Full Test - NEET PYQs (2023)

Botany - Section A

1. Regarding Meiosis, which of the statement is incorrect ?
1. Four haploid cells are formed at the end of Meiosis-II
2. There are two stage in Meiosis, Meiosis-I and II
3. DNA replication occurs in S phase of Meiosis-II
4. Pairing of homologous chromosomes and recombination occurs in Meiosis-I

2.

An organism used as a bio-fertilizer for raising soyabean crop is

1. Azospirillum
2. Rhizobium
3. Nostoc
4. Azotobacter

3.

The label of a herbarium sheet does not carry information on
1.date of collection
2. name of collector
3.local names
4.height of the plant

4.

Loading of phloem is related to : -
1. Increase of sugar in phloem
2. Elongation of phloem cell
3. Separation of phloem parenchyma
4. Strengthening of phloem fiber

5.

Antiparallel strands of a DNA molecule means that:
1. one strand turns anti-clockwise
2. the phosphate groups of two DNA strands, at their ends, share the same position
3. the phosphate groups at the start of two DNA strands are in opposite position(pole)
4. one strand turns clockwise

6.

Which one of the following statements is not valid for aerosols?
1. They alter rainfall and monsoon patterns
2. They caused increased agricultural productivity.
3. They have negative impact on agricultural land.
4. They are harmful to human health.

7.

Chlorophyll in chloroplasts is located in -
(1) Grana
(2) Pyrenoid
(3) Stroma
(4) Both (1) and (3)

8.

In glycolysis, during oxidation electrons are removed by -
1. Glyceraldehyde-3-phosphate
2. NAD⁺
3. Molecular oxygen
4. ATP

9. Which of the following is incorrectly matched?
1.Volvox- Starch
2.Ectocarpus- Fucoxanthin
3.Ulothrix- Mannitol
4.Porphyra - Floridian starch

10.

Effect of light and dark rhythm on plants is known as:
1. Photonasty
2. Phototropism
3. Photoperiodism
4. Photomorphogenesis

11.

12.

Which one of the following is not an essential
mineral element for plants while the remaining
three are ?
1. Phosphorus
2. Iron
3. Manganese
4. Cadmium

13.

In mung bean, resistance to yellow mosaic virus, and powdery mildew was brought about by:
1.Mutation breeding
2.Biofortification
3.Tissue culture
4.Hybridization and selection

14.

Which of the following is expected to have the highest value (gm/$m^2$ /yr) in a grassland ecosystem: -
1. Tertiary production
2. Gross production (GP)
3. Net production (NP)
4. Secondary production

15.

Which one of the following pairs is wrongly
matched while the remaining three are correct ?
1. Agave - Bulbils
2. Penicillium - Conidia
3. Water hyacinth - Runner
4. Bryophyllum – Leaf buds

16.

17.

In photosynthesis, the light-independent reactions take place at
1. Thylakoid lumen
2. photosystem I
3. photosystem II
4. Stromal matrix

18.

19. Western Ghats have a large number of plants and animal species that are not found anywhere else. Which of the following term is used to notify such species?
1. Threatened species
2. Keystone species
3. Endemic species
4. Vulnerable species

20.

The transverse section of a plant shows following anatomical features :
a. Large number of scattered vascular bundles surrounded by bundle sheath.
b. Large conspicuous parenchymatous ground tissue.
c. Vascular bundles conjoint and closed.
d. Phloem parenchyma absent.
Identify the category of plant and its part :
1. Monocotyledonous root
2. Dicotyledonous stem
3. Dicotyledonous root
4. Monocotyledonous stem

21.

Which one of the following is wrong for fungi?
1. They are eukaryotic
2. All fungipossess a purely cellulosic cell wall
3. They are heterotrophic
4. They both are unicellular and multicellular

22.

Just as a person moves from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to:
1. Western Ghat
2. Meghalaya
3. Corbett National Park
4. Keoladeo National Park

23.

In the somatic cell cycle :-
1. DNA replication takes place in S-phase
2. A short interphase is followed by a long mitotic phase
3.$G_2$ phase follows mitotic phase
4. In$G_1$ phase, DNA content is double the amount of DNA present in the original cell

24.

Which of the following yields citric acid?
1. Penicillium citricum
2. Aspergillus niger
3. Saccharomyces
4. Azospirilium

25.

Practical purpose of taxonomy or classification is to :
1. facilitate the identification of unknown species
2. explain the origin of organisms
3. know the evolutionary history
4. identify medicinal plants

26.

The movement of ions against the concentration gradient will be :

27.

In light of the above statements, choose the correct answer from the options given below:

28.

''Good ozone'' is found in the :
1. Ionosphere
2. Mesosphere
3. Troposphere
4. Stratosphere

29.

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
(1) Peroxisomes
(2) Golgi bodies
(3) Polysomes
(4) Endoplasmic reticulum

30.

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
1. Glucose-6-phosphate
2. Fructose 1, 6-bisphosphate
3. Pyruvic acid
4. Acetyl Co-A

31.

Which of the following is without exception in Angiosperms : -
1. Presence of vessels
2. Double fertilisation
3. Secondary growth
4. Autotrophic nutrition

32.

Coconut milk factor is: -
1. An auxin
2. A gibberellin
3. Abscisic acid
4. Cytokinin

33.

Wind pollination is common

1. lilies
2. grasses
3. orchids
4. legumes

34.

Nitrogen fixing bacteria converts :
1.$N_2\to N{H}_3$
2.$N{H}_4^{+}\to Nitrates$
3.$N{O}_2\to N{O}_3$
4.$N{O}_3\to N_2$

35.

Which fungal disease spreads by seed and flowers : -
(1) Loose smut of Wheat
(2) Corn stunt
(3) Covered smut of Barley
(4) Soft rot of Potato

Botany - Section B

36.

The chief advantage of encystment to an Amoeba is:

37.

Assuming that fur colour of an animal is dark, range of colour shade and white. A cross is made between a male (AABBCC) with dark fur colour and a female (aabbcc) with white fur colour. What would be the fur colour of F₁ generation?
1. All intermediate colour
2. Range of colour shade
3. All dark colour
4. All white colour

38.

Main reason for disturbance of biological diversity :
1. Green house effect
2. Hunting
3. Soil erosion
4. Destruction of natural habitats

39.

During Meiosis 1, in which stage synapsis takes place?
1. Pachytene
2. Zygotene
3. Diplotene
4. Leptotene

40.

Regeneration of damaged growing grass following grazing is largely due to :
1.Lateral meristem
2.Apical meristem
3.Intercalary meristem
4.Secondary meristem

41.

Which one of the following statements is wrong?
1. Algae increase the level of dissolved oxygen in the immediate environment
2. Algin is obtained from red algae and carrageenan from brown algae
3. Agar-agar is obtained from Gelidium and Gracilaria
4. Laminaria and Sargassum are used as food

42.

Function of filiform apparatus is to:

43.

Three crops that contribute maximum to global food grain production are -
(1) Wheat, rice and maize
(2) Rice, maize and sorghum
(3) Wheat maize and sorghum
(4) Wheat, rice and barley

44. The flowers are Zygomorphic in:
a. Mustard
b. Gulmohar
c. Cassia
d. Datura
e. Chilly
Choose the correct answer from the options given below:
1. c, d, e only
2. a, b, c only
3. b, c only
4. d, e only

45.

Which one of the following mineral elements plays an important role in biological nitrogen fixation : -
1. Copper
2. Manganese
3. Zinc
4. Molybdenum

46.

47. The phenomenon by which the undividing parenchyma cells start to divide mitotically during plant tissue culture is called as :
1. Differentiation
2. Dedifferentiation
3. Redifferentiation
4. Secondary growth

48.

When water moves through a semipermeable membrane then which of the following pressure develops : -
1. O.P.
2. S.P.
3. T.P.
4. W.P.

49.

Which one of the following is an example of carrying out biological control of pests/diseases using microbes?
1. Trichoderma sp. against certain plant pathogens
2. Nucleopolyhedrovirus against white rust in Brassica
3. Bt-cotton to increase cotton yield
4. Ladybird beetle against aphids in mustard

50. What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?
1. Eight
2. Four
3. Six
4. Two

Zoology - Section A

51. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates
Reason (R): Notochord is replaced by vertebral column in the adult vertebrates
In the light of the above statements, choose the most appropriate answer from the options given below:
1. (A) is not correct but (R) is correct
2. Both (A) and (R) are correct and (R) is the correct explanation of (A)
3. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
4. (A) is correct but (R) is not correct

52.

Consider the following four statements (a–d) regarding kidney transplant and select the two correct ones out of these –
(a) Even if a kidney transplant is proper the recipient may need to take immunosuppresants for a long time
(b) The cell-mediated immune response is responsible for the graft rejection
(c) The B-lymphocytes are responsible for rejection of the graft
(d) The acceptance or rejection of a kidney transplant depends on specific interferons
The two correct statements are –
1. (b) and (c)
2. (c) and (d)
3. (a) and (c)
4. (a) and (b)

53.

54.

A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-D.

1. B- Synaptic connection; D- K⁺
2. A- Neurotransmitter; B- Synaptic cleft
3. C- Neurotransmitter; D- Ca⁺⁺
4. A- Receptor; C- Synaptic vesicles

55. Lippe's loop is a type of contraceptive used as:

56.

Function of Nucleases :
1. Break the polynucleotide chain by breaking the each terminal nucleotide
2. Breaks phosphodiester bond
3. Breaks peptide bonds
4. Breaks ester bonds

57.

Which of the following is an accumulation and release centre of neurohormones?
1. Posterior pituitary lobe
2. Intermediate lobe of the pituitary
3. Hypothalamus
4. Anterior pituitary lobe

58.

Widal test is carried out to test:
1. Malaria
2. Diabetes mellitus
3. HIV/AIDS
4. typhoid fever

59.

The extinct human who lived 100000 to 40000 years ago, in Europe, Asia, and parts of Africa, with short stature, heavy eyebrows, retreating for heads, large jaws with heavy teeth, stocky bodies, a lumbering gait, and stooped posture was:
1. Homo habilis
2. Neanderthal human
3. Cro-Magnon humans
4. Ramapithecus

60.

Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of -
1. Oxytocin from maternal pituitary
2. Oxytocin from foetal pituitary
3. Relaxin from placenta
4. Estrogen from placenta

61.

Figure shows schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function/s.

1. B-Pulmonary artery- takes blood from heart to lungs, PO₂ = 90mm Hg
2. C-Vena Cava- takes blood from body parts to right auricle, PCO₂ = 45mm Hg
3. D-Dorsal aorta- takes blood from heart to body parts,PO₂ = 95mm Hg
4. A- Pulmonary vein - takes impure blood from body parts,PO₂ = 60mm Hg

62.

Which type of tissue is correctly matched with its location?

63.

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
1. (c) and (d)
2. (a), (b) and (d)
3. only (d)
4. (a) and (b)

64.

Carrier ions like Na+ facilitate the absorption of substance like
1. amino acids and glucose
2. glocose and fatty acids
3. fatty acids and glycerol
4. fructose and some amino acids

65.

The H-zone in the skeletal muscle fibre is due to:
1. The central gap between myosin filaments in the A-band.
2. The central gap between actin filaments extending through myosin filaments in the A-band.
3. Extension of myosin filaments in the central portion of the A-band
4. The absence of myofibrils in the central portion of A-band.

66.

Golden rice is a genetically modified crop plant where the incorporated gene is meant for the biosynthesis of:

67.

Metagenesis refers to
1. The presence of different morphic forms
2. Alternation of generation between asexual and sexual phrases of an organism
3. Occurrence of a drastic change in the form during post-embryonic development
4. Presence of segmented body and parthenogenic mode of reproduction

68.

Which of the following statements is correct?
1. The descending limb of loop of Henle is impermeable to water.
2.The ascending limb of loop of Henle is permeable to water.
3. The descending limb of loop of Henle is permeable to electrolytes.
4. The ascending limb of loop of Henle is impermeable to water.

69.

Phospholipids are esters of glycerol with :-
1. Three carboxylic acid residues
2. Two carboxylic acid residues and one phosphate group
3. One carboxylic acid residue and two phosphate groups
4. Three phosphate groups

70.

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive :-
1. K⁺ and Na⁺ out of the cell
2. Na⁺ into the cell
3. Na⁺ out of the cell
4. K⁺ into the cell

71.

Copper ions released from copper-releasing Intra Uterine Devices (IUDs)
1. make uterus unsuitable for implantation
2. increase phagocytosis of sperms
3. suppress sperm motility
4. prevent ovulation

72. Separation of DNA, fragments is done by a technique known as :
1. Polymerase Chain Reaction
2. Recombinant technology
3. Southern blotting
4. Gel electrophoresis

73.

CCK and secretin secreted by :
1. Stomach
2. Ileum
3. Duodenum
4. Colon

74.

75.

Which of the following statement is true :
1. Homo erectus is direct ancestor of Homo sapiens
2. Neanderthal man is direct ancestor of modern man
3. Australopithecous is direct ancestor of modern man
4. Fossils of cromagnon man first found in Ethiopia

76.

Sertoli cells are regulated by the pituitary hormone known as :
1. FSH
2. GH
3. Prolactin
4. LH

77.

In which point, pulmonary artery is different from pulmonary vein :
1. Its lumen is broad
2. Its wall is thick
3. It has valves
4. It does not possess endothelium

78.

Choose the correctly matched pair:
1. Tendon-Specialized connective tissue
2. Adipose tissue-Dense connective tissue
3. Areolar tissue- Loose connective tissue
4. Cartilage- Loose connective tissue

79.

Asthma may be attributed to
1. allergic reaction of the mast cells in the lungs
2. inflammation of the trachea
3. accumulation of fluid in the lungs
4. bacterial infection of the lungs

80.

Kwashiorkor disease is due to
1. simultaneous deficiency of proteins and fats
2. simultaneous deficiency of proteins and calories
3. deficiency of carbohydrates
4. protein deficiency not accompanied by calorie deficiency

81.

Three of the following pairs of the human
skeletal parts are correctly matched with their
respective inclusive skeletal category and one
pair is not matched. Identify the non-matching
pair.

82.

Which one of the following is now being commercially produced by biotechnological procedures -
1. Morphine
2. Quinine
3. Insulin
4. Nicotine

83.

84.

85.

Which of the following bond is formed as a result of reaction of carboxyl group of one amino acid with amino group of other amino acid with elimination of water?
1. Phosphodiester Bond
2. Hydrogen Bond
3. Glycosidic Bond
4. Peptide Bond

Zoology - Section B

86.

87.

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female ?
1. Fertilization of the ovum
2. Maintenance of the hypertropical endometrial lining
3. Maintenance of high concentration of sex-hormones in the blood stream
4. Retention of well-developes corpus luteum

88.

Drug called 'Heroin' is synthesized by:
1. nitration of morphine
2. methylation of morphine
3. acetylation of morphine
4. glycosylation of morphine

89.

90.

Identify the properties of a good vector used in rDNA technology
(a) It should have origin of replication supporting a high copy number
(b) It should have preferably more than '2' recognition sites
(c) The restriction sites in vector should be in the antibiotic- resistant genes
(d) It should have suitable marker genes
(e) It should be easy to isolate and purify
Choose the most appropriate answer from the options given below:
1. (a), (c) and (e) only
2.(c), (d) and (e) only
3.(a), (b) and (c) only
4.(a), (c) , (d) and (e) only

91.

Ommatidia serve the purpose of photoreception in : -
1. Cockroach
2. Frog
3. Humans
4. Sunflower

92.

93.

Figure shows human urinary system with structures labelled A to D. Select option which correctly identifies them and gives their characteristics and / or functions.

1. B-pelvis - broad funnel shaped space inner to hilum, directly connected to loops of Henle.
2. C- Medulla- inner zone of kidney and contains complex nephrons.
3. D- Cortex- outer part of kidney and does not contain any part of nephrons.
4. A- Adrenal gland- located at the anterior part of kidney; secretes catecholamines which stimulate glycogen breakdown.

94.

Match the following columns and select the correct option

95.

Which of the following disorders represents decrease in respiratory surface due to damaged alveolar walls ?
1. Hypocapnia
2. Bronchitis
3. Asthma
4. Emphysema

96. Match List - I with List - II with respective to methods of Contraception and their respective actions.

Choose the correct answer from the options given below:

97.

Arteries are best defined as the vessels which

1. carry blood away from the heart to different organs
2. break up into capillaries which reunite to form a vein
3. carry blood from one visceral organ to another visceral organ
4. supply oxygenated blood to the different organs

98.

Stimulation of a muscle fiber by a motor neuron occurs at:
1. the neuromuscular junction
2. the transverse tubules
3. the myofibril
4. the sacroplasmic reticulum

99.

100.

Match List -I with List - II.

Choose the correct answer from the options given below.
(a) (b) (c) (d)
1. (ii) (i) (iv) (iii)
2. (iv) (iii) (i) (ii)
3. (iv) (i) (ii) (iii)
4. (i) (iv) (iii) (ii)

Chemistry - Section A

101.

The correct IUPAC name of the given compound is-

1. 3-Ethyl-4-ethenylheptane
2. 3-Ethyl-4-propylhex-5-ene
3. 3-(1-Ethyl propyl) hex-1-ene
4. 4-Ethyl-3-propylhex-1-ene

102.

Percentage of C, H & N are given as follows :
C = 40% H = 13.33% N = 46.67%
The empirical formula will be :
1.$C{H}_{2}N$
2.$C_2{H}_{4}N$
3.$C{H}_{4}N$
4.$C{H}_{3}N$

103.

The reaction A → B follows first order kinetics. The time taken for 0.8 mol of A to produce 0.6 mol of B is 1 hour. The time taken for conversion of 0.9 mol of A to produce 0.675 mol of B will be:
1. 1 hour
2. 0.5 hour
3. 0.25 hour
4. 2 hour

104. The order of energy absorbed which is responsible for the color of complexesis:
\((A) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\\ (B) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{en})\right]^{2+} and\\ (C) \ \left[\mathrm{Ni}(\mathrm{en})_{3}\right]^{2+}\)
1. B > A > C
2. A > B > C
3. C > B > A
4. C > A > B

105.

If the solubility of MX₂ – type electrolytes is 0.5 × 10^–4 Mole/lit. then K_sp of electrolytes will be: -
1.$5\times {10}^{-12}$
2.$25\times {10}^{-10}$
3.$1\times {10}^{-13}$
4.$5\times {10}^{-13}$

106.

For the disproportionation of copper:
2Cu⁺ → C u²⁺ + C u$,E°$is :-
(Given$E°$forCu⁺²/Cu is 0.34 V & Eº for Cu⁺²/Cu⁺is 0.15 V )
1. 0.49 V
2. – 0.19 V
3. 0.38 V
4. – 0.38 V

107.

What is the entropy change (in JK^–1 mol^–1) when one mole of ice is converted into water at 0ºC ? (The enthalpy change for the conversion of ice to liquid water is 6.0 KJ mol^–1 at 0ºC)
1. 20.13
2. 2.013
3. 2.198
4. 21.98

108.

Consider the following compounds

Hyperconjugation occurs in
1. I only
2. II only
3. III only
4. I and III

109.

Copper has face-centered cubic (fcc) lattice with interatomic spacing equal to 2.54Å. The value of lattice constant for this lattice is-
(1) 3.59Å
(2) 2.54 Å
(3) 1.27 Å
(4) 5.08 Å

110.

Which of the following metal ions activates many enzymes participating in the oxidation of glucose to produce ATP and with Na it is also responsible for the transmission of nerve signals:
1. Copper
2. Calcium
3. Potassium
4. Iron

111.

The method of zone refining of metals is based on the principle of:

112.

Which is the correct thermal stability order for${\mathrm{H}}_2\mathrm{E}\left(\mathrm{E}=\mathrm{O},\mathrm{S},\mathrm{Se},\mathrm{Te}\mathrm{and}\mathrm{Po}\right)?$
1.${\mathrm{H}}_2\mathrm{Se}<{\mathrm{H}}_2\mathrm{Te}<{\mathrm{H}}_2\mathrm{Po}<{\mathrm{H}}_2\mathrm{O}<{\mathrm{H}}_2\mathrm{S}$
2.${\mathrm{H}}_2\mathrm{S}<{\mathrm{H}}_2\mathrm{O}<{\mathrm{H}}_2\mathrm{Se}<{\mathrm{H}}_2\mathrm{Te}<{\mathrm{H}}_2\mathrm{Po}$
3.${\mathrm{H}}_2\mathrm{O}<{\mathrm{H}}_2\mathrm{S}<{\mathrm{H}}_2\mathrm{Se}<{\mathrm{H}}_2\mathrm{Te}<{\mathrm{H}}_2\mathrm{Po}$
4.${\mathrm{H}}_2\mathrm{Po}<{\mathrm{H}}_2\mathrm{Te}<{\mathrm{H}}_2\mathrm{Se}<{\mathrm{H}}_2\mathrm{S}<{\mathrm{H}}_2\mathrm{O}$

113.

Which one of the following is most reactive towards electrophilic attack?
1.
2.
3.
4.

114.

The correct option for the total pressure (in atm) in a mixture of 4 g O₂ and 2 g H₂confined in a total volume of one litre at 0$°$C is :
[Given R=0.082 L atm mol^-1 K^-1, T=273 K]
1. 25.18
2. 26.02
3. 2.518
3. 2.602

115.

HCl was passed through a solution of CaCl₂, MgCl₂, and NaCl. Compound(s) that get crystallize is/are-
1. Only NaCl
2. OnlyMgCl₂
3. NaCl,MgCl₂, and CaCl₂
4. BothMgCl₂ andCaCl₂

116.

Among the following, the narrow-spectrum antibiotic is:
1. chloramphenicol
2. penicillin G
3. ampicillin
4. amoxicillin

117.

Which of the following is the correct order of dipole moment?
1.$N{H}_3<B{F}_3<N{F}_3<H_{2}O$
2.$B{F}_3<N{F}_3<N{H}_3<H_{2}O$
3.$B{F}_3<N{H}_3<N{F}_3<H_{2}O$
4.$H_{2}O<N{F}_3<N{H}_3<B{F}_3$

118.

A 0.0020 m aqueous solution of an ionic compound Co(NH₃)₅(NO₂)Cl freezes at -0.0073 ^oC. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be -
(K_f = -1.86^oC/m)
1. 2
2. 3
3. 4
4. 1

119.

The orientation of an atomic orbital is governed by :
1. azimuthal quantum number
2. spin quantum number
3. magnetic quantum number
4. principal quantum number

120.

What is the colloidal solution of fog?
1. Gas in liquid
2. Solid in gas
3. Gas in gas
4. Liquid in gas

121.

Match List-I with List-II

Choose the correct answer from the options given below.

122.

CH₃— O — CH(CH₃)₂+ HI→ B (Product)
The product 'B' in the above mentioned reaction is-
1.CH₃OH + (CH₃)₂CHl
2.lCH₂OCH(CH₃)₂
3.CH₃OC(CH₃)₂
4.CH₃l + (CH₃)₂CHOH

123.

The liquefied gas that is used in dry cleaning along with a suitable detergent is-
1. Water gas
2. Petroleum gas
3. NO₂
4. CO₂

124.

Which one of the following on reduction with lithium aluminium hydride yield a secondary amine?
1. Nitroethane
2. Methylisocyanide
3. Acetamide
4. Methyl cyanide

125. Predict the order of reactivity of the following four isomers towards S_N2 reaction.
(I) CH₃CH₂CH₂CH₂Cl
(II) CH₃CH₂CH(Cl)CH₃
(III) (CH₃)₂CHCH₂Cl
(IV) (CH₃)₃CCl

126.

The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order
1.$L{i}^{+}<K^{+}<N{a}^{+}<R{b}^{+}$
2.$R{b}^{+}<K^{+}<N{a}^{+}<L{i}^{+}$
3.$K^{+}<N{a}^{+}<R{b}^{+}<L{i}^{+}$
4.$N{a}^{+}<L{i}^{+}<K^{+}<R{b}^{+}$

127.

If the oxidation numbers of A, B, and C are + 2, +5, and –2 respectively, then the possible formula of the compound is:
1. A₂(BC₂)₂
2. A₃(BC₄)₂
3. A₂(BC₃)₂
4. A₃(B₂C)₂

128. \(Na_2B_4O_7\xrightarrow{\text{ heat }~~}X+NaBO_2 \)
in the above reaction the product "X" is :
1. H₃BO₃
2. B₂O₃
3. Na₂B₂O₅
4. NaB₃O₅

129.

The correct IUPAC name of the following compound is:

1. 2-ethylhex-3-en-4-one
2. 4-methylhex-3-en-2-one
3. 4-ethylpent-3-en-2-one
4. 3-methylhex -3-en-4-one

130. Which statement regarding polymers is not correct?

131. The IUPAC name of an element with atomic number 119 is:

1. ununoctium
2. ununennium
3. unnilennium
4. unununnium

132.

In the following reaction
${\mathrm{H}}_3\mathrm{CC}\equiv \mathrm{CH}\underset{873\mathrm{K}}{\overset{\mathrm{Red}\mathrm{Hot}\mathrm{Iron}\mathrm{Tube}}{\to }}\mathrm{A}$
The number of ($\sigma$) bonds present in the product (A) is-
1. 21
2. 9
3. 24
4. 18

133.

A mixture of gases contains H₂and O₂gases in the ratio of 1 : 4 (w/w). The molar ratio of the two gases in the mixture will be:
1. 1:4
2. 4:1
3. 16:1
4. 2:1

134.

A first-order reaction has a specific reaction rate of 10^-2sec^-1. How much time will it take for 20 g of the reactant to reduce to 5 g?
1. 138.6 sec
2. 346.5 sec
3. 693.0 sec
4. 238.6 sec

135.

A complex of ions among the following that is expected to absorb visible light, is:
(At. no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)
1. [Sc(H₂O)₃(NH₃)₃]³⁺
2. [Ti(en)₂(NH₃)₂]⁴⁺
3. [Cr(NH₃)₆]³⁺
4. [Zn(NH₃)₆]²⁺

Chemistry - Section B

136.

What is the carbonyl compound with the strongest C-O bond?
1.FeCO₅
2. [Mn(CO)₆]⁺
3. Cr(CO)₆
4. [V(CO)₆]^-

137.

The bond energy of H—H and Cl-Cl is 430 kJ mol^-1and 240 kJ mol^-1respectively and ΔH_ffor HCl is -90 kJ mol^-1. The bond enthalpy of HCl is :
1. 290$kJmo{l}^{-1}$
2. 380$kJmo{l}^{-1}$
3. 425$kJmo{l}^{-1}$
4. 245$kJmo{l}^{-1}$

138.

$$\begin{gathered} Pb{O}_2\to PbO∆G_{298}<0 \\ Sn{O}_2\to SnO∆G_{298}>0 \end{gathered}$$
The most probable oxidation state of Pb & Sn will be-
1.${\mathrm{Pb}}^{+4},{\mathrm{Sn}}^{+4}$
2.${\mathrm{Pb}}^{+4},{\mathrm{Sn}}^{+2}$
3.${\mathrm{Pb}}^{+2},{\mathrm{Sn}}^{+2}$
4.${\mathrm{Pb}}^{+2},{\mathrm{Sn}}^{+4}$

139.

What is the reaction between benzaldehyde and acetophenone known as in the presence of dilute NaOH?
1. Cannizzaro's reaction
2. Cross Cannizzaro's reaction
3. Cross aldol condensation
4. Aldol condensation

140.

Correct order of$I^{st}$ IP among following elements Be, B, C, N, O is : -
1. B < Be < C < O < N
2. B < Be < C < N < O
3. Be < B < C < N < O
4. Be < B < C < O < N

141.

If the half life of a substance is 77 days then it's decay constant (days^-1) will be :
1. 0.9
2. 0.09
3. 0.009
4. 0.013

142.

Number of atoms per unit cell in BCC structure is: -
1. 9
2. 4
3. 2
4. 1

143.

Which of the following reactions cannot form new carbon-carbon bonds?
1. Reimer-Tiemann reaction
2. Cannizaro reaction
3. Wurtz reaction
4. Friedel-Crafts acylation

144.

The catalytic activity of transition metals is due to :

145.

Molar conductivities$(\wedge {°}_m)$ at infinite dilution of NaCl, HCl and$C{H}_{3}COONa$ are 126.4, 425.9 and 91.0 S cm²mol^-1respectively.$(\wedge {°}_m)$ for$C{H}_{3}COOH$ will be:
1.$180.5Sc{m}^{2}mo{l}^{-1}$
2.$290.8Sc{m}^{2}mo{l}^{-1}$
3.$390.5Sc{m}^{2}mo{l}^{-1}$
4.$425.5Sc{m}^{2}mo{l}^{-1}$

146.

Match list-I with list-II:

Choose the correct answer from the options given below:

147.

Which of the following compounds has the highest oxidation number for nitrogen?
1.${\mathrm{N}}_2{\mathrm{H}}_4$
2.${\mathrm{NH}}_3$
3.${\mathrm{N}}_3\mathrm{H}$
4.${\mathrm{NH}}_2\mathrm{OH}$

148.

149.

In which of the following the hydration energy is higher than the lattice energy?
1.$BaS{O}_4$
2.$MgS{O}_4$
3.$CaS{O}_4$
4.$SrS{O}_4$

150.

Which of the following elements is present as an impurity to the maximum extent in the pig Iron?
1. Carbon
2. Silicon
3. Phosphorus
4. Manganese

Physics - Section A

151.

Young’s modulus of steel is twice that of brass. Two wires of the same length and of the same area of cross-section, one of steel and another of brass, are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of:
1. \(1:2\)
2. \(2:1\)
3. \(4:1\)
4. \(1:1\)

152.

An electron moves on a straight-line path XY as shown. The abcd is a coil adjacent to the path of electrons. What will be the direction of current if any, induced in the coil?

1. abcd
2. adcb
3. The current will reverse its direction
as the electron goes past the coil
4. No current included

153.

For a black body at temperature 727ºC, its radiating power is 60 watt and temperature of surrounding is 227ºC. If temperature of black body is changed to 1227ºC then its radiating power will be : -
1. 304 W
2. 320 W
3. 240 W
4. 120 W

154.

Rohini satellite is at a height of 500 kmand Insat-B is at a height of 3600 kmfrom the surface of the earth. The relation between their orbital velocity (\(v_R,~v_i\)) is :
1.\(v_R>v_i\)
2.\(v_R<v_i\)
3.\(v_R=v_i\)
4. No relation

155.

A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then:

156.

In the given circuit, the reading of voltmeter V₁and V₂are 300 V each. The reading of the voltmeter V₃and ammeter A are respectively:

1. 150 V, 2.2 A
2. 220 V, 2.2 A
3. 220 V, 2.0 A
4. 100 V, 2.0 A

157.

The angular width of the central maximum in the Fraunhofer diffraction for\(\lambda=6000~\mathrm{\mathring{A}}\) is\(\theta_0\). When the same slit is illuminated by another monochromatic light, the angular width decreases by 30%. The wavelength of this light is:
1.\(1800~\mathrm{\mathring{A}}\)
2.\(4200~\mathrm{\mathring{A}}\)
3.\(420~\mathrm{\mathring{A}}\)
4.\(6000~\mathrm{\mathring{A}}\)

158.

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf of the two cells is:
1. 5 : 4
2. 3 : 4
3. 3 : 2
4. 5 : 1

159. A ball is projected with a velocity of\(10\) ms^-1at an angle of \(60^\circ\) with the vertical direction. Its speed at the highest point of its trajectory will be:
1. \(10\) ms^-1
2. zero
3.\(5\sqrt3\)ms^-1
4.\(5\)ms^-1

160.

${}_{n}X_m$emitted one$\alpha and2\beta$particles, then it will become :
1.${}_{n}X_{m-4}$
2.${}_{n-1}X_{m-1}$
3.${}_{n}Z_{m-4}$
4. None of these

161.

When a body of mass 'm' just begins to slide as shown, match list-I with list-II:

Choose the correct answer from the options given below:

162.

To get output Y=1 for the following circuit, the correct choice for the input is:

1. A = 1, B = 0, C = 0
2. A = 1, B = 1, C = 0
3. A = 1, B = 0, C = 1
4. A = 0, B = 1, C = 0

163.

A particle of mass m, charge Q, and kinetic energy T enters a transverse uniform magnetic field of induction$\overrightarrow{\mathrm{B}}$. What will be the kinetic energy of the particle after 3 seconds?
1. 3T
2. 2T
3. T
4. 4T

164.

The relation amongst the three elements of Earth's magnetic field, namely horizontal component H, vertical component V and dip angle$\delta$is: ($B_E$=total magnetic field)
1. V=$B_E$tan$\delta$, H=$B_E$
2. V=$B_E$sin$\delta$, H=$B_E$cos$\delta$
3. V=$B_E$cos$\delta$, H=$B_E$sin$\delta$
4. V=$B_E$, H=$B_E$tan$\delta$

165. The energy that will be ideally radiated by a \(100\) kW transmitter in \(1\) hour is:
1. \(1\times 10^{5}\) J
2.\(36\times 10^{7}\)J
3.\(36\times 10^{4}\)J
4.\(36\times 10^{5}\)J

166. Identify the function which represents a non-periodic motion.
1. \(e^{-\omega t}\)
2. \(sin\omega t\)
3. \(sin\omega t+cos\omega t\)
4. \(sin(\omega t+\pi/4)\)

167. The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s^-1. If the viscosity of oil at room temperature is 0.9 kg m^-1 s^-1, the viscous drag force is:
1. 8.48 × 10^-3 N
2. 8.48 × 10^-5 N
3. 4.23 × 10^-3 N
4. 4.23 × 10^-6 N

168.

The two nearest harmonics of a tube closed at one end and open at the other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?
1. 20 Hz
2. 30 Hz
3. 40 Hz
4. 10 Hz

169.

If the angle between the vector $\overrightarrow{\mathrm{A}}\text{and}\overrightarrow{\mathrm{B}}$ is θ, the value of the product $(\overrightarrow{\mathrm{B}}\times \overrightarrow{\mathrm{A}})\cdot \overrightarrow{\mathrm{A}}$ is equal to
1. zero
2. BA²sinθcosθ
3. BA²cosθ
4. BA²sinθ

170.

A Carnot engine having an efficiency of\(\frac{1}{10}\)as heat engine, is used as a refrigerator. If the work done on the system is \(10\) J, the amount of energy absorbed from the reservoir at a lower temperature is:
1. \(90\) J
2. \(99\) J
3. \(100\) J
4. \(1\) J

171.

For which one of the following Bohr model is not valid?
1. Singly ionised helium atom$\left(H{e}^{+}\right)$
2. Deuteron atom
3. Singly ionised neon atom$\left(N{e}^{+}\right)$
4. Hydrogen atom

172.

A square surface of side\(L\)(m) is in the plane of the paper. A uniform electric field\(\vec{E}\)(V/m), also in the plane of the paper, is limited only to the lower half of the square surface, (see figure). The electric flux in SI units associated with the surface is:

1.$E{L}^2/\left(2{\epsilon }_0\right)$
2.$E{L}^2/2$
3. zero
4.$E{L}^2$

173.

The velocity of electromagnetic radiation in a medium of permittivity${\epsilon }_0$and permeability${\mu }_0$is given by:
1.$\sqrt{\frac{{\mathrm{\epsilon }}_{\mathrm{o}}}{{\mathrm{\mu }}_{\mathrm{o}}}}$
2.$\sqrt{{\mathrm{\mu }}_{\mathrm{o}}{\mathrm{\epsilon }}_{\mathrm{o}}}$
3.$\frac{1}{\sqrt{{\mathrm{\mu }}_{\mathrm{o}}{\mathrm{\epsilon }}_{\mathrm{o}}}}$
4.$\sqrt{\frac{{\mathrm{\mu }}_{\mathrm{o}}}{{\mathrm{\epsilon }}_{\mathrm{o}}}}$

174.

Dimensions of resistance in an electrical circuit, in terms of dimension of massM, lengthL, time Tand currentI, would be:
1.$\left[{\mathrm{ML}}^2{\mathrm{T}}^{-3}{\mathrm{I}}^{-1}\right]$
2.$\left[{\mathrm{ML}}^2{\mathrm{T}}^{-2}\right]$
3.$\left[{\mathrm{ML}}^2{\mathrm{T}}^{-1}{\mathrm{I}}^{-1}\right]$
4.$\left[{\mathrm{ML}}^2{\mathrm{T}}^{-3}{\mathrm{I}}^{-2}\right]$

175.

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure.

The change in internal energy of the gas during the transition is:

176.

A rod of length 10 cm lies along the principal axis of concave mirror of focal length 10 cm in such a way that its end closer to the pole is 20 cm away from the mirror. The length of the image is -
1. 15 cm
2. 2.5 cm
3. 5 cm
4. 10 cm

177.

178.

A car moves fromXtoYwith a uniform speedv_uand returns to Xwith a uniform speedv_d. The average speed for this round trip is :
1.$\frac{2{\mathrm{v}}_{\mathrm{d}}{\mathrm{v}}_{\mathrm{u}}}{{\mathrm{v}}_{\mathrm{d}}+{\mathrm{v}}_{\mathrm{u}}}$
2.$\sqrt{{\mathrm{v}}_{\mathrm{u}}{\mathrm{v}}_{\mathrm{d}}}$
3.$\frac{{\mathrm{v}}_{\mathrm{d}}{\mathrm{v}}_{\mathrm{u}}}{{\mathrm{v}}_{\mathrm{d}}+{\mathrm{v}}_{\mathrm{u}}}$
4.$\frac{{\mathrm{v}}_{\mathrm{u}}+{\mathrm{v}}_{\mathrm{d}}}{2}$

179.

A capacitor of 2 µF is charged as shown in the figure. When the switch S is turned to position 2, the percentage of its stored energy dissipated is:

180.

When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L+l). The elastic potential energy stored in the extended wire is:
1.$\frac{1}{2}\mathrm{MgL}$
2. Mgl
3. MgL
4.$\frac{1}{2}\mathrm{Mgl}$

181.

The magnetic flux linked with a coil (in Wb) is given by the equation $\mathrm{\varphi }=5{\mathrm{t}}^2+3\mathrm{t}+60$.
The magnitude of induced emf in the coil at t= 4 s will be:
1. 33 V
2. 43 V
3. 108 V
4. 10 V

182.

The quantities of heat required to raise the temperature of two solid copper spheres of radii${\mathrm{r}}_1$and${\mathrm{r}}_2$$({\mathrm{r}}_1=1.5{\mathrm{r}}_2)$through 1 K are in the ratio:
1.$\frac{9}{4}$
2.$\frac{3}{2}$
3.$\frac{5}{3}$
4.$\frac{27}{8}$

183.

The time period of a geostationary satellite is 24 h at a height 6$R_E$($R_E$is the radius of the earth) from the surface of the earth. The time period of another satellite whose height is 2.5$R_E$from the surface, will be:
1. 6$\sqrt{2}h$
2. 12$\sqrt{2}h$
3.$\frac{24}{2.5}h$
4.$\frac{12}{2.5}h$

184.

185. An inductor of inductance 2 mH is connected to a 220 V, 50 Hz ac source. Let the inductive reactance in the circuit is X₁. If a 220 V dc source replaces the ac source in the circuit, then the inductive reactance in the circuit is X₂. X₁ and X₂, respectively, are:
1. 6.28 \(\Omega\), zero
2. 6.28 \(\Omega\), infinity
3. 0.628 \(\Omega\), zero
4. 0.628 \(\Omega\), infinity

Physics - Section B

186.

Each of the two strings of lengths 51.6 cm and 49.1 cm is tensioned separately by 20 N of force. The mass per unit length of both the strings is the same and equals 1 g/m. When both the strings vibrate simultaneously, the number of beats is:
1. 5
2. 7
3. 8
4. 3

187.

$\begin{array}{l}\text{If}|\overrightarrow{\mathrm{A}}\times \overrightarrow{\mathrm{B}}|=\sqrt{3}\overrightarrow{\mathrm{A}}\cdot \overrightarrow{\mathrm{B}}\text{, then the value of}\\ |\overrightarrow{\mathrm{A}}+\overrightarrow{\mathrm{B}}|\text{is:}\end{array}$
1.${({\mathrm{A}}^2+{\mathrm{B}}^2+\frac{\mathrm{AB}}{\sqrt{3}})}^{1/2}$
2. A+B
3.${({\mathrm{A}}^2+{\mathrm{B}}^2+\sqrt{3}\mathrm{AB})}^{1/2}$
4.${({\mathrm{A}}^2+{\mathrm{B}}^2+\mathrm{AB})}^{1/2}$

188.

Taking into account the significant figures, what is the value of (9.99m - 0.0099m)?
1. 9.98 m
2. 9.980 m
3. 9.9 m
4. 9.9801 m

189.

An electric dipole of moment \(p\) is placed in an electric field of intensity \(E.\) The dipole acquires a position such that the axis of the dipole makes an angle$\theta$with the direction of the field. Assuming that the potential energy of the dipole to be zero when$\theta =90°$, the torque and the potential energy of the dipole will respectively be:
1.$pE\sin \theta ,-pE\cos \theta$
2.$pE\sin \theta ,-2pE\cos \theta$
3.$pE\sin \theta ,2pE\cos \theta$
4.$pE\cos \theta ,-pE\sin \theta$

190.

191.

A cycle wheel of radius \(0.5\) m is rotated with a constant angular velocity of \(10\) rad/s in a region of a magnetic field of \(0.1\) T which is perpendicular to the plane of the wheel. The EMF generated between its centre and the rim is:
1. \(0.25\) V
2. \(0.125\) V
3. \(0.5\) V
4. zero

192.

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100 °C, while the other one is at 0 °C. If the two bodies are brought into contact, then assuming no heat loss, the final common temperature is:
1.$50°\mathrm{C}$
2. more than$50°\mathrm{C}$
3. less than$50°\mathrm{C}$but greater than$0°\mathrm{C}$
4.$0°\mathrm{C}$

193.

If ${\mathrm{\lambda }}_{\mathrm{v}},{\mathrm{\lambda }}_{\mathrm{x}}\text{and}{\mathrm{\lambda }}_{\mathrm{m}}$ represent the wavelengths of visible light, x-rays and microwaves respectively, then:
1.${\lambda }_{\mathrm{m}}>{\lambda }_{\mathrm{x}}>{\lambda }_{\mathrm{v}}$
2.${\lambda }_v>{\lambda }_m>{\lambda }_x$
3.${\lambda }_v>{\lambda }_x>{\lambda }_m$
4.${\lambda }_{\mathrm{m}}>{\lambda }_{\mathrm{v}}>{\lambda }_{\mathrm{x}}$

194.

A ray of light travelling in the air has wavelength λ, frequency n, velocity v and intensity I. If this ray enters into water then these parameters are λ', n', v' and I' respectively. Which relation is correct?
1. λ = λ′
2. n = n′
3. v = v′
4. I = I′

195.

The moment of inertia of a thin uniform rod of mass \(M\) and length \(L\) about an axis passing through its mid-point and perpendicular to its length is \(I_0\). Its moment of inertia about an axis passing through one of its ends and perpendicular to its length is:
1.\(I_0+\frac{ML^2}{4}\)
2.\(I_0+2ML^2\)
3.\(I_0+ML^2\)
4.\(I_0+\frac{ML^2}{2}\)

196.

The electric field at a point on the equatorial plane at a distance \(r\) from the centre of a dipole having dipole moment$\overrightarrow{P}$is given by:
(r >> separation of two charges forming the dipole,\(\epsilon_{0} =\)permittivity of free space)
1.$\overrightarrow{\mathrm{E}}=\frac{\overrightarrow{\mathrm{P}}}{4\mathrm{\pi }{\mathrm{\epsilon }}_0{\mathrm{r}}^3}$
2.$\overrightarrow{\mathrm{E}}=\frac{2\overrightarrow{\mathrm{P}}}{4\mathrm{\pi }{\mathrm{\epsilon }}_0{\mathrm{r}}^3}$
3. $\overrightarrow{\mathrm{E}}=-\frac{\overrightarrow{\mathrm{P}}}{4\mathrm{\pi }{\mathrm{\epsilon }}_0{\mathrm{r}}^2}$
4.$\overrightarrow{\mathrm{E}}=-\frac{\overrightarrow{\mathrm{P}}}{4\mathrm{\pi }{\mathrm{\epsilon }}_0{\mathrm{r}}^3}$

197.

A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to${\mathrm{L}}_1$when mass M is suspended from its free end. The expression for Young's modulus is:
1.$\frac{\mathrm{Mg}({\mathrm{L}}_1-\mathrm{L})}{\mathrm{AL}}$
2.$\frac{\mathrm{MgL}}{{\mathrm{AL}}_1}$
3.$\frac{\mathrm{MgL}}{\mathrm{A}({\mathrm{L}}_1-\mathrm{L})}$
4.$\frac{{\mathrm{MgL}}_1}{\mathrm{AL}}$

198.

The fraction of the original number of radioactive atoms that disintegrates (decays) during the average lifetime of a radioactive substance will be:
1. \(\frac{1}{e}\)
2. \(\frac{1}{1+e}\)
3. \(\frac{e-1}{e+1}\)
4. \(\frac{e-1}{e}\)

199.

If two springs, A and B$(K_A=2K_B),$ are stretched by the same suspended weights, then the ratio of work done in stretching is equal to:
1. 1 : 2
2. 2 : 1
3. 1 : 1
4. 1 : 4

200.

If a charged particle (charge q) is moving in a circle of radius R at a uniform speed v, then the value of its associated magnetic moment μ will be:
1.$\frac{\mathrm{qvR}}{2}$
2.${\mathrm{qvR}}^2$
3.$\frac{{\mathrm{qvR}}^2}{2}$
4.$\mathrm{qvR}$

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