Q41. Match the following and choose the correct option:
Types of Placenta — Examples
A. Endothelio-chorial — (i) Rabbit
B. Haemo-chorial — (ii) Bat
C. Haemo-endothelial — (iii) Cat
Options (A, B, C):
A (i), (ii), (iii) B (iii), (ii), (i) C (ii), (i), (iii) D (ii), (iii), (i) E Question not attempted
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Correct answer: (iii), (ii), (i)
Q42. The protozoan parasite Nosema bombycis causes which disease in silk-worms?
A Flacherie B Muscardine C Pebrine D Polyhedrosis E Question not attempted
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Correct answer: Pebrine
Q43. The formula of tris (ethane-1, 2-diamine) cobalt (III) sulphate is:
A [Co(en)₃]SO₄ B [Co(en)₃]₃(SO₄)₂ C [Co(en)₃]₂(SO₄)₃ D [Co(H₂NCH₂CH₂NH₂)₃]₂(SO₄)₂ E Question not attempted
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Correct answer: [Co(en)₃]₂(SO₄)₃
Q44. The co-ordination entity which has d²sp³ hybridization and is diamagnetic in nature among the following is:
A [Mn(CN)₆]³⁻ B [Fe(CN)₆]³⁻ C [Co(C₂O₄)₃]³⁻ D [MnCl₆]³⁻ E Question not attempted
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Correct answer: [Co(C₂O₄)₃]³⁻
Q45. Which of the following is NOT a major function of the liver?
A Catabolic and excretory functions B Role in blood coagulation C Blood-cleansing functions D Secretion of enzymes E Question not attempted
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Correct answer: Secretion of enzymes
Q46. Which of the following sets of species has trigonal pyramidal shape?
A NO₃⁻ and CO₃²⁻ B PF₃ and SO₃²⁻ C SO₃²⁻ and SO₃ D PF₃ and CO₃²⁻ E Question not attempted
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Correct answer: PF₃ and SO₃²⁻
Q47. A mixture of gases contains 20 g Hydrogen and 20 g Helium in a cylinder. If total pressure of mixture of gases in cylinder is 15 bar, then partial pressure of hydrogen is:
A 5 bar B 7 bar C 10 bar D 12 bar E Question not attempted
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Correct answer: 10 bar
Q48. Which of the following crystal system has unit cell parameters a = b ≠ c and α = β = γ = 90°?
A Rhombohedral B Hexagonal C Orthorhombic D Tetragonal E Question not attempted
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Correct answer: Tetragonal
Q49. According to molecular orbital theory, the unpaired electron of N₂⁺ and O₂⁺ molecular species are present in which molecular orbitals, respectively?
A σ(2p); σ(2p) B σ(2p); π*(2p) C σ(2p); π(2p) D π*(2p); σ(2p) E Question not attempted
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Correct answer: σ(2p); π*(2p)
Q50. Match List-I with List-II and select the correct answer using the codes given below:
List-I (Molecule): (i) XeO₃, (ii) XeF₆, (iii) XeOF₄, (iv) XeF₂
List-II (State of Hybridization of Xenon): a. sp³d², b. sp³d, c. sp³d³, d. sp³
Codes (i, ii, iii, iv):
A a, c, d, b B d, b, a, c C d, c, a, b D b, a, c, d E Question not attempted
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Correct answer: d, c, a, b
Q51. Which of the following set of species has half-filled 4f-subshell?
A Eu²⁺ and Dy⁴⁺ B Tb³⁺ and Gd³⁺ C Eu²⁺ and Tb⁴⁺ D Tb⁴⁺ and Dy⁴⁺ E Question not attempted
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Correct answer: Eu²⁺ and Tb⁴⁺
Q52. Iodine oxidizes the thiosulphate ion into:
A sulphate ion B persulphate ion C tetrathionate ion D sulphite ion E Question not attempted
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Correct answer: tetrathionate ion
Q53. Oxoacid of phosphorous among the following which does not contain P-H bond:
A H₃PO₂ B H₃PO₃ C H₄P₂O₅ D H₄P₂O₇ E Question not attempted
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Correct answer: H₄P₂O₇
Q54. The following results have been obtained during the Kinetic study of the reaction 2A + B → C + D:
Experiment I: [A] = 0.1 mol L⁻¹, [B] = 0.1 mol L⁻¹, initial rate = 6.0 × 10⁻³ mol L⁻¹ min⁻¹
Experiment II: [A] = 0.3, [B] = 0.2, initial rate = 7.2 × 10⁻²
Experiment III: [A] = 0.3, [B] = 0.4, initial rate = 2.88 × 10⁻¹
Experiment IV: [A] = 0.4, [B] = 0.1, initial rate = 2.40 × 10⁻²
The rate law of the reaction would be:
A rate = k[A]²[B] B rate = k[A][B] C rate = k[A]²[B]² D rate = k[A][B]² E Question not attempted
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Correct answer: rate = k[A][B]²
Q55. 4% urea solution is isotonic with 12% solution of an organic compound A. The molecular weight of A would be:
A 240 B 180 C 150 D 120 E Question not attempted
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Correct answer: 180
Q56. In the metallurgy of Aluminium, what is mixed with purified Al₂O₃ to lower the melting point of the mixture?
A FeSiO₃ B Na₃AlF₆ C Al(OH)₃ D CaO E Question not attempted
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Correct answer: Na₃AlF₆
Q57. Which of the following statement is correct for physisorption?
A It results into unimolecular layer on adsorbent surface under high pressure. B High temperature is favourable for adsorption. C It is reversible in nature. D Enthalpy of adsorption is high. E Question not attempted
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Correct answer: It is reversible in nature.
Q58. The major product formed in the dehydrohalogenation of tert-pentyl-bromide is:
A 3-methyl-3-butene B 2-methyl-1-butene C 3-methyl-2-butene D 2-methyl-2-butene E Question not attempted
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Correct answer: 2-methyl-2-butene
Q59. The mechanism of coupling reaction of diazonium salt with phenol and aromatic amine is:
A Electrophilic addition B Electrophilic substitution C Nucleophilic addition D Nucleophilic substitution E Question not attempted
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Correct answer: Electrophilic substitution
Q60. E°cell of Zn, Zn²⁺ (1M) || Fe²⁺ (1M), Fe³⁺ (1M); Pt cell will be:
Given: E°Fe³⁺/Fe²⁺ = +0.77 V, E°Zn²⁺/Zn = −0.76 V
A +0.01 V B −0.01 V C +1.53 V D −1.53 V E Question not attempted
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Correct answer: +1.53 V