Q1
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is not an attribute of a population?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Sex ratio
- B. Natality
- C. Mortality
- D. Species interaction
Correct answer & explanation hidden
Log in to view solution →
Q2
BIOLOGY
Unit 10: Ecology and Environment
The process of growth is maximum during
↻ Repeated question — also appeared in
2020 (1 set)
- A. Log phase
- B. Lag phase
- C. Senescence
- D. Dormancy
Correct answer & explanation hidden
Log in to view solution →
Q3
BIOLOGY
Unit 1: Diversity in Living World
The roots that originate from the base of the stem are
- A. Fibrous roots
- B. Primary roots
- C. Prop roots
- D. Lateral roots
Correct answer & explanation hidden
Log in to view solution →
Q4
BIOLOGY
Unit 5: Human Physiology
Match the following diseases with the causative organism and select the correct option.
- A. (a) Typhoid – (i) Wuchereria; (b) Pneumonia – (iii) Salmonella; (c) Filariasis – (ii) Plasmodium; (d) Malaria – (iv) Haemophilus
- B. (a) Typhoid – (iii) Salmonella; (b) Pneumonia – (iv) Haemophilus; (c) Filariasis – (i) Wuchereria; (d) Malaria – (ii) Plasmodium
- C. (a) Typhoid – (ii) Plasmodium; (b) Pneumonia – (i) Wuchereria; (c) Filariasis – (iii) Salmonella; (d) Malaria – (iv) Haemophilus
- D. (a) Typhoid – (iv) Haemophilus; (b) Pneumonia – (i) Wuchereria; (c) Filariasis – (ii) Plasmodium; (d) Malaria – (iii) Salmonella
Correct answer & explanation hidden
Log in to view solution →
Q5
BIOLOGY
Unit 6: Reproduction
In which of the following techniques are the embryos transferred to assist those females who cannot conceive?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. ZIFT and IUT
- B. GIFT and ZIFT
- C. ICSI and ZIFT
- D. GIFT and ICSI
Correct answer & explanation hidden
Log in to view solution →
Q6
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 (7 sets)
- A. The gene I has three alleles.
- B. A person will have only two of the three alleles.
- C. When Iᵉ and Iᵃ are present together, they express same type of sugar.
- D. Allele 'i' does not produce any sugar.
Correct answer & explanation hidden
Log in to view solution →
Q7
BIOLOGY
Unit 7: Genetics and Evolution
Choose the correct pair from the following
- A. Ligases - Join the two DNA molecules
- B. Polymerases - Break the DNA into fragments
- C. Nucleases - Separate the two strands of DNA
- D. Exonucleases - Make cuts at specific positions within DNA
Correct answer & explanation hidden
Log in to view solution →
Q8
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Haemophilia – Y linked
- B. Phenylketonuria – Autosomal dominant trait
- C. Sickle cell anaemia – Autosomal recessive trait, chromosome-11
- D. Thalassemia – X linked
Correct answer & explanation hidden
Log in to view solution →
Q9
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
↻ Repeated question — also appeared in
2020 (1 set)
- A. (a) Gregarious, polyphagous pest – (i) Asterias; (b) Adult with radial symmetry and larva with bilateral symmetry – (iii) Ctenoplana; (c) Book lungs – (ii) Scorpion; (d) Bioluminescence – (iv) Locusta
- B. (a) Gregarious, polyphagous pest – (iv) Locusta; (b) Adult with radial symmetry and larva with bilateral symmetry – (i) Asterias; (c) Book lungs – (ii) Scorpion; (d) Bioluminescence – (iii) Ctenoplana
- C. (a) Gregarious, polyphagous pest – (iii) Ctenoplana; (b) Adult with radial symmetry and larva with bilateral symmetry – (ii) Scorpion; (c) Book lungs – (i) Asterias; (d) Bioluminescence – (iv) Locusta
- D. (a) Gregarious, polyphagous pest – (ii) Scorpion; (b) Adult with radial symmetry and larva with bilateral symmetry – (i) Asterias; (c) Book lungs – (iii) Ctenoplana; (d) Bioluminescence – (iv) Locusta
Correct answer & explanation hidden
Log in to view solution →
Q10
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. Trophozoites
- B. Sporozoites
- C. Female gametocytes
- D. Male gametocytes
Correct answer & explanation hidden
Log in to view solution →
Q10
BIOLOGY
Unit 6: Reproduction
The infectious stage of Plasmodium that enters the human body is
↻ Repeated question — also appeared in
2020 (1 set)
- A. Trophozoites
- B. Sporozoites
- C. Female gametocytes
- D. Male gametocytes
Correct answer & explanation hidden
Log in to view solution →
Q11
BIOLOGY
Unit 9: Biotechnology and Its Applications
Identify the substances having glycosidic bond and peptide bond, respectively in their structure
- A. Chitin, cholesterol
- B. Glycerol, trypsin
- C. Cellulose, lecithin
- D. Inulin, insulin
Correct answer & explanation hidden
Log in to view solution →
Q11
BIOLOGY
Unit 1: Diversity in Living World
Identify the substances having glycosidic bond and peptide bond, respectively in their structure.
- A. Chitin, cholesterol
- B. Glycerol, trypsin
- C. Cellulose, lecithin
- D. Inulin, insulin
Correct answer & explanation hidden
Log in to view solution →
Q12
BIOLOGY
Unit 6: Reproduction
The plant parts which consist of two generations - one within the other
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a) Pollen grains inside the anther
- B. (b) Germinated pollen grain with two male gametes
- C. (c) Seed inside the fruit
- D. (d) Embryo sac inside the ovule
Correct answer & explanation hidden
Log in to view solution →
Q13
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 (8 sets)
- A. Ammonia alone
- B. Nitrate alone
- C. Ammonia and oxygen
- D. Ammonia and hydrogen
Correct answer & explanation hidden
Log in to view solution →
Q13
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 (8 sets)
- A. Ammonia alone
- B. Nitrate alone
- C. Ammonia and oxygen
- D. Ammonia and hydrogen
Correct answer & explanation hidden
Log in to view solution →
Q14
BIOLOGY
Unit 5: Human Physiology
Identify the correct statement with regard to G1 phase (Gap 1) of interphase.
- A. DNA synthesis or replication takes place.
- B. Reorganisation of all cell components takes place.
- C. Cell is metabolically active, grows but does not replicate its DNA.
- D. Nuclear division takes place.
Correct answer & explanation hidden
Log in to view solution →
Q15
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. Lining of intestine
- B. Ducts of salivary gland
- C. Proximal convoluted tubule of nephron
- D. Eustachian tube
Correct answer & explanation hidden
Log in to view solution →
Q16
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following statements about inclusion bodies is incorrect?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. They are not bound by any membrane
- B. These are involved in ingestion of food particles
- C. They lie free in the cytoplasm
- D. These represent reserve material in cytoplasm
Correct answer & explanation hidden
Log in to view solution →
Q17
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 (8 sets)
- A. Endoplasmic reticulum
- B. Peroxisomes
- C. Golgi bodies
- D. Polysomes
Correct answer & explanation hidden
Log in to view solution →
Q18
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
In gel electrophoresis, separated DNA fragments can be visualized with the help of
- A. Acetocarmine in bright blue light
- B. Ethidium bromide in UV radiation
- C. Acetocarmine in UV radiation
- D. Ethidium bromide in infrared radiation
Correct answer & explanation hidden
Log in to view solution →
Q19
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to transport of oxygen.
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Binding of oxygen with haemoglobin is mainly related to partial pressure of O2
- B. Partial pressure of CO2 can interfere with O2 binding with haemoglobin
- C. Higher H+ concentration in alveoli favours the formation of oxyhaemoglobin
- D. Low pCO2 in alveoli favours the formation of oxyhaemoglobin
Correct answer & explanation hidden
Log in to view solution →
Q20
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Ray florets have
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Inferior ovary
- B. Superior ovary
- C. Hypogynous ovary
- D. Half inferior ovary
Correct answer & explanation hidden
Log in to view solution →
Q21
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
The specific palindromic sequence which is recognized by EcoRI is
↻ Repeated question — also appeared in
2020 (2 sets)
- A. 5′-GAATTC-3′ 3′-CTTAAG-5′
- B. 5′-GGAACC-3′ 3′-CCTTGG-5′
- C. 5′-CTTAAG-3′ 3′-GAATTC-5′
- D. 5′-GGATCC-3′ 3′-CCTAGG-5′
Correct answer & explanation hidden
Log in to view solution →
Q22
CHEMISTRY
Unit 13: Purification and Characterisation of Organic Compounds
Identify the wrong statement with regard to Restriction Enzymes.
- A. Each restriction enzyme functions by inspecting the length of a DNA sequence.
- B. They cut the strand of DNA at palindromic sites.
- C. They are useful in genetic engineering.
- D. Sticky ends can be joined by using DNA ligases.
Correct answer & explanation hidden
Log in to view solution →
Q23
BIOLOGY
Unit 8: Biology and Human Welfare
Which of the following is put into Anaerobic sludge digester for further sewage treatment?
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Primary sludge
- B. Floating debris
- C. Effluents of primary treatment
- D. Activated sludge
Correct answer & explanation hidden
Log in to view solution →
Q24
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
Correct answer & explanation hidden
Log in to view solution →
Q25
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 (8 sets)
- A. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
- B. the cockroach does not have nervous system.
- C. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
- D. the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.
Correct answer & explanation hidden
Log in to view solution →
Q25
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 (8 sets)
- A. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
- B. the cockroach does not have nervous system.
- C. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
- D. the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.
Correct answer & explanation hidden
Log in to view solution →
Q26
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements are true for the phylum Chordata?
- A. In Urochordata notochord extends from head to tail and it is present throughout their life.
- B. In Vertebrata notochord is present during the embryonic period only.
- C. Central nervous system is dorsal and hollow.
- D. Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.
Correct answer & explanation hidden
Log in to view solution →
Q26
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements are true for the phylum Chordata?
(a) In Urochordata notochord extends from head to tail and it is present throughout their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. (d) and (c)
- B. (c) and (a)
- C. (a) and (b)
- D. (b) and (c)
Correct answer & explanation hidden
Log in to view solution →
Q27
BIOLOGY
Unit 10: Ecology and Environment
Match the organism with its use in biotechnology.
(a) Bacillus thuringiensis
(b) Thermus aquaticus
(c) Agrobacterium tumefaciens
(d) Salmonella typhimurium
Select the correct option from the following:
(a) (b) (c) (d)
- A. (ii) (iv) (iii) (i)
- B. (iv) (iii) (i) (ii)
- C. (iii) (ii) (iv) (i)
- D. (iii) (iv) (i) (ii)
Correct answer & explanation hidden
Log in to view solution →
Q28
BIOLOGY
Unit 4: Plant Physiology
Match the following concerning essential elements and their functions in plants.
(a) Iron
(b) Zinc
(c) Boron
(d) Manganese
Select the correct option.
(a) (b) (c) (d)
- A. (ii) (i) (iv) (iii)
- B. (iv) (iii) (ii) (i)
- C. (iii) (iv) (ii) (i)
- D. (iv) (i) (ii) (iii)
Correct answer & explanation hidden
Log in to view solution →
Q29
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the incorrect statement.
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Heart wood does not conduct water but gives mechanical support
- B. Sapwood is involved in conduction of water and minerals from root to leaf
- C. Sapwood is the innermost secondary xylem and is lighter in colour
- D. Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
Correct answer & explanation hidden
Log in to view solution →
Q30
BIOLOGY
Unit 7: Genetics and Evolution
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)
- A. (ii) (iv) (iii) (i)
- B. (iii) (i) (iv) (ii)
- C. (iii) (iv) (i) (ii)
- D. (ii) (iii) (i) (iv)
Correct answer & explanation hidden
Log in to view solution →
Q31
BIOLOGY
Unit 6: Reproduction
Meiotic division of the secondary oocyte is completed
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Prior to ovulation
- B. At the time of copulation
- C. After zygote formation
- D. At the time of fusion of a sperm with an ovum
Correct answer & explanation hidden
Log in to view solution →
Q32
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. 1.5 million
- B. 20 million
- C. 50 million
- D. 7 million
Correct answer & explanation hidden
Log in to view solution →
Q33
BIOLOGY
Unit 7: Genetics and Evolution
The first phase of translation is
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Binding of mRNA to ribosome
- B. Recognition of DNA molecule
- C. Aminoacylation of tRNA
- D. Recognition of an anti-codon
Correct answer & explanation hidden
Log in to view solution →
Q34
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. Western Ghats of India
- B. Madagascar
- C. Himalayas
- D. Amazon forests
Correct answer & explanation hidden
Log in to view solution →
Q35
BIOLOGY
Unit 5: Human Physiology
Which of the following statements is not correct?
- A. In man insulin is synthesised as a proinsulin
- B. The proinsulin has an extra peptide called C-peptide.
- C. The functional insulin has A and B chains linked together by hydrogen bonds.
- D. Genetically engineered insulin is produced in E. coli.
Correct answer & explanation hidden
Log in to view solution →
Q36
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
The transverse section of a plant shows the following anatomical features:
(a) Large number of scattered vascular bundles surrounded by bundle sheath
(b) Large conspicuous parenchymatous ground tissue
(c) Vascular bundles conjoint and closed
(d) Phloem parenchyma absent
Identify the category of plant and its part:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Monocotyledonous stem
- B. Monocotyledonous root
- C. Dicotyledonous stem
- D. Dicotyledonous root
Correct answer & explanation hidden
Log in to view solution →
Q37
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
Column-I Column-II
(a) 6-15 pairs of gill slits
(b) Heterocercal caudal fin
(c) Air bladder
(d) Poison sting
↻ Repeated question — also appeared in
2020 (1 set)
- A. (ii) (iii) (iv) (i)
- B. (iii) (iv) (i) (ii)
- C. (iv) (ii) (iii) (i)
- D. (i) (iv) (iii) (ii)
Correct answer & explanation hidden
Log in to view solution →
Q37
BIOLOGY
Unit 1: Diversity in Living World
Match the following columns and select the correct option.
Column-I Column-II
(a) 6-15 pairs of gill slits (i) Trygon
(b) Heterocercal caudal fin (ii) Cyclostomes
(c) Air bladder (iii) Chondrichthyes
(d) Poison sting (iv) Osteichthyes
↻ Repeated question — also appeared in
2020 (3 sets)
- A. (ii) (iii) (iv) (i)
- B. (iii) (iv) (i) (ii)
- C. (iv) (ii) (iii) (i)
- D. (i) (iv) (iii) (ii)
Correct answer & explanation hidden
Log in to view solution →
Q38
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 800°C
- B. CH3, H2, NH4 and water vapor at 800°C
- C. CH4, H2, NH3 and water vapor at 600°C
- D. CH3, H2, NH3 and water vapor at 600°C
Correct answer & explanation hidden
Log in to view solution →
Q38
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 vapor at 800°C
- B. CH3, H2, NH4 and water vapor at 800°C
- C. CH4, H2, NH3 and water vapor at 600°C
- D. CH3, H2, NH3 and water vapor at 600°C
Correct answer & explanation hidden
Log in to view solution →
Q39
BIOLOGY
Unit 7: Genetics and Evolution
Embryological support for evolution was disapproved by
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Karl Ernst von Baer
- B. Alfred Wallace
- C. Charles Darwin
- D. Oparin
Correct answer & explanation hidden
Log in to view solution →
Q39
BIOLOGY
Unit 7: Genetics and Evolution
Embryological support for evolution was disapproved by
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Karl Ernst von Baer
- B. Alfred Wallace
- C. Charles Darwin
- D. Oparin
Correct answer & explanation hidden
Log in to view solution →
Q40
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. Transpiration
- B. Root pressure
- C. Imbibition
- D. Plasmolysis
Correct answer & explanation hidden
Log in to view solution →
Q40
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. Transpiration
- B. Root pressure
- C. Imbibition
- D. Plasmolysis
Correct answer & explanation hidden
Log in to view solution →
Q41
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. Nutritive value
- B. Growth response
- C. Defence action
- D. Effect on reproduction
Correct answer & explanation hidden
Log in to view solution →
Q42
BIOLOGY
Unit 4: Plant Physiology
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 2 molecules of 3-C compound
- B. 1 molecule of 3-C compound
- C. 1 molecule of 6-C compound
- D. 1 molecule of 4-C compound and 1 molecule of 2-C compound
Correct answer & explanation hidden
Log in to view solution →
Q43
BIOLOGY
Unit 9: Biotechnology and Its Applications
Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Insect pests
- B. Fungal diseases
- C. Plant nematodes
- D. Insect predators
Correct answer & explanation hidden
Log in to view solution →
Q44
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.
↻ Repeated question — also appeared in
2020 (6 sets)
- A. only (a)
- B. (a) and (c)
- C. (b), (c) and (d)
- D. only (d)
Correct answer & explanation hidden
Log in to view solution →
Q45
BIOLOGY
Unit 5: Human Physiology
Identify the wrong statement with reference to immunity.
↻ Repeated question — also appeared in
2020 (3 sets)
- A. When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called “Active immunity”.
- B. When ready-made antibodies are directly given, it is called “Passive immunity”.
- C. Active immunity is quick and gives full response.
- D. Foetus receives some antibodies from mother, it is an example for passive immunity.
Correct answer & explanation hidden
Log in to view solution →
Q46
BIOLOGY
Unit 8: Biology and Human Welfare
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
↻ Repeated question — also appeared in
2020 (5 sets)
- A. Out crossing
- B. Mutational breeding
- C. Cross breeding
- D. Inbreeding
Correct answer & explanation hidden
Log in to view solution →
Q47
BIOLOGY
Unit 5: Human Physiology
Identify the correct statement with reference to human digestive system.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Ileum opens into small intestine
- B. Serosa is the innermost layer of the alimentary canal
- C. Ileum is a highly coiled part
- D. Vermiform appendix arises from duodenum
Correct answer & explanation hidden
Log in to view solution →
Q48
BIOLOGY
Unit 8: Biology and Human Welfare
Match the following columns and select the correct option.
Column-I Column-II
(a) Clostridium butylicum (i) Cyclosporin-A
(b) Trichoderma polysporum (ii) Butyric Acid
(c) Monascus purpureus (iii) Citric Acid
(d) Aspergillus niger (iv) Blood cholesterol lowering agent
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (iii) (iv) (ii) (i)
- B. (ii) (i) (iv) (iii)
- C. (i) (ii) (iv) (iii)
- D. (iv) (iii) (ii) (i)
Correct answer & explanation hidden
Log in to view solution →
Q49
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 (8 sets)
- A. Uremia and Ketonuria
- B. Uremia and Renal Calculi
- C. Ketonuria and Glycosuria
- D. Renal calculi and Hyperglycaemia
Correct answer & explanation hidden
Log in to view solution →
Q50
BIOLOGY
Unit 1: Diversity in Living World
Floridean starch has structure similar to
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Starch and cellulose
- B. Amylopectin and glycogen
- C. Mannitol and algin
- D. Laminarin and cellulose
Correct answer & explanation hidden
Log in to view solution →
Q51
BIOLOGY
Unit 6: Reproduction
Select the option including all sexually transmitted diseases.
↻ Repeated question — also appeared in
2020 (3 sets)
- A. Gonorrhoea, Syphilis, Genital herpes
- B. Gonorrhoea, Malaria, Genital herpes
- C. AIDS, Malaria, Filaria
- D. Cancer, AIDS, Syphilis
Correct answer & explanation hidden
Log in to view solution →
Q51
BIOLOGY
Unit 5: Human Physiology
Select the option including all sexually transmitted diseases.
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Gonorrhoea, Syphilis, Genital herpes
- B. Gonorrhoea, Malaria, Genital herpes
- C. AIDS, Malaria, Filaria
- D. Cancer, AIDS, Syphilis
Correct answer & explanation hidden
Log in to view solution →
Q52
BIOLOGY
Unit 6: Reproduction
Match the following with respect to meiosis.
(a) Zygotene (i) Terminalization
(b) Pachytene (ii) Chiasmata
(c) Diplotene (iii) Crossing over
(d) Diakinesis (iv) Synapsis
Select the correct option from the following:
- A. (iii) (iv) (i) (ii)
- B. (iv) (iii) (ii) (i)
- C. (i) (ii) (iv) (iii)
- D. (ii) (iv) (iii) (i)
Correct answer & explanation hidden
Log in to view solution →
Q52
BIOLOGY
Unit 6: Reproduction
Match the following with respect to meiosis.
(a) Zygotene
(b) Pachytene
(c) Diplotene
(d) Diakinesis
Select the correct option from the following:
(a) (b) (c) (d)
↻ Repeated question — also appeared in
2020 (3 sets)
- A. (iii) (iv) (i) (ii)
- B. (iv) (iii) (ii) (i)
- C. (i) (ii) (iv) (iii)
- D. (ii) (iv) (iii) (i)
Correct answer & explanation hidden
Log in to view solution →
Q53
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. Laminaria and Sargassum
- B. Gelidium and Gracilaria
- C. Anabaena and Volvox
- D. Chlorella and Spirulina
Correct answer & explanation hidden
Log in to view solution →
Q53
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. Laminaria and Sargassum
- B. Gelidium and Gracilaria
- C. Anabaena and Volvox
- D. Chlorella and Spirulina
Correct answer & explanation hidden
Log in to view solution →
Q54
BIOLOGY
Unit 6: Reproduction
Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?
↻ Repeated question — also appeared in
2020 (5 sets)
- A. High concentration of Estrogen
- B. High concentration of Progesterone
- C. Low concentration of LH
- D. Low concentration of FSH
Correct answer & explanation hidden
Log in to view solution →
Q55
BIOLOGY
Unit 9: Biotechnology and Its Applications
Match the following columns and select the correct option.
Column-I / Column-II
(a) Bt cotton
(b) Adenosine deaminase deficiency
(c) RNAi
(d) PCR
↻ Repeated question — also appeared in
2020 (3 sets)
- A. (iv) (i) (ii) (iii)
- B. (iii) (ii) (i) (iv)
- C. (ii) (iii) (iv) (i)
- D. (i) (ii) (iii) (iv)
Correct answer & explanation hidden
Log in to view solution →
Q56
BIOLOGY
Unit 10: Ecology and Environment
Montreal protocol was signed in 1987 for control of
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Transport of genetically modified organisms from one country to another
- B. Emission of ozone depleting substances
- C. Release of greenhouse gases
- D. Disposal of e-wastes
Correct answer & explanation hidden
Log in to view solution →
Q74
PHYSICS
Unit 2: Kinematics
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. 2.0 meters
- B. 2.5 meters
- C. 2.2 meters
- D. 2.7 meters
Correct answer & explanation hidden
Log in to view solution →
Q91
CHEMISTRY
Unit 2: Atomic Structure
Identify a molecule which does not exist.
↻ Repeated question — also appeared in
2020 (3 sets)
- A. He2
- B. Li2
- C. C2
- D. O2
Correct answer & explanation hidden
Log in to view solution →
Q92
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. 2 × 10^-13 M
- B. 2 × 10^-8 M
- C. 1 × 10^-13 M
- D. 1 × 10^8 M
Correct answer & explanation hidden
Log in to view solution →
Q93
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.
↻ Repeated question — also appeared in
2020 (5 sets)
- A. (a), (b) and (c) only
- B. (a) and (c) only
- C. (b) and (c) only
- D. (c) and (d) only
Correct answer & explanation hidden
Log in to view solution →
Q94
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:
↻ Repeated question — also appeared in
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(2 × 10^13)
- C. 8.314 J mol^-1 K^-1 × 300 K × ln(3 × 10^13)
- D. −8.314 J mol^-1 K^-1 × 300 K × ln(4 × 10^13)
Correct answer & explanation hidden
Log in to view solution →
Q95
CHEMISTRY
Unit 15: Hydrocarbons
Identify compound X in the following sequence of reactions:
CH3Cl / hν → X → HO2, 373 K → CHO
- A. Cl
- B. CHCl2
- C. CHCl2
- D. CCl3
Correct answer & explanation hidden
Log in to view solution →
Q96
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect match.
Name IUPAC official name
(a) Unnilunium (i) Mendelevium
(b) Unniltrium (ii) Lawrencium
(c) Unnilhexium (iii) Seaborgium
(d) Unununnium (iv) Darmstadtium
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a), (i)
- B. (b), (ii)
- C. (c), (iii)
- D. (d), (iv)
Correct answer & explanation hidden
Log in to view solution →
Q97
PHYSICS
Unit 5: Rotational Motion
An element has a body-centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is
- A. 3/4 × 288 pm
- B. 2/4 × 288 pm
- C. 4/3 × 288 pm
- D. 4/2 × 288 pm
Correct answer & explanation hidden
Log in to view solution →
Q98
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. Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
- B. Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
- C. Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
- D. Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
Correct answer & explanation hidden
Log in to view solution →
Q99
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
On electrolysis of dilute sulphuric acid using platinum (Pt) electrodes, the product obtained at anode will be
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Hydrogen gas
- B. Oxygen gas
- C. H2S gas
- D. SO2 gas
Correct answer & explanation hidden
Log in to view solution →
Q99
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
On electrolysis of dilute sulphuric acid using platinum (Pt) electrodes, the product obtained at anode will be
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Hydrogen gas
- B. Oxygen gas
- C. H2S gas
- D. SO2 gas
Correct answer & explanation hidden
Log in to view solution →
Q100
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Isopropyl alcohol
- B. Sec. butyl alcohol
- C. Tert. butyl alcohol
- D. Isobutyl alcohol
Correct answer & explanation hidden
Log in to view solution →
Q100
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. Isopropyl alcohol
- B. Sec. butyl alcohol
- C. Tert. butyl alcohol
- D. Isobutyl alcohol
Correct answer & explanation hidden
Log in to view solution →
Q101
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacid of sulphur has –O–O– linkage?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. H2SO3, sulphurous acid
- B. H2SO4, sulphuric acid
- C. H2S2O8, peroxodisulphuric acid
- D. H2S2O7, pyrosulphuric acid
Correct answer & explanation hidden
Log in to view solution →
Q101
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxoacids of sulphur has an –O–O– linkage?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. H2SO3, sulphurous acid
- B. H2SO4, sulphuric acid
- C. H2S2O8, peroxodisulphuric acid
- D. H2S2O7, pyrosulphuric acid
Correct answer & explanation hidden
Log in to view solution →
Q102
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following amine will give the carbylamine test?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. CH3NH2
- B. NHCH3
- C. N(CH3)2
- D. NH(C2H5)
Correct answer & explanation hidden
Log in to view solution →
Q102
CHEMISTRY
Unit 12: Coordination Compounds
Which of the following amine will give the carbylamine test?
- A. Aniline (C6H5NH2)
- B. N-methylaniline (C6H5NHCH3)
- C. N,N-dimethylaniline (C6H5N(CH3)2)
- D. Ethylmethylamine (C2H5NHCH3)
Correct answer & explanation hidden
Log in to view solution →
Q103
CHEMISTRY
Unit 11: d- and f-Block Elements
The calculated spin only magnetic moment of Cr2+ ion is
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 3.87 BM
- B. 4.90 BM
- C. 5.92 BM
- D. 2.84 BM
Correct answer & explanation hidden
Log in to view solution →
Q103
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
The calculated spin only magnetic moment of Cr2+ ion is
- A. 3.87 BM
- B. 4.90 BM
- C. 5.92 BM
- D. 2.84 BM
Correct answer & explanation hidden
Log in to view solution →
Q104
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, 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
Correct answer & explanation hidden
Log in to view solution →
Q105
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. 0.20 K
- B. 0.80 K
- C. 0.40 K
- D. 0.60 K
Correct answer & explanation hidden
Log in to view solution →
Q106
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. 1
- B. 2
- C. 3
- D. 4
Correct answer & explanation hidden
Log in to view solution →
Q107
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. Aldol condensation
- B. Cannizzaro’s reaction
- C. Cross Cannizzaro’s reaction
- D. Cross Aldol condensation
Correct answer & explanation hidden
Log in to view solution →
Q108
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
Paper chromatography is an example of
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Adsorption chromatography
- B. Partition chromatography
- C. Thin layer chromatography
- D. Column chromatography
Correct answer & explanation hidden
Log in to view solution →
Q109
CHEMISTRY
Unit 8: Chemical Kinetics
An increase in the concentration of the reactants of a reaction leads to change in
↻ Repeated question — also appeared in
2020 (7 sets)
- A. activation energy
- B. heat of reaction
- C. threshold energy
- D. collision frequency
Correct answer & explanation hidden
Log in to view solution →
Q110
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
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:
- A. 9 bar
- B. 12 bar
- C. 15 bar
- D. 18 bar
Correct answer & explanation hidden
Log in to view solution →
Q111
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the correct statement from the following:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. Wrought iron is impure iron with 4% carbon.
- B. Blister copper has blistered appearance due to evolution of CO2.
- C. Vapour phase refining is carried out for Nickel by Van Arkel method.
- D. Pig iron can be moulded into a variety of shapes.
Correct answer & explanation hidden
Log in to view solution →
Q112
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of
↻ Repeated question — also appeared in
2020 (8 sets)
- A. −I effect of −CH3 groups
- B. +R effect of −CH3 groups
- C. −R effect of −CH3 groups
- D. Hyperconjugation
Correct answer & explanation hidden
Log in to view solution →
Q113
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a cationic detergent?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. Sodium lauryl sulphate
- B. Sodium stearate
- C. Cetyltrimethyl ammonium bromide
- D. Sodium dodecylbenzene sulphonate
Correct answer & explanation hidden
Log in to view solution →
Q114
CHEMISTRY
Unit 16: Organic Compounds Containing Halogens
Elimination reaction of 2-bromopentane to form pent-2-ene is
(a) β-elimination reaction
(b) Follows Zaitsev rule
(c) Dehydrohalogenation reaction
(d) Dehydration reaction
Which of the following is correct?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a), (b), (c)
- B. (a), (c), (d)
- C. (b), (c), (d)
- D. (a), (b), (d)
Correct answer & explanation hidden
Log in to view solution →
Q115
CHEMISTRY
Unit 5: Solutions
The mixture which shows positive deviation from Raoult’s law is
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Ethanol + Acetone
- B. Benzene + Toluene
- C. Acetone + Chloroform
- D. Chloroethane + Bromoethane
Correct answer & explanation hidden
Log in to view solution →
Q116
CHEMISTRY
Unit 12: Coordination Compounds
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. SCN− < F− < CO < CN−
- B. SCN− < F− < CN− < CO
- C. F− < SCN− < CO < CN−
- D. CN− < CO < SCN− < F−
Correct answer & explanation hidden
Log in to view solution →
Q117
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Serine
- B. Alanine
- C. Tyrosine
- D. Lysine
Correct answer & explanation hidden
Log in to view solution →
Q117
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a basic amino acid?
↻ Repeated question — also appeared in
2020 (8 sets)
- A. Serine
- B. Alanine
- C. Tyrosine
- D. Lysine
Correct answer & explanation hidden
Log in to view solution →
Q118
CHEMISTRY
Unit 20: Principles Related to Practical Chemistry
HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which compound(s) crystallise(s)?
- A. Both MgCl2 and CaCl2
- B. Only NaCl
- C. Only MgCl2
- D. NaCl, MgCl2 and CaCl2
Correct answer & explanation hidden
Log in to view solution →
Q118
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which compound(s) crystallise(s)?
- A. Both MgCl2 and CaCl2
- B. Only NaCl
- C. Only MgCl2
- D. NaCl, MgCl2 and CaCl2
Correct answer & explanation hidden
Log in to view solution →
Q119
CHEMISTRY
Unit 19: Biomolecules
Which of the following is a natural polymer?
↻ Repeated question — also appeared in
2020 (4 sets)
- A. cis-1,4-polyisoprene
- B. poly(butadiene-styrene)
- C. polybutadiene
- D. poly(butadiene-acrylonitrile)
Correct answer & explanation hidden
Log in to view solution →
Q119
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following is a natural polymer?
↻ Repeated question — also appeared in
2020 (3 sets)
- A. cis-1,4-polyisoprene
- B. poly(butadiene-styrene)
- C. polybutadiene
- D. poly(butadiene-acrylonitrile)
Correct answer & explanation hidden
Log in to view solution →
Q121
CHEMISTRY
Unit 19: Biomolecules
Sucrose on hydrolysis gives
↻ Repeated question — also appeared in
2020 (8 sets)
- A. β-D-Glucose + α-D-Fructose
- B. α-D-Glucose + β-D-Glucose
- C. α-D-Glucose + β-D-Fructose
- D. α-D-Fructose + β-D-Fructose
Correct answer & explanation hidden
Log in to view solution →
Q121
CHEMISTRY
Unit 19: Biomolecules
Sucrose on hydrolysis gives
↻ Repeated question — also appeared in
2020 (8 sets)
- A. β-D-Glucose + α-D-Fructose
- B. α-D-Glucose + β-D-Glucose
- C. α-D-Glucose + β-D-Fructose
- D. α-D-Fructose + β-D-Fructose
Correct answer & explanation hidden
Log in to view solution →
Q122
CHEMISTRY
Unit 19: Biomolecules
The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and, with Na, is responsible for the transmission of nerve signals.
- A. Iron
- B. Copper
- C. Calcium
- D. Potassium
Correct answer & explanation hidden
Log in to view solution →
Q123
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
Which one of the following has the maximum number of atoms?
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 1 g of Ag(s) [Atomic mass of Ag = 108]
- B. 1 g of Mg(s) [Atomic mass of Mg = 24]
- C. 1 g of O2(g) [Atomic mass of O = 16]
- D. 1 g of Li(s) [Atomic mass of Li = 7]
Correct answer & explanation hidden
Log in to view solution →
Q124
PHYSICS
Unit 18: Atoms and Nuclei
The number of protons, neutrons and electrons in 17571Lu, respectively, are
↻ Repeated question — also appeared in
2020 (1 set)
- A. 71, 104 and 71
- B. 104, 71 and 71
- C. 71, 71 and 104
- D. 175, 104 and 71
Correct answer & explanation hidden
Log in to view solution →
Q125
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
What is the change in oxidation number of carbon in the following reaction?
CH4(g) + 4Cl2(g) → CCl4(l) + 4HCl(g)
↻ Repeated question — also appeared in
2020 (7 sets)
- A. +4 to +4
- B. 0 to +4
- C. −4 to +4
- D. 0 to −4
Correct answer & explanation hidden
Log in to view solution →
Q126
CHEMISTRY
Unit 11: d- and f-Block Elements
Identify the incorrect statement.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Cr2+ (d4) is a stronger reducing agent than Fe2+ (d6) in water.
- B. 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.
- C. Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
- D. The oxidation states of chromium in CrO4^2− and Cr2O7^2− are not the same.
Correct answer & explanation hidden
Log in to view solution →
Q127
CHEMISTRY
Unit 4: Chemical Thermodynamics
For the reaction, 2Cl(g) → Cl2(g), the correct option is:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. ΔrH > 0 and ΔrS > 0
- B. ΔrH > 0 and ΔrS < 0
- C. ΔrH < 0 and ΔrS > 0
- D. ΔrH < 0 and ΔrS < 0
Correct answer & explanation hidden
Log in to view solution →
Q128
CHEMISTRY
Unit 5: Solutions
Measuring zeta potential is useful in determining which property of colloidal solution?
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Viscosity
- B. Solubility
- C. Stability of the colloidal particles
- D. Size of the colloidal particles
Correct answer & explanation hidden
Log in to view solution →
Q129
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+ (aq), deep blue colour solution C is formed. What is the formula of C from the following?
↻ Repeated question — also appeared in
2020 (3 sets)
- A. CuSO4
- B. [Cu(NH3)4]2+
- C. Cu(OH)2
- D. CuCO3·Cu(OH)2
Correct answer & explanation hidden
Log in to view solution →
Q130
CHEMISTRY
Unit 4: Chemical Thermodynamics
Match the following and identify the correct option.
(a) CO(g) + H2(g)
(b) Temporary hardness of water
(c) B2H6
(d) H2O2
(i) Mg(HCO3)2 + Ca(HCO3)2
(ii) An electron deficient hydride
(iii) Synthesis gas
(iv) Non-planar structure
- A. (a) (b) (c) (d) = (iii) (i) (ii) (iv)
- B. (a) (b) (c) (d) = (iii) (ii) (i) (iv)
- C. (a) (b) (c) (d) = (iii) (iv) (ii) (i)
- D. (a) (b) (c) (d) = (i) (iii) (ii) (iv)
Correct answer & explanation hidden
Log in to view solution →
Q131
CHEMISTRY
Unit 10: p-Block Elements
Match the following:
Oxide — Nature
(a) CO
(b) BaO
(c) Al2O3
(d) Cl2O7
Which is the correct option?
↻ Repeated question — also appeared in
2020 (2 sets)
- A. (a) Neutral, (b) Basic, (c) Amphoteric, (d) Acidic
- B. (a) Neutral, (b) Basic, (c) Amphoteric, (d) Acidic
- C. (a) Acidic, (b) Amphoteric, (c) Neutral, (d) Basic
- D. (a) Amphoteric, (b) Acidic, (c) Basic, (d) Neutral
Correct answer & explanation hidden
Log in to view solution →
Q132
CHEMISTRY
Unit 8: Chemical Kinetics
The rate constant for a first-order reaction is 4.606 × 10−3 s−1. The time required to reduce 2.0 g of the reactant to 0.2 g is:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 100 s
- B. 200 s
- C. 500 s
- D. 1000 s
Correct answer & explanation hidden
Log in to view solution →
Q132
CHEMISTRY
Unit 8: Chemical Kinetics
The rate constant for a first-order reaction is 4.606 × 10^-3 s^-1. The time required to reduce 2.0 g of the reactant to 0.2 g is:
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 100 s
- B. 200 s
- C. 500 s
- D. 1000 s
Correct answer & explanation hidden
Log in to view solution →
Q133
CHEMISTRY
Unit 15: Hydrocarbons
An alkene on ozonolysis gives methanal as one of the products. Its structure is
↻ Repeated question — also appeared in
2020 (6 sets)
- A. CH2=CH−CH3
- B. CH3−CH2−CH3
- C. CH2=CH−CH2−CH3
- D. CH3−CH=CH2
Correct answer & explanation hidden
Log in to view solution →
Q133
CHEMISTRY
Unit 15: Hydrocarbons
An alkene on ozonolysis gives methanal as one of the products. Its structure is
↻ Repeated question — also appeared in
2020 (6 sets)
- A. CH2=CH–CH3
- B. CH3–CH2–CH3
- C. CH2=C(CH3)2
- D. CH3CH2CH3
Correct answer & explanation hidden
Log in to view solution →
Q134
CHEMISTRY
Unit 15: Hydrocarbons
Which of the following alkanes cannot be made in good yield by Wurtz reaction?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. n-Hexane
- B. 2,3-Dimethylbutane
- C. n-Heptane
- D. n-Butane
Correct answer & explanation hidden
Log in to view solution →
Q134
CHEMISTRY
Unit 15: Hydrocarbons
Which of the following alkanes cannot be made in good yield by Wurtz reaction?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. n-Hexane
- B. 2,3-Dimethylbutane
- C. n-Heptane
- D. n-Butane
Correct answer & explanation hidden
Log in to view solution →
Q135
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Anisole on cleavage with HI gives
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Phenol + CH3I
- B. Iodobenzene + CH3OH
- C. Phenol + C2H5I
- D. Iodobenzene + C2H5OH
Correct answer & explanation hidden
Log in to view solution →
Q135
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Anisole on cleavage with HI gives
↻ Repeated question — also appeared in
2020 (4 sets)
- A. Phenol + CH3I
- B. Iodobenzene + CH3OH
- C. Phenol + C2H5I
- D. Iodobenzene + C2H5OH
Correct answer & explanation hidden
Log in to view solution →
Q136
PHYSICS
Unit 18: Atoms and Nuclei
For which one of the following is Bohr model not valid?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Hydrogen atom
- B. Singly ionised helium atom (He+)
- C. Deuteron atom
- D. Singly ionised neon atom (Ne+)
Correct answer & explanation hidden
Log in to view solution →
Q136
PHYSICS
Unit 18: Atoms and Nuclei
For which one of the following is Bohr model not valid?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. Hydrogen atom
- B. Singly ionised helium atom (He+)
- C. Deuteron atom
- D. Singly ionised neon atom (Ne+)
Correct answer & explanation hidden
Log in to view solution →
Q137
PHYSICS
Unit 15: Electromagnetic Waves
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: (c = speed of electromagnetic waves)
↻ Repeated question — also appeared in
2020 (9 sets)
- A. c : 1
- B. 1 : 1
- C. 1 : c
- D. 1 : c2
Correct answer & explanation hidden
Log in to view solution →
Q137
PHYSICS
Unit 15: Electromagnetic Waves
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is (c = speed of electromagnetic waves):
↻ Repeated question — also appeared in
2020 (9 sets)
- A. c : 1
- B. 1 : 1
- C. 1 : c
- D. 1 : c^2
Correct answer & explanation hidden
Log in to view solution →
Q138
PHYSICS
Unit 16: Optics
The Brewster's angle i_b for an interface should be
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 0° < i_b < 30°
- B. 30° < i_b < 45°
- C. 45° < i_b < 90°
- D. i_b = 90°
Correct answer & explanation hidden
Log in to view solution →
Q139
PHYSICS
Unit 8: Thermodynamics
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)
- A. 0.5 kg/m^3
- B. 0.2 kg/m^3
- C. 0.1 kg/m^3
- D. 0.02 kg/m^3
Correct answer & explanation hidden
Log in to view solution →
Q140
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. A/(2μ)
- B. 2A/μ
- C. μA
- D. A/(2μ) (repeated)
Correct answer & explanation hidden
Log in to view solution →
Q141
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. isothermal
- B. adiabatic
- C. isochoric
- D. isobaric
Correct answer & explanation hidden
Log in to view solution →
Q142
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 × 10^16 J
- B. 4.5 × 10^13 J
- C. 1.5 × 10^13 J
- D. 0.5 × 10^13 J
Correct answer & explanation hidden
Log in to view solution →
Q143
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. 48 N
- B. 32 N
- C. 30 N
- D. 24 N
Correct answer & explanation hidden
Log in to view solution →
Q145
PHYSICS
Unit 10: Oscillations and Waves
The phase difference between displacement and acceleration of a particle in simple harmonic motion is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. π rad
- B. 3π/2 rad
- C. π/2 rad
- D. zero
Correct answer & explanation hidden
Log in to view solution →
Q146
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 (6 sets)
- A. 0.01 mm
- B. 0.25 mm
- C. 0.5 mm
- D. 1.0 mm
Correct answer & explanation hidden
Log in to view solution →
Q147
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. 523 Hz
- B. 524 Hz
- C. 536 Hz
- D. 537 Hz
Correct answer & explanation hidden
Log in to view solution →
Q148
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. 33 cm
- B. 50 cm
- C. 67 cm
- D. 80 cm
Correct answer & explanation hidden
Log in to view solution →
Q149
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.
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 6i N m
- B. 6j N m
- C. -6i N m
- D. 6k N m
Correct answer & explanation hidden
Log in to view solution →
Q150
PHYSICS
Unit 20: Experimental Skills
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 a time span of 1 minute is:
- A. 10 × 10^3 J
- B. 12 × 10^3 J
- C. 24 × 10^3 J
- D. 48 × 10^3 J
Correct answer & explanation hidden
Log in to view solution →
Q151
PHYSICS
Unit 11: Electrostatics
A spherical conductor of radius 10 cm has a charge of 3.2 × 10^-7 C distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere? (1/4πϵ0 = 9 × 10^9 N m^2 C^-2)
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 1.28 × 10^4 N/C
- B. 1.28 × 10^5 N/C
- C. 1.28 × 10^6 N/C
- D. 1.28 × 10^7 N/C
Correct answer & explanation hidden
Log in to view solution →
Q151
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? [Take 1/(4πε0) = 9 × 10^9 N m^2 C^-2]
↻ Repeated question — also appeared in
2020 (9 sets)
- A. 1.28 × 10^4 N/C
- B. 1.28 × 10^5 N/C
- C. 1.28 × 10^6 N/C
- D. 1.28 × 10^7 N/C
Correct answer & explanation hidden
Log in to view solution →
Q152
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 (8 sets)
- A. zero
- B. 0.5 N/C
- C. 1 N/C
- D. 5 N/C
Correct answer & explanation hidden
Log in to view solution →
Q152
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 (8 sets)
- A. zero
- B. 0.5 N/C
- C. 1 N/C
- D. 5 N/C
Correct answer & explanation hidden
Log in to view solution →
Q153
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. forward bias only
- B. reverse bias only
- C. both forward bias and reverse bias
- D. increase in forward current
Correct answer & explanation hidden
Log in to view solution →
Q153
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. forward bias only
- B. reverse bias only
- C. both forward bias and reverse bias
- D. increase in forward current
Correct answer & explanation hidden
Log in to view solution →
Q154
PHYSICS
Unit 12: Current Electricity
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 (2 sets)
- A. 1.7 A
- B. 2.05 A
- C. 2.5 A
- D. 25.1 A
Correct answer & explanation hidden
Log in to view solution →
Q154
PHYSICS
Unit 12: Current Electricity
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 (2 sets)
- A. 1.7 A
- B. 2.05 A
- C. 2.5 A
- D. 25.1 A
Correct answer & explanation hidden
Log in to view solution →
Q155
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/(2nπd)
- B. 1/(2√2 nπd^2)
- C. 1/(2n^2πd^2)
- D. 1/(2√2 nπd)
Correct answer & explanation hidden
Log in to view solution →
Q156
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 doping concentrations.
- B. Base, emitter and collector regions should have same size.
- C. Both emitter junction as well as the collector junction are forward biased.
- D. The base region must be very thin and lightly doped.
Correct answer & explanation hidden
Log in to view solution →
Q157
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. doubled
- B. four times
- C. one-fourth
- D. zero
Correct answer & explanation hidden
Log in to view solution →
Q158
PHYSICS
Unit 18: Atoms and Nuclei
When a uranium isotope 23592U is bombarded with a neutron, it generates 8936Kr, three neutrons and:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 14456Ba
- B. 9140Zr
- C. 10136Kr
- D. 10336Kr
Correct answer & explanation hidden
Log in to view solution →
Q159
PHYSICS
Unit 18: Atoms and Nuclei
The energy required to break one bond in DNA is 10^-20 J. This value in eV is nearly:
↻ Repeated question — also appeared in
2020 (6 sets)
- A. 6
- B. 0.6
- C. 0.06
- D. 0.006
Correct answer & explanation hidden
Log in to view solution →
Q160
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
- B. g/2
- C. g/5
- D. g/10
Correct answer & explanation hidden
Log in to view solution →
Q161
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)
- B. MgL/(A(L - L1))
- C. MgL1/(AL)
- D. MgL/(A(L1 - L))
Correct answer & explanation hidden
Log in to view solution →
Q162
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. 1/2 kB T
- B. 3/2 kB T
- C. 5/2 kB T
- D. 7/2 kB T
Correct answer & explanation hidden
Log in to view solution →
Q163
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. Graph 1
- B. Graph 2
- C. Graph 3
- D. Graph 4
Correct answer & explanation hidden
Log in to view solution →
Q164
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. 470 kΩ, 5%
- B. 47 kΩ, 10%
- C. 4.7 kΩ, 5%
- D. 470 Ω, 5%
Correct answer & explanation hidden
Log in to view solution →
Q165
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. double
- B. half
- C. four times
- D. one-fourth
Correct answer & explanation hidden
Log in to view solution →
Q166
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. 0.44 × 10^-13 C^2 N^-1 m^-2
- B. 1.77 × 10^-12 C^2 N^-1 m^-2
- C. 0.44 × 10^-10 C^2 N^-1 m^-2
- D. 5.00 C^2 N^-1 m^-2
Correct answer & explanation hidden
Log in to view solution →
Q166
PHYSICS
Unit 11: Electrostatics
The capacitance becomes 30 μF. The permittivity of the medium is (ε0 = 8.85 × 10^-12 C^2 N^-1 m^-2).
- A. 0.44 × 10^-13 C^2 N^-1 m^-2
- B. 1.77 × 10^-12 C^2 N^-1 m^-2
- C. 0.44 × 10^-10 C^2 N^-1 m^-2
- D. 5.00 C^2 N^-1 m^-2
Correct answer & explanation hidden
Log in to view solution →
Q167
PHYSICS
Unit 1: Physics and Measurement
Dimensions of stress are:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. [MLT^-2]
- B. [ML^2T^-2]
- C. [ML^0T^-2]
- D. [ML^-1T^-2]
Correct answer & explanation hidden
Log in to view solution →
Q167
PHYSICS
Unit 1: Physics and Measurement
Dimensions of stress are:
↻ Repeated question — also appeared in
2020 (7 sets)
- A. [MLT^-2]
- B. [ML^2T^-2]
- C. [ML^0T^-2]
- D. [ML^-1T^-2]
Correct answer & explanation hidden
Log in to view solution →
Q168
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 (8 sets)
- A. 3.66 × 10^-7 rad
- B. 1.83 × 10^-7 rad
- C. 7.32 × 10^-7 rad
- D. 6.00 × 10^-7 rad
Correct answer & explanation hidden
Log in to view solution →
Q168
PHYSICS
Unit 16: Optics
Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of a telescope whose objective has a diameter of 2 m is:
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 3.66 × 10^-7 rad
- B. 1.83 × 10^-7 rad
- C. 7.32 × 10^-7 rad
- D. 6.00 × 10^-7 rad
Correct answer & explanation hidden
Log in to view solution →
Q169
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. zero
- B. 0.5
- C. 1.0
- D. -1.0
Correct answer & explanation hidden
Log in to view solution →
Q169
PHYSICS
Unit 12: Current Electricity
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:
- A. zero
- B. 0.5
- C. 1.0
- D. -1.0
Correct answer & explanation hidden
Log in to view solution →
Q170
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 × 10^9 N m^2/C^2)
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 50 V
- B. 200 V
- C. 400 V
- D. zero
Correct answer & explanation hidden
Log in to view solution →
Q171
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. 2.4π × 10^-4 T m A^-1
- B. 8.0 × 10^-5 T m A^-1
- C. 2.4π × 10^-5 T m A^-1
- D. 2.4π × 10^-7 T m A^-1
Correct answer & explanation hidden
Log in to view solution →
Q172
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is (μ0 = 4π × 10^-7 T m A^-1).
↻ Repeated question — also appeared in
2020 (8 sets)
- A. 6.28 × 10^-4 T
- B. 3.14 × 10^-4 T
- C. 6.28 × 10^-5 T
- D. 3.14 × 10^-5 T
Correct answer & explanation hidden
Log in to view solution →
Q173
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. 2.25 × 10^15
- B. 2.5 × 10^6
- C. 2.5 × 10^-6
- D. 2.25 × 10^-15
Correct answer & explanation hidden
Log in to view solution →
Q174
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. 27/8
- B. 9/4
- C. 3/2
- D. 5/3
Correct answer & explanation hidden
Log in to view solution →
Q175
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 V
- B. 10^2 V
- C. 10^3 V
- D. 10^4 V
Correct answer & explanation hidden
Log in to view solution →
Q176
PHYSICS
Unit 1: Physics and Measurement
Taking into account the significant figures, what is the value of 9.99 m - 0.0099 m?
↻ Repeated question — also appeared in
2020 (7 sets)
- A. 9.9801 m
- B. 9.98 m
- C. 9.980 m
- D. 9.9 m
Correct answer & explanation hidden
Log in to view solution →
Q177
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. 360 m
- B. 340 m
- C. 320 m
- D. 300 m
Correct answer & explanation hidden
Log in to view solution →
Q178
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 (8 sets)
- A. 2.5 g
- B. 5.0 g
- C. 10.0 g
- D. 20.0 g
Correct answer & explanation hidden
Log in to view solution →
Q179
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. 1.0 × 10^-2 m
- B. 1.0 × 10^-1 m
- C. 1.5 × 10^-1 m
- D. 1.5 × 10^-2 m
Correct answer & explanation hidden
Log in to view solution →
Q180
PHYSICS
Unit 19: Electronic Devices
For the logic circuit shown, the truth table is:
↻ Repeated question — also appeared in
2020 (5 sets)
- A. A B Y 0 0 0 0 1 0 1 0 0 1 1 1
- B. A B Y 0 0 0 0 1 1 1 0 1 1 1 1
- C. A B Y 0 0 1 0 1 1 1 0 1 1 1 0
- D. A B Y 0 0 1 0 1 0 1 0 0 1 1 0
Correct answer & explanation hidden
Log in to view solution →