Q1
BIOLOGY
Unit 4: Plant Physiology
Oxygen is not produced during photosynthesis by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Nostoc
- B. Cycas
- C. Green sulphur bacteria
- D. Chara
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Q2
BIOLOGY
Unit 6: Reproduction
Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
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2018 (10 sets)
- A. Yucca
- B. Banana
- C. Hydrilla
- D. Viola
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Q3
BIOLOGY
Unit 4: Plant Physiology
In which of the following forms is iron absorbed by plants?
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2018 (15 sets)
- A. Ferrous
- B. Free element
- C. Ferric
- D. Both ferric and ferrous
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Q4
BIOLOGY
Unit 4: Plant Physiology
Which of the following elements is responsible for maintaining turgor in cells?
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2018 (15 sets)
- A. Sodium
- B. Potassium
- C. Magnesium
- D. Calcium
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Q5
BIOLOGY
Unit 6: Reproduction
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
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2018 (15 sets)
- A. –80°C
- B. –196°C
- C. –120°C
- D. –160°C
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Q6
BIOLOGY
Unit 6: Reproduction
Double fertilization is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Fusion of one male gamete with two polar nuclei
- B. Fusion of two male gametes with one egg
- C. Fusion of two male gametes of a pollen tube with two different eggs
- D. Syngamy and triple fusion
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Q7
BIOLOGY
Unit 4: Plant Physiology
What is the role of NAD⁺ in cellular respiration?
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2018 (13 sets)
- A. It functions as an electron carrier.
- B. It is a nucleotide source for ATP synthesis.
- C. It functions as an enzyme.
- D. It is the final electron acceptor for anaerobic respiration.
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Q8
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match:
↻ Repeated question — also appeared in
2018 (16 sets)
- A. F₂ Recessive parent – Dihybrid cross
- B. T.H. Morgan – Transduction
- C. Ribozyme – Nucleic acid
- D. G. Mendel – Transformation
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Q9
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
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2018 (16 sets)
- A. Ti plasmid
- B. λ phage
- C. Retrovirus
- D. pBR 322
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Q9
BIOLOGY
Unit 9: Biotechnology and Its Applications
Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Ti plasmid
- B. λ phage
- C. Retrovirus
- D. pBR 322
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Q10
BIOLOGY
Unit 10: Ecology and Environment
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
↻ Repeated question — also appeared in
2018 (4 sets)
- A. Biopiracy
- B. Biodegradation
- C. Bio-infringement
- D. Bioexploitation
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Q10
BIOLOGY
Unit 9: Biotechnology and Its Applications
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Biopiracy
- B. Biodegradation
- C. Bio-infringement
- D. Bioexploitation
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Q11
BIOLOGY
Unit 9: Biotechnology and Its Applications
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Council for Scientific and Industrial Research (CSIR)
- B. Research Committee on Genetic Manipulation (RCGM)
- C. Indian Council of Medical Research (ICMR)
- D. Genetic Engineering Appraisal Committee (GEAC)
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Q11
BIOLOGY
Unit 9: Biotechnology and Its Applications
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Council for Scientific and Industrial Research (CSIR)
- B. Research Committee on Genetic Manipulation (RCGM)
- C. Indian Council of Medical Research (ICMR)
- D. Genetic Engineering Appraisal Committee (GEAC)
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Q12
BIOLOGY
Unit 9: Biotechnology and Its Applications
The correct order of steps in Polymerase Chain Reaction (PCR) is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Annealing, Extension, Denaturation
- B. Denaturation, Extension, Annealing
- C. Extension, Denaturation, Annealing
- D. Denaturation, Annealing, Extension
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Q12
BIOLOGY
Unit 9: Biotechnology and Its Applications
The correct order of steps in Polymerase Chain Reaction (PCR) is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Annealing, Extension, Denaturation
- B. Denaturation, Extension, Annealing
- C. Extension, Denaturation, Annealing
- D. Denaturation, Annealing, Extension
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Q13
BIOLOGY
Unit 9: Biotechnology and Its Applications
A 'new' variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Sharbati Sonora
- B. Lerma Rojo
- C. Co-667
- D. Basmati
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Q14
BIOLOGY
Unit 10: Ecology and Environment
Natality refers to
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Birth rate
- B. Number of individuals leaving the habitat
- C. Death rate
- D. Number of individuals entering a habitat
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Q15
BIOLOGY
Unit 10: Ecology and Environment
World Ozone Day is celebrated on
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 21st April
- B. 16th September
- C. 5th June
- D. 22nd April
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Q16
BIOLOGY
Unit 10: Ecology and Environment
Which of the following is a secondary pollutant?
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2018 (15 sets)
- A. CO₂
- B. SO₂
- C. CO
- D. O₃
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Q17
BIOLOGY
Unit 10: Ecology and Environment
Niche is
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2018 (15 sets)
- A. the physical space where an organism lives
- B. the range of temperature that the organism needs to live
- C. all the biological factors in the organism's environment
- D. the functional role played by the organism where it lives
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Q18
BIOLOGY
Unit 10: Ecology and Environment
What type of ecological pyramid would be obtained with the following data?
Secondary consumer : 120 g
Primary consumer : 60 g
Primary producer : 10 g
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Pyramid of energy
- B. Upright pyramid of numbers
- C. Inverted pyramid of biomass
- D. Upright pyramid of biomass
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Q19
BIOLOGY
Unit 10: Ecology and Environment
In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
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2018 (15 sets)
- A. Cl
- B. Fe
- C. Carbon
- D. Oxygen
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Q20
BIOLOGY
Unit 7: Genetics and Evolution
Which of the following pairs is wrongly matched?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. ABO blood grouping : Co-dominance
- B. XO type sex determination : Grasshopper
- C. Starch synthesis in pea : Multiple alleles
- D. T.H. Morgan : Linkage
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Q21
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct statement:
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Punnett square was developed by a British scientist.
- B. Spliceosomes take part in translation.
- C. Franklin Stahl coined the term 'linkage'.
- D. Transduction was discovered by S. Altman.
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Q22
BIOLOGY
Unit 7: Genetics and Evolution
The experimental proof for semiconservative replication of DNA was first shown in a
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Bacterium
- B. Plant
- C. Fungus
- D. Virus
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Q23
BIOLOGY
Unit 7: Genetics and Evolution
Select the correct match:
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Alfred Hershey and Martha Chase – TMV
- B. Matthew Meselson and F. Stahl – Pisum sativum
- C. Alec Jeffreys – Streptococcus pneumoniae
- D. Francois Jacob and Jacques Monod – Lac operon
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Q24
BIOLOGY
Unit 6: Reproduction
Offsets are produced by
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Mitotic divisions
- B. Parthenocarpy
- C. Meiotic divisions
- D. Parthenogenesis
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Q25
BIOLOGY
Unit 6: Reproduction
Which of the following flowers only once in its life-time?
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2018 (15 sets)
- A. Jackfruit
- B. Mango
- C. Bamboo species
- D. Papaya
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Q26
BIOLOGY
Unit 6: Reproduction
Which of the following has proved helpful in preserving pollen as fossils?
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2018 (10 sets)
- A. Cellulosic intine
- B. Oil content
- C. Pollenkitt
- D. Sporopollenin
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Q27
BIOLOGY
Unit 3: Cell Structure and Function
The two functional groups characteristic of sugars are
↻ Repeated question — also appeared in
2018 (3 sets)
- A. carbonyl and methyl
- B. carbonyl and phosphate
- C. hydroxyl and methyl
- D. carbonyl and hydroxyl
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Q28
BIOLOGY
Unit 1: Diversity in Living World
Which among the following is not a prokaryote?
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2018 (15 sets)
- A. Mycobacterium
- B. Nostoc
- C. Saccharomyces
- D. Oscillatoria
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Q28
BIOLOGY
Unit 1: Diversity in Living World
Which among the following is not a prokaryote?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Mycobacterium
- B. Nostoc
- C. Saccharomyces
- D. Oscillatoria
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Q29
BIOLOGY
Unit 4: Plant Physiology
Which of the following is not a product of light reaction of photosynthesis?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. NADH
- B. NADPH
- C. ATP
- D. Oxygen
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Q29
BIOLOGY
Unit 4: Plant Physiology
Which of the following is not a product of light reaction of photosynthesis?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. NADH
- B. NADPH
- C. ATP
- D. Oxygen
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Q30
BIOLOGY
Unit 4: Plant Physiology
Stomatal movement is not affected by
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Light
- B. O₂ concentration
- C. Temperature
- D. CO₂ concentration
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Q30
BIOLOGY
Unit 4: Plant Physiology
Stomatal movement is not affected by
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Light
- B. O₂ concentration
- C. Temperature
- D. CO₂ concentration
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Q31
BIOLOGY
Unit 3: Cell Structure and Function
The Golgi complex participates in
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Formation of secretory vesicles
- B. Respiration in bacteria
- C. Fatty acid breakdown
- D. Activation of amino acid
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Q31
BIOLOGY
Unit 3: Cell Structure and Function
The Golgi complex participates in
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Formation of secretory vesicles
- B. Respiration in bacteria
- C. Fatty acid breakdown
- D. Activation of amino acid
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Q32
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following is true for nucleolus?
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2018 (16 sets)
- A. It is a membrane-bound structure.
- B. It takes part in spindle formation.
- C. Larger nucleoli are present in dividing cells.
- D. It is a site for active ribosomal RNA synthesis.
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Q32
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following is true for nucleolus?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. It is a membrane-bound structure.
- B. It takes part in spindle formation.
- C. Larger nucleoli are present in dividing cells.
- D. It is a site for active ribosomal RNA synthesis.
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Q33
BIOLOGY
Unit 3: Cell Structure and Function
The stage during which separation of the paired homologous chromosomes begins is
↻ Repeated question — also appeared in
2018 (8 sets)
- A. Diplotene
- B. Diakinesis
- C. Pachytene
- D. Zygotene
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Q33
BIOLOGY
Unit 7: Genetics and Evolution
The stage during which separation of the paired homologous chromosomes begins is
↻ Repeated question — also appeared in
2018 (2 sets)
- A. Diplotene
- B. Diakinesis
- C. Pachytene
- D. Zygotene
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Q34
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Stomata in grass leaf are
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Kidney shaped
- B. Rectangular
- C. Dumb-bell shaped
- D. Barrel shaped
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Q34
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Stomata in grass leaf are
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Kidney shaped
- B. Rectangular
- C. Dumb-bell shaped
- D. Barrel shaped
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Q35
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Casparian strips occur in
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2018 (14 sets)
- A. Pericycle
- B. Cortex
- C. Epidermis
- D. Endodermis
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Q35
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Casparian strips occur in
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Pericycle
- B. Cortex
- C. Epidermis
- D. Endodermis
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Q36
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Plants having little or no secondary growth are
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2018 (14 sets)
- A. Deciduous angiosperms
- B. Conifers
- C. Grasses
- D. Cycads
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Q37
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Pneumatophores occur in
↻ Repeated question — also appeared in
2018 (9 sets)
- A. Free-floating hydrophytes
- B. Carnivorous plants
- C. Halophytes
- D. Submerged hydrophytes
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Q38
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Sweet potato is a modified
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Adventitious root
- B. Tap root
- C. Stem
- D. Rhizome
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Q39
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Secondary xylem and phloem in dicot stem are produced by
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Vascular cambium
- B. Phellogen
- C. Apical meristems
- D. Axillary meristems
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Q40
BIOLOGY
Unit 1: Diversity in Living World
Which of the following statements is correct?
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2018 (15 sets)
- A. Selaginella is heterosporous, while Salvinia is homosporous.
- B. Horsetails are gymnosperms.
- C. Ovules are not enclosed by ovary wall in gymnosperms.
- D. Stems are usually unbranched in both Cycas and Cedrus.
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Q41
BIOLOGY
Unit 1: Diversity in Living World
Select the wrong statement:
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Mushrooms belong to Basidiomycetes.
- B. Pseudopodia are locomotory and feeding structures in Sporozoans.
- C. Cell wall is present in members of Fungi and Plantae.
- D. Mitochondria are the powerhouse of the cell in all kingdoms except Monera.
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Q42
BIOLOGY
Unit 6: Reproduction
Winged pollen grains are present in
↻ Repeated question — also appeared in
2018 (11 sets)
- A. Cycas
- B. Mango
- C. Mustard
- D. Pinus
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Q43
BIOLOGY
Unit 1: Diversity in Living World
After karyogamy followed by meiosis, spores are produced exogenously in
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Alternaria
- B. Agaricus
- C. Neurospora
- D. Saccharomyces
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Q44
BIOLOGY
Unit 1: Diversity in Living World
Match the items given in Column I with those in Column II and select the correct option given below:
Column I:
a. Herbarium
b. Key
c. Museum
d. Catalogue
Column II:
i. It is a place having a collection of preserved plants and animals.
ii. A list that enumerates methodically all the species found in an area with brief description aiding identification.
iii. Is a place where dried and pressed plant specimens mounted on sheets are kept.
iv. A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.
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2018 (10 sets)
- A. a-iii, b-ii, c-i, d-iv
- B. a-ii, b-iv, c-iii, d-i
- C. a-i, b-iv, c-iii, d-ii
- D. a-iii, b-iv, c-i, d-ii
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Q45
BIOLOGY
Unit 1: Diversity in Living World
Which one is wrongly matched?
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2018 (15 sets)
- A. Biflagellate zoospores – Brown algae
- B. Gemma cups – Marchantia
- C. Uniflagellate gametes – Polysiphonia
- D. Unicellular organism – Chlorella
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Q46
BIOLOGY
Unit 5: Human Physiology
Which of these statements is incorrect?
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2018 (3 sets)
- A. Glycolysis occurs in cytosol.
- B. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
- C. Enzymes of TCA cycle are present in mitochondrial matrix.
- D. Oxidative phosphorylation takes place in outer mitochondrial membrane.
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Q47
BIOLOGY
Unit 5: Human Physiology
Nissl bodies are mainly composed of
↻ Repeated question — also appeared in
2018 (4 sets)
- A. DNA and RNA
- B. Nucleic acids and SER
- C. Proteins and lipids
- D. Free ribosomes and RER
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Q48
BIOLOGY
Unit 7: Genetics and Evolution
Select the incorrect match:
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Allosomes – Sex chromosomes
- B. Submetacentric chromosomes – L-shaped chromosomes
- C. Lampbrush chromosomes – Diplotene bivalents
- D. Polytene chromosomes – Oocytes of amphibians
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Q49
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following events does not occur in rough endoplasmic reticulum?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Protein glycosylation
- B. Cleavage of signal peptide
- C. Protein folding
- D. Phospholipid synthesis
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Q49
BIOLOGY
Unit 3: Cell Structure and Function
Which of the following events does not occur in rough endoplasmic reticulum?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Protein glycosylation
- B. Cleavage of signal peptide
- C. Protein folding
- D. Phospholipid synthesis
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Q50
BIOLOGY
Unit 5: Human Physiology
Which of the following terms describe human dentition?
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2018 (16 sets)
- A. Thecodont, Diphyodont, Heterodont
- B. Pleurodont, Monophyodont, Homodont
- C. Thecodont, Diphyodont, Homodont
- D. Pleurodont, Diphyodont, Heterodont
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Q50
BIOLOGY
Unit 5: Human Physiology
Which of the following terms describe human dentition?
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Thecodont, Diphyodont, Heterodont
- B. Pleurodont, Monophyodont, Homodont
- C. Thecodont, Diphyodont, Homodont
- D. Pleurodont, Diphyodont, Heterodont
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Q51
BIOLOGY
Unit 3: Cell Structure and Function
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Polyhedral bodies
- B. Plastidome
- C. Polysome
- D. Nucleosome
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Q51
BIOLOGY
Unit 3: Cell Structure and Function
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Polyhedral bodies
- B. Plastidome
- C. Polysome
- D. Nucleosome
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Q52
BIOLOGY
Unit 5: Human Physiology
Which one of these animals is not a homeotherm?
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2018 (1 set)
- A. Chelone
- B. Camelus
- C. Macropus
- D. Psittacula
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Q52
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which one of these animals is not a homeotherm?
↻ Repeated question — also appeared in
2018 (5 sets)
- A. Chelone
- B. Camelus
- C. Macropus
- D. Psittacula
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Q53
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system.
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2018 (7 sets)
- A. Reptilia
- B. Aves
- C. Amphibia
- D. Osteichthyes
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Q53
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system.
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2018 (7 sets)
- A. Reptilia
- B. Aves
- C. Amphibia
- D. Osteichthyes
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Q54
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the following features is used to identify a male cockroach from a female cockroach?
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2018 (11 sets)
- A. Presence of caudal styles
- B. Forewings with darker tegmina
- C. Presence of a boat shaped sternum on the 9th abdominal segment
- D. Presence of anal cerci
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Q55
BIOLOGY
Unit 10: Ecology and Environment
Which of the following organisms are known as chief producers in the oceans?
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2018 (4 sets)
- A. Diatoms
- B. Cyanobacteria
- C. Dinoflagellates
- D. Euglenoids
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Q56
BIOLOGY
Unit 1: Diversity in Living World
Ciliates differ from all other protozoans in
↻ Repeated question — also appeared in
2018 (14 sets)
- A. having a contractile vacuole for removing excess water
- B. using pseudopodia for capturing prey
- C. using flagella for locomotion
- D. having two types of nuclei
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Q57
BIOLOGY
Unit 2: Structural Organisation in Animals and Plants
Which of the following animals does not undergo metamorphosis?
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2018 (5 sets)
- A. Tunicate
- B. Moth
- C. Earthworm
- D. Starfish
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Q92
PHYSICS
Unit 12: Current Electricity
A carbon resistor of (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Yellow – Violet – Orange – Silver
- B. Yellow – Green – Violet – Gold
- C. Violet – Yellow – Orange – Silver
- D. Green – Orange – Violet – Gold
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Q93
PHYSICS
Unit 12: Current Electricity
A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E' and internal resistance 'R'. The current drawn is I. Now, the 'n' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of 'n' is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 11
- B. 20
- C. 10
- D. 9
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Q94
PHYSICS
Unit 15: Electromagnetic Waves
An em wave is propagating in a medium with a velocity V = V î. The instantaneous oscillating electric field of this em wave is along +y axis. Then the direction of oscillating magnetic field of the em wave will be along
↻ Repeated question — also appeared in
2018 (16 sets)
- A. + z direction
- B. – y direction
- C. – z direction
- D. – x direction
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Q94
PHYSICS
Unit 15: Electromagnetic Waves
An EM wave is propagating in a medium with a velocity V = V î. The instantaneous oscillating electric field of this EM wave is along +y axis. Then the direction of oscillating magnetic field of the EM wave will be along
↻ Repeated question — also appeared in
2018 (16 sets)
- A. +z direction
- B. –y direction
- C. –z direction
- D. –x direction
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Q95
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance
↻ Repeated question — also appeared in
2018 (12 sets)
- A. 138.88 H
- B. 1.389 H
- C. 0.138 H
- D. 13.89 H
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Q95
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance
↻ Repeated question — also appeared in
2018 (12 sets)
- A. 138.88 H
- B. 1.389 H
- C. 0.138 H
- D. 13.89 H
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Q96
PHYSICS
Unit 16: Optics
The refractive index of the material of a prism is √2 and the angle of the prism is 30°. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 45°
- B. 30°
- C. 60°
- D. zero
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Q97
PHYSICS
Unit 16: Optics
An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of 20 cm towards the mirror, the displacement of the image will be
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 36 cm away from the mirror
- B. 30 cm towards the mirror
- C. 30 cm away from the mirror
- D. 36 cm towards the mirror
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Q98
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
An electron of mass m with an initial velocity V = V₀ î (V₀ > 0) enters an electric field E = –E₀ î (E₀ = constant > 0) at t = 0. If λ₀ is its de-Broglie wavelength initially, then its de-Broglie wavelength at time t is
↻ Repeated question — also appeared in
2018 (11 sets)
- A. λ₀ / (1 + eE₀t / mV₀)
- B. λ₀ t
- C. λ₀ (1 + eE₀t / mV₀)
- D. λ₀
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Q99
PHYSICS
Unit 17: Dual Nature of Matter and Radiation
When the light of frequency 2ν₀ (where ν₀ is threshold frequency) is incident on a metal plate, the maximum velocity of electrons emitted is v₁. When the frequency of the incident radiation is increased to 5ν₀, the maximum velocity of electrons emitted from the same plate is v₂. The ratio of v₁ to v₂ is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 1 : 4
- B. 4 : 1
- C. 1 : 2
- D. 2 : 1
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Q100
PHYSICS
Unit 18: Atoms and Nuclei
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 1 : –1
- B. 2 : –1
- C. 1 : 1
- D. 1 : –2
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Q101
PHYSICS
Unit 18: Atoms and Nuclei
For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 10
- B. 30
- C. 20
- D. 15
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Q102
PHYSICS
Unit 16: Optics
Unpolarised light is incident from air on a plane surface of a material of refractive index 'μ'. At a particular angle of incidence 'i', it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Reflected light is polarised with its electric vector perpendicular to the plane of incidence
- B. i = sin⁻¹(1/μ)
- C. Reflected light is polarised with its electric vector parallel to the plane of incidence
- D. i = tan⁻¹(1/μ)
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Q103
PHYSICS
Unit 16: Optics
In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same λ and D) the separation between the slits needs to be changed to
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 1.9 mm
- B. 2.1 mm
- C. 1.8 mm
- D. 1.7 mm
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Q104
PHYSICS
Unit 16: Optics
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
↻ Repeated question — also appeared in
2018 (15 sets)
- A. large focal length and small diameter
- B. large focal length and large diameter
- C. small focal length and large diameter
- D. small focal length and small diameter
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Q105
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
An inductor 20 mH, a capacitor 100 μF and a resistor 50 Ω are connected in series across a source of emf V = 10 sin 314t. The power loss in the circuit is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 0.43 W
- B. 2.74 W
- C. 0.79 W
- D. 1.13 W
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Q105
PHYSICS
Unit 14: Electromagnetic Induction and Alternating Currents
An inductor 20 mH, a capacitor 100 μF and a resistor 50 Ω are connected in series across a source of emf, V = 10 sin 314t. The power loss in the circuit is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 0.43 W
- B. 2.74 W
- C. 0.79 W
- D. 1.13 W
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Q106
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A metallic rod of mass per unit length 0.5 kg m⁻¹ is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 5.98 A
- B. 14.76 A
- C. 7.14 A
- D. 11.32 A
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Q106
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A metallic rod of mass per unit length 0.5 kg m⁻¹ is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 5.98 A
- B. 14.76 A
- C. 7.14 A
- D. 11.32 A
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Q107
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is
↻ Repeated question — also appeared in
2018 (6 sets)
- A. 25 Ω
- B. 250 Ω
- C. 40 Ω
- D. 500 Ω
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Q107
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is
↻ Repeated question — also appeared in
2018 (6 sets)
- A. 25 Ω
- B. 250 Ω
- C. 40 Ω
- D. 500 Ω
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Q108
PHYSICS
Unit 13: Magnetic Effects of Current and Magnetism
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from
↻ Repeated question — also appeared in
2018 (14 sets)
- A. the magnetic field
- B. the lattice structure of the material of the rod
- C. the current source
- D. the induced electric field due to the changing magnetic field
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Q109
PHYSICS
Unit 10: Oscillations and Waves
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27°C two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at 27°C is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 339 m/s
- B. 350 m/s
- C. 330 m/s
- D. 300 m/s
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Q110
PHYSICS
Unit 11: Electrostatics
An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electric field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in it through the same vertical distance h. The time of fall of the electron, in comparison to the time of fall of the proton is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 5 times greater
- B. 10 times greater
- C. smaller
- D. equal
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Q111
PHYSICS
Unit 10: Oscillations and Waves
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s² at a distance of 5 m from the mean position. The time period of oscillation is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. π s
- B. 2 s
- C. 2π s
- D. 1 s
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Q112
PHYSICS
Unit 11: Electrostatics
The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. linearly proportional to the distance between the plates.
- B. proportional to the square root of the distance between the plates.
- C. independent of the distance between the plates.
- D. inversely proportional to the distance between the plates.
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Q113
PHYSICS
Unit 9: Kinetic Theory of Gases
The volume (V) of a monatomic gas varies with its temperature (T), as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to state B, is
- A. 2/3
- B. 1/3
- C. 2/5
- D. 2/7
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Q114
PHYSICS
Unit 8: Thermodynamics
The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 20%
- B. 6.25%
- C. 26.8%
- D. 12.5%
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Q115
PHYSICS
Unit 9: Kinetic Theory of Gases
At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere? (Given: Mass of oxygen molecule m = 2.76 × 10⁻²⁶ kg, Boltzmann's constant k_B = 1.38 × 10⁻²³ J K⁻¹)
↻ Repeated question — also appeared in
2018 (13 sets)
- A. 8.360 × 10⁴ K
- B. 5.016 × 10⁴ K
- C. 2.508 × 10⁴ K
- D. 1.254 × 10⁴ K
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Q116
PHYSICS
Unit 10: Oscillations and Waves
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 8 cm
- B. 12.5 cm
- C. 13.2 cm
- D. 16 cm
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Q116
PHYSICS
Unit 10: Oscillations and Waves
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 8 cm
- B. 12.5 cm
- C. 13.2 cm
- D. 16 cm
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Q117
PHYSICS
Unit 7: Properties of Solids and Liquids
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by Δl on applying a force F, how much force is needed to stretch the second wire by the same amount?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 6 F
- B. 4 F
- C. 9 F
- D. F
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Q117
PHYSICS
Unit 7: Properties of Solids and Liquids
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by l on applying a force F, how much force is needed to stretch the second wire by the same amount?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 6 F
- B. 4 F
- C. 9 F
- D. F
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Q118
PHYSICS
Unit 8: Thermodynamics
A sample of 0.1 g of water at 100°C and normal pressure (1.013 × 10⁵ N m⁻²) requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 208.7 J
- B. 42.2 J
- C. 104.3 J
- D. 84.5 J
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Q118
PHYSICS
Unit 8: Thermodynamics
A sample of 0.1 g of water at 100°C and normal pressure (1.013 × 10⁵ Nm⁻²) requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. 208.7 J
- B. 42.2 J
- C. 104.3 J
- D. 84.5 J
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Q119
PHYSICS
Unit 7: Properties of Solids and Liquids
The power radiated by a black body is P and it radiates maximum energy at wavelength λ₀. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength (4/3)λ₀, the power radiated by it becomes nP. The value of n is
↻ Repeated question — also appeared in
2018 (1 set)
- A. 3/4
- B. 81/256
- C. 4/3
- D. 256/81
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Q120
PHYSICS
Unit 7: Properties of Solids and Liquids
A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity is proportional to
↻ Repeated question — also appeared in
2018 (15 sets)
- A. r²
- B. r⁵
- C. r³
- D. r⁴
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Q121
PHYSICS
Unit 19: Electronic Devices
In the combination of the following gates the output Y can be written in terms of inputs A and B as
↻ Repeated question — also appeared in
2018 (8 sets)
- A. A·B̄ + Ā·B
- B. B·A + A·B
- C. B·A
- D. B+A
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Q123
PHYSICS
Unit 19: Electronic Devices
In a p-n junction diode, change in temperature due to heating
↻ Repeated question — also appeared in
2018 (15 sets)
- A. affects only forward resistance
- B. does not affect resistance of p-n junction
- C. affects only reverse resistance
- D. affects the overall V–I characteristics of p-n junction
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Q124
PHYSICS
Unit 6: Gravitation
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are K_A, K_B and K_C, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
↻ Repeated question — also appeared in
2018 (10 sets)
- A. K_A > K_B > K_C
- B. K_B < K_A < K_C
- C. K_A < K_B < K_C
- D. K_B > K_A > K_C
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Q125
PHYSICS
Unit 5: Rotational Motion
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (K_t) as well as rotational kinetic energy (K_r) simultaneously. The ratio K_t : (K_t + K_r) for the sphere is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. 5 : 7
- B. 10 : 7
- C. 7 : 10
- D. 2 : 5
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Q126
PHYSICS
Unit 6: Gravitation
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?
↻ Repeated question — also appeared in
2018 (13 sets)
- A. Walking on the ground would become more difficult.
- B. Time period of a simple pendulum on the Earth would decrease.
- C. Raindrops will fall faster.
- D. 'g' on the Earth will not change.
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Q127
PHYSICS
Unit 5: Rotational Motion
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?
↻ Repeated question — also appeared in
2018 (15 sets)
- A. Moment of inertia
- B. Rotational kinetic energy
- C. Angular velocity
- D. Angular momentum
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Q128
PHYSICS
Unit 5: Rotational Motion
The moment of the force, F = 4î + 5ĵ – 6k̂ at (2, 0, –3), about the point (2, –2, –2), is given by
↻ Repeated question — also appeared in
2018 (13 sets)
- A. –4î – ĵ – 8k̂
- B. –7î – 8ĵ – 4k̂
- C. –8î – 4ĵ – 7k̂
- D. –7î – 4ĵ – 8k̂
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Q129
PHYSICS
Unit 2: Kinematics
A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field E. Due to the force qE its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 1 m/s, 3 m/s
- B. 1 m/s, 3.5 m/s
- C. 2 m/s, 4 m/s
- D. 1.5 m/s, 3 m/s
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Q129
PHYSICS
Unit 2: Kinematics
A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field E. Due to the force qE its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 1 m/s, 3 m/s
- B. 1 m/s, 3.5 m/s
- C. 2 m/s, 4 m/s
- D. 1.5 m/s, 3 m/s
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Q130
PHYSICS
Unit 3: Laws of Motion
A block of mass m is placed on a smooth inclined wedge ABC of inclination θ as shown in the figure. The wedge is given an acceleration 'a' towards the right. The relation between a and θ for the block to remain stationary on the wedge is
↻ Repeated question — also appeared in
2018 (12 sets)
- A. a = g/sinθ
- B. a = g cosθ
- C. a = g/cosθ
- D. a = g tanθ
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Q130
PHYSICS
Unit 3: Laws of Motion
A block of mass m is placed on a smooth inclined wedge ABC of inclination θ as shown in the figure. The wedge is given an acceleration 'a' towards the right. The relation between a and θ for the block to remain stationary on the wedge is
↻ Repeated question — also appeared in
2018 (12 sets)
- A. a = g/sinθ
- B. a = g cosθ
- C. a = g/cosθ
- D. a = g tanθ
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Q131
PHYSICS
Unit 1: Physics and Measurement
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of –0.004 cm, the correct diameter of the ball is
↻ Repeated question — also appeared in
2018 (9 sets)
- A. 0.525 cm
- B. 0.053 cm
- C. 0.521 cm
- D. 0.529 cm
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Q132
PHYSICS
Unit 5: Rotational Motion
Three objects, A: (a solid sphere), B: (a thin circular disk) and C: (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed ω about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
↻ Repeated question — also appeared in
2018 (15 sets)
- A. W_A > W_B > W_C
- B. W_B > W_A > W_C
- C. W_C > W_B > W_A
- D. W_A > W_C > W_B
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Q133
PHYSICS
Unit 4: Work Energy and Power
A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When the initial velocity of the lighter block is v, then the value of coefficient of restitution (e) will be
↻ Repeated question — also appeared in
2018 (5 sets)
- A. 0.25
- B. 0.8
- C. 0.5
- D. 0.4
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Q134
PHYSICS
Unit 4: Work Energy and Power
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle of diameter AB = D. The height h is equal to
↻ Repeated question — also appeared in
2018 (11 sets)
- A. D
- B. 5D/7
- C. 2D/3
- D. 5D/4
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Q135
PHYSICS
Unit 3: Laws of Motion
Which one of the following statements is incorrect?
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Limiting value of static friction is directly proportional to normal reaction.
- B. Frictional force opposes the relative motion.
- C. Rolling friction is smaller than sliding friction.
- D. Coefficient of sliding friction has dimensions of length.
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Q136
CHEMISTRY
Unit 8: Chemical Kinetics
The correct difference between first- and second-order reactions is that
↻ Repeated question — also appeared in
2018 (15 sets)
- A. the half-life of a first-order reaction does not depend on [A]₀; the half-life of a second-order reaction does depend on [A]₀
- B. a first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed
- C. the rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations
- D. the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations
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Q137
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Among CaH₂, BeH₂, BaH₂, the order of ionic character is
↻ Repeated question — also appeared in
2018 (7 sets)
- A. CaH₂ < BeH₂ < BaH₂
- B. BeH₂ < BaH₂ < CaH₂
- C. BeH₂ < CaH₂ < BaH₂
- D. BaH₂ < BeH₂ < CaH₂
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Q138
CHEMISTRY
Unit 1: Some Basic Concepts in Chemistry
In which case is the number of molecules of water maximum?
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2018 (15 sets)
- A. 0.18 g of water
- B. 0.00224 L of water vapours at 1 atm and 273 K
- C. 18 mL of water
- D. 10⁻³ mol of water
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Q140
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
In the structure of ClF₃, the number of lone pairs of electrons on central atom 'Cl' is
↻ Repeated question — also appeared in
2018 (14 sets)
- A. two
- B. four
- C. one
- D. three
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Q140
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
In the structure of ClF₃, the number of lone pairs of electrons on central atom 'Cl' is
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2018 (14 sets)
- A. two
- B. four
- C. one
- D. three
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Q141
CHEMISTRY
Unit 10: p-Block Elements
The correct order of N-compounds in its decreasing order of oxidation states is
↻ Repeated question — also appeared in
2018 (11 sets)
- A. HNO₃, NO, NH₄Cl, N₂
- B. HNO₃, NH₄Cl, NO, N₂
- C. HNO₃, NO, N₂, NH₄Cl
- D. NH₄Cl, N₂, NO, HNO₃
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Q141
CHEMISTRY
Unit 10: p-Block Elements
The correct order of N-compounds in its decreasing order of oxidation states is
↻ Repeated question — also appeared in
2018 (11 sets)
- A. HNO₃, NO, NH₄Cl, N₂
- B. HNO₃, NH₄Cl, NO, N₂
- C. HNO₃, NO, N₂, NH₄Cl
- D. NH₄Cl, N₂, NO, HNO₃
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Q142
CHEMISTRY
Unit 10: p-Block Elements
Which one of the following elements is unable to form MF₆³⁻ ion?
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2018 (15 sets)
- A. Al
- B. B
- C. Ga
- D. In
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Q142
CHEMISTRY
Unit 10: p-Block Elements
Which one of the following elements is unable to form MF₆³⁻ ion?
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2018 (15 sets)
- A. Al
- B. B
- C. Ga
- D. In
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Q143
CHEMISTRY
Unit 9: Classification of Elements and Periodicity in Properties
The correct order of atomic radii in group 13 elements is
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2018 (12 sets)
- A. B < Al < Ga < In < Tl
- B. B < Ga < Al < Tl < In
- C. B < Al < In < Ga < Tl
- D. B < Ga < Al < In < Tl
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Q143
CHEMISTRY
Unit 10: p-Block Elements
The correct order of atomic radii in group 13 elements is
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2018 (5 sets)
- A. B < Al < Ga < In < Tl
- B. B < Ga < Al < Tl < In
- C. B < Al < In < Ga < Tl
- D. B < Ga < Al < In < Tl
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Q144
CHEMISTRY
Unit 11: d- and f-Block Elements
Considering the Ellingham diagram, which of the following metals can be used to reduce alumina?
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2018 (9 sets)
- A. Zn
- B. Mg
- C. Fe
- D. Cu
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Q144
CHEMISTRY
Unit 10: p-Block Elements
Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
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2018 (7 sets)
- A. Zn
- B. Mg
- C. Fe
- D. Cu
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Q145
CHEMISTRY
Unit 10: p-Block Elements
Which of the following statements is not true for halogens?
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- A. All are oxidizing agents.
- B. All but fluorine show positive oxidation states.
- C. All form monobasic oxyacids.
- D. Chlorine has the highest electron-gain enthalpy.
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Q145
CHEMISTRY
Unit 10: p-Block Elements
Which of the following statements is not true for halogens?
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2018 (16 sets)
- A. All are oxidizing agents.
- B. All but fluorine show positive oxidation states.
- C. All form monobasic oxyacids.
- D. Chlorine has the highest electron-gain enthalpy.
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Q146
CHEMISTRY
Unit 19: Biomolecules
Regarding cross-linked or network polymers, which of the following statements is incorrect?
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- A. They are formed from bi- and tri-functional monomers.
- B. Examples are bakelite and melamine.
- C. They contain covalent bonds between various linear polymer chains.
- D. They contain strong covalent bonds in their polymer chains.
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Q147
CHEMISTRY
Unit 19: Biomolecules
The difference between amylose and amylopectin is
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2018 (14 sets)
- A. Amylose has α-1→4 linkage and α-1→6 linkage
- B. Amylopectin has α-1→4 linkage and α-1→6 linkage
- C. Amylopectin has α-1→4 linkage and β-1→6 linkage
- D. Amylose is made up of glucose and galactose
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Q148
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Nitration of aniline in strong acidic medium also gives m-nitroaniline because
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- A. In electrophilic substitution reactions amino group is meta directive.
- B. In absence of substituents nitro group always goes to m-position.
- C. In spite of substituents nitro group always goes to only m-position.
- D. In acidic (strong) medium aniline is present as anilinium ion.
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Q149
CHEMISTRY
Unit 10: p-Block Elements
Which of the following oxides is most acidic in nature?
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- A. BeO
- B. BaO
- C. MgO
- D. CaO
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Q150
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H₂SO₄. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be
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2018 (4 sets)
- A. 3.0
- B. 2.8
- C. 1.4
- D. 4.4
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Q151
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
The compound A on treatment with Na gives B, and with PCl₅ gives C. B and C react together to give diethyl ether. A, B and C are in the order
↻ Repeated question — also appeared in
2018 (13 sets)
- A. C₂H₅OH, C₂H₅Cl, C₂H₅ONa
- B. C₂H₅Cl, C₂H₆, C₂H₅OH
- C. C₂H₅OH, C₂H₆, C₂H₅Cl
- D. C₂H₅OH, C₂H₅ONa, C₂H₅Cl
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Q152
CHEMISTRY
Unit 15: Hydrocarbons
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is
↻ Repeated question — also appeared in
2018 (15 sets)
- A. CH₂=CH₂
- B. CH₃–CH₃
- C. CH≡CH
- D. CH₄
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Q153
CHEMISTRY
Unit 10: p-Block Elements
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
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- A. NO₂
- B. N₂O
- C. N₂O₅
- D. NO
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Q155
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following molecules represents the order of hybridisation sp², sp², sp, sp from left to right atoms?
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2018 (11 sets)
- A. CH₂=CH–C≡CH
- B. CH₂=CH–CH=CH₂
- C. HC≡C–C≡CH
- D. CH₃–CH=CH–CH₃
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Q157
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
Which of the following is correct with respect to –I effect of the substituents? (R = alkyl)
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- A. –NR₂ < –OR < –F
- B. –NH₂ > –OR > –F
- C. –NH₂ < –OR < –F
- D. –NR₂ > –OR > –F
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Q158
CHEMISTRY
Unit 14: Some Basic Principles of Organic Chemistry
In the reaction of chloroform with an aromatic compound in the presence of NaOH (Reimer-Tiemann reaction), the electrophile involved is
- A. Formyl cation (CHO⁺)
- B. Dichloromethyl anion (CHCl₂⁻)
- C. Dichloromethyl cation (CHCl₂⁺)
- D. Dichlorocarbene (:CCl₂)
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Q159
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
↻ Repeated question — also appeared in
2018 (14 sets)
- A. formation of carboxylate ion
- B. more extensive association of carboxylic acid via van der Waals force of attraction
- C. formation of intramolecular H-bonding
- D. formation of intermolecular H-bonding
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Q159
CHEMISTRY
Unit 17: Organic Compounds Containing Oxygen
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
↻ Repeated question — also appeared in
2018 (14 sets)
- A. Formation of carboxylate ion
- B. More extensive association of carboxylic acid via van der Waals force of attraction
- C. Formation of intramolecular H-bonding
- D. Formation of intermolecular H-bonding
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Q162
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following compounds can form a zwitterion?
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2018 (6 sets)
- A. Acetanilide
- B. Benzoic acid
- C. Aniline
- D. Glycine
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Q162
CHEMISTRY
Unit 18: Organic Compounds Containing Nitrogen
Which of the following compounds can form a zwitterion?
↻ Repeated question — also appeared in
2018 (6 sets)
- A. Acetanilide
- B. Benzoic acid
- C. Aniline
- D. Glycine
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Q163
PHYSICS
Unit 9: Kinetic Theory of Gases
The correction factor 'a' to the ideal gas equation corresponds to
↻ Repeated question — also appeared in
2018 (10 sets)
- A. Volume of the gas molecules
- B. Electric field present between the gas molecules
- C. Density of the gas molecules
- D. Forces of attraction between the gas molecules
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Q164
CHEMISTRY
Unit 7: Redox Reactions and Electrochemistry
For the redox reaction MnO₄⁻ + C₂O₄²⁻ + H⁺ → Mn²⁺ + CO₂ + H₂O, the correct coefficients of the reactants for the balanced equation are (MnO₄⁻ : C₂O₄²⁻ : H⁺)
↻ Repeated question — also appeared in
2018 (3 sets)
- A. 2 : 5 : 16
- B. 2 : 16 : 5
- C. 16 : 5 : 2
- D. 5 : 16 : 2
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Q165
CHEMISTRY
Unit 8: Chemical Kinetics
When initial concentration of the reactant is doubled, the half-life period of a zero order reaction
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2018 (15 sets)
- A. Is doubled
- B. Is tripled
- C. Is halved
- D. Remains unchanged
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Q166
CHEMISTRY
Unit 4: Chemical Thermodynamics
The bond dissociation energies of X₂, Y₂ and XY are in the ratio of 1 : 0.5 : 1. ΔH for the formation of XY is –200 kJ mol⁻¹. The bond dissociation energy of X₂ will be
↻ Repeated question — also appeared in
2018 (12 sets)
- A. 100 kJ mol⁻¹
- B. 800 kJ mol⁻¹
- C. 200 kJ mol⁻¹
- D. 400 kJ mol⁻¹
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Q167
CHEMISTRY
Unit 6: Equilibrium
Which one of the following conditions will favour maximum formation of the product in the reaction, A₂(g) + B₂(g) ⇌ X₂(g), ΔrH = –X kJ?
↻ Repeated question — also appeared in
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- A. Low temperature and low pressure
- B. High temperature and high pressure
- C. Low temperature and high pressure
- D. High temperature and low pressure
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Q168
CHEMISTRY
Unit 5: Solutions
Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is
- A. 2√3 / 3√4
- B. 2√4 / 3√3
- C. √2 / √3
- D. 2 / 1
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Q169
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Consider the following species: CN⁺, CN⁻, NO and CN. Which one of these will have the highest bond order?
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2018 (13 sets)
- A. CN⁻
- B. CN⁺
- C. NO
- D. CN
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Q170
CHEMISTRY
Unit 3: Chemical Bonding and Molecular Structure
Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s² 2s² 2p³, the simplest formula for this compound is
↻ Repeated question — also appeared in
2018 (13 sets)
- A. MgX₂
- B. Mg₂X
- C. Mg₂X₃
- D. Mg₃X₂
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Q171
CHEMISTRY
Unit 2: Atomic Structure
Which one is a wrong statement?
(1) An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
(2) The electronic configuration of N atom is [He] 2s² 2p¹ 2p¹ 2p¹ (with all three 2p electrons in separate orbitals with same spin).
(3) Total orbital angular momentum of electron in 's' orbital is equal to zero.
(4) The value of mₗ for d_{z²} is zero.
- A. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
- B. The electronic configuration of N atom is [He] 2s² 2p¹↑ 2p¹↑ 2p¹↑ (half-filled, all parallel spins — this is correct per Hund's rule).
- C. Total orbital angular momentum of electron in 's' orbital is equal to zero.
- D. The value of mₗ for d_{z²} is zero.
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Q172
CHEMISTRY
Unit 6: Equilibrium
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
a. 60 mL (M/10) HCl + 40 mL (M/10) NaOH
b. 55 mL (M/10) HCl + 45 mL (M/10) NaOH
c. 75 mL (M/5) HCl + 25 mL (M/5) NaOH
d. 100 mL (M/10) HCl + 100 mL (M/10) NaOH
The pH of which one of them will be equal to 1?
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2018 (10 sets)
- A. a
- B. d
- C. b
- D. c
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Q173
CHEMISTRY
Unit 5: Solutions
On which of the following properties does the coagulating power of an ion depend?
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- A. Size of the ion alone
- B. Both magnitude and sign of the charge on the ion
- C. The magnitude of the charge on the ion alone
- D. The sign of charge on the ion alone
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Q173
CHEMISTRY
Unit 5: Solutions
On which of the following properties does the coagulating power of an ion depend?
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2018 (6 sets)
- A. Size of the ion alone
- B. Both magnitude and sign of the charge on the ion
- C. The magnitude of the charge on the ion alone
- D. The sign of charge on the ion alone
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Q174
PHYSICS
Unit 9: Kinetic Theory of Gases
Given van der Waals constant for NH₃, H₂, O₂ and CO₂ are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?
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2018 (10 sets)
- A. H₂
- B. O₂
- C. NH₃
- D. CO₂
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Q174
PHYSICS
Unit 9: Kinetic Theory of Gases
Given van der Waals constant 'a' for NH₃, H₂, O₂ and CO₂ are respectively 4.17, 0.244, 1.36 and 3.59. Which one of the following gases is most easily liquefied?
↻ Repeated question — also appeared in
2018 (10 sets)
- A. H₂
- B. O₂
- C. NH₃
- D. CO₂
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Q175
CHEMISTRY
Unit 6: Equilibrium
The solubility of BaSO₄ in water is 2.42 × 10⁻³ g L⁻¹ at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO₄ = 233 g mol⁻¹)
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 1.08 × 10⁻¹² mol² L⁻²
- B. 1.08 × 10⁻¹⁴ mol² L⁻²
- C. 1.08 × 10⁻¹⁰ mol² L⁻²
- D. 1.08 × 10⁻⁸ mol² L⁻²
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Q175
CHEMISTRY
Unit 6: Equilibrium
The solubility of BaSO₄ in water is 2.42 × 10⁻³ g L⁻¹ at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO₄ = 233 g mol⁻¹)
↻ Repeated question — also appeared in
2018 (14 sets)
- A. 1.08 × 10⁻¹² mol² L⁻²
- B. 1.08 × 10⁻¹⁴ mol² L⁻²
- C. 1.08 × 10⁻¹⁰ mol² L⁻²
- D. 1.08 × 10⁻⁸ mol² L⁻²
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Q176
CHEMISTRY
Unit 12: Coordination Compounds
The type of isomerism shown by the complex [CoCl₂(en)₂] is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Coordination isomerism
- B. Ionization isomerism
- C. Geometrical isomerism
- D. Linkage isomerism
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Q176
CHEMISTRY
Unit 12: Coordination Compounds
The type of isomerism shown by the complex [CoCl₂(en)₂] is
↻ Repeated question — also appeared in
2018 (16 sets)
- A. Coordination isomerism
- B. Ionization isomerism
- C. Geometrical isomerism
- D. Linkage isomerism
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Q177
CHEMISTRY
Unit 11: d- and f-Block Elements
Which one of the following ions exhibits d-d transition and paramagnetism as well?
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2018 (9 sets)
- A. Cr₂O₇²⁻
- B. MnO₄⁻
- C. CrO₄²⁻
- D. MnO₄²⁻
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Q177
CHEMISTRY
Unit 11: d- and f-Block Elements
Which one of the following ions exhibits d-d transition and paramagnetism as well?
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2018 (9 sets)
- A. Cr₂O₇²⁻
- B. MnO₄⁻
- C. CrO₄²⁻
- D. MnO₄²⁻
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Q178
CHEMISTRY
Unit 12: Coordination Compounds
Iron carbonyl, Fe(CO)₅ is
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- A. mononuclear
- B. trinuclear
- C. tetranuclear
- D. dinuclear
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Q179
CHEMISTRY
Unit 12: Coordination Compounds
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code:
Column I: a. Co³⁺, b. Cr³⁺, c. Fe³⁺, d. Ni²⁺
Column II: i. √8 B.M., ii. √35 B.M., iii. √3 B.M., iv. √24 B.M., v. √15 B.M.
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2018 (7 sets)
- A. a-i, b-ii, c-iii, d-iv
- B. a-iv, b-i, c-ii, d-iii
- C. a-iv, b-v, c-ii, d-i
- D. a-iii, b-v, c-i, d-ii
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Q180
CHEMISTRY
Unit 12: Coordination Compounds
The geometry and magnetic behaviour of the complex [Ni(CO)₄] are
↻ Repeated question — also appeared in
2018 (15 sets)
- A. tetrahedral geometry and diamagnetic
- B. square planar geometry and paramagnetic
- C. square planar geometry and diamagnetic
- D. tetrahedral geometry and paramagnetic
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