
- B. (c), (iii)
- C. (d), (iv)
- D. (a), (i)
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Q172
CHEMISTRY
Unit 2: Atomic Structure
Identify a molecule which does not exist.
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- A. Li2
- B. C2
- C. O2
- D. He2
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Q173
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-membered rings and twenty five carbon rings.
(c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(d) CO is a colorless and odourless gas.
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2020 (5 sets)
- A. (a) and (c) only
- B. (b) and (c) only
- C. (c) and (d) only
- D. (a), (b) and (c) only
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Q174
CHEMISTRY
Unit 15: Hydrocarbons
An alkene on ozonolysis gives methanal as one of the products. Its structure is:
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Q175
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
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- A. Sec. butyl alcohol
- B. Tert. butyl alcohol
- C. Isobutyl alcohol
- D. Isopropyl alcohol
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Q175
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
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- A. Sec. butyl alcohol
- B. Tert. butyl alcohol
- C. Isobutyl alcohol
- D. Isopropyl alcohol
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Q176
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 (in g mol−1): N = 14, Ar = 40]
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- A. 12 bar
- B. 15 bar
- C. 18 bar
- D. 9 bar
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Q176
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:
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2020 (2 sets)
- A. 12 bar
- B. 15 bar
- C. 18 bar
- D. 9 bar
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Q177
CHEMISTRY
Unit 8: Chemical Kinetics
An increase in the concentration of the reactants of a reaction leads to change in:
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- A. heat of reaction
- B. threshold energy
- C. collision frequency
- D. activation energy
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Q177
CHEMISTRY
Unit 8: Chemical Kinetics
An increase in the concentration of the reactants of a reaction leads to change in:
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- A. heat of reaction
- B. threshold energy
- C. collision frequency
- D. activation energy
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Q178
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 (9 sets)
- A. 2×10−8 M
- B. 1×10−13 M
- C. 1×108 M
- D. 2×10−13 M
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Q178
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.
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2020 (9 sets)
- A. 2 × 10^-8 M
- B. 1 × 10^-13 M
- C. 1 × 10^8 M
- D. 2 × 10^-13 M
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Q179
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Identify compound X in the following sequence of reactions:
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Q180
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 (4 sets)
- A. [Cu(NH3)4]2+
- B. Cu(OH)2
- C. CuCO3·Cu(OH)2
- D. CuSO4
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Q180
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 (4 sets)
- A. [Cu(NH3)4]2+
- B. Cu(OH)2
- C. CuCO3·Cu(OH)2
- D. CuSO4
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