4AB › Chemistry PYQ › CSIR-NET › June 2015

1. Q1 — The pair of light source and atomizer resulting highest sensitivity to atomic absorption spectrometric · Analytical Chemistry
2. Q2 — Differential pulse polarography (DPP) is more sensitive than D.C. Polarography (DCP). Consider following · Analytical Chemistry
3. Q3 — Considering the following parameters with reference to the fluorescence of a solution: 1. Molar absorptivity · Analytical Chemistry
4. Q4 — The ¹¹⁹Sn NMR chemical shift (approximately in ppm) corresponding to (η⁵-Cp)₂Sn (relative to Me₄Sn) is · Inorganic Spectroscopy
5. Q5 — The correct relation between the following compounds is · General Organic Chemistry
6. Q6 — The correct order of heat of hydrogenation for the following compounds is (I) (II) (III) (IV) · General Organic Chemistry
7. Q7 — The hydrocarbon among the following having conformationally locked chair-boat-chair form is · General Organic Chemistry
8. Q8 — Identify two enantiomers among the following compounds · General Organic Chemistry
9. Q9 — The correct statements about conformations X and Y of 2-butanone are (X) (Y) (A) X is more stable than Y (B) · General Organic Chemistry
10. Q10 — The correct order of magnitude of 'A values' for the given substituents in cyclohexane derivatives is X = · General Organic Chemistry
11. Q11 — The correct order of pKa values for the compounds X, Y and Z is (X) (Y) (Z) · General Organic Chemistry
12. Q12 — Biogenetic precursors for the natural product umbelliferone among the following are umbelliferone · Natural Products
13. Q13 — Antitubercular drug(s) among the following is (are) · Natural Products
14. Q14 — The major product formed in following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
15. Q15 — The major product formed in following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
16. Q16 — The major product formed in following reaction is · Reagents, Reaction Mechanisms & Named Reactions
17. Q17 — The products A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
18. Q18 — The products A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
19. Q19 — The major product formed in following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
20. Q20 — The major product formed in following reaction is · Reagents, Reaction Mechanisms & Named Reactions
21. Q21 — The major product formed in following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
22. Q22 — The structures of A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
23. Q23 — Structure of the major product in the following synthetic sequence is · Reagents, Reaction Mechanisms & Named Reactions
24. Q24 — The lowest energy-state of an atom with electronic configuration ns¹ np¹ has the term symbol · Atomic and Molecular Term Symbol
25. Q25 — The electric-dipole allowed transition among the following is · Atomic and Molecular Term Symbol
26. Q26 — The term symbol for the first excited state of Be with the electronic configuration 1 s² 2 s¹ 3 s¹ is · Atomic and Molecular Term Symbol
27. Q27 — The temperature-dependence of a reaction is given by k=A T² exp (-E₀ / R T) The activation energy Ea of the · Chemical Kinetics
28. Q28 — For a reaction, 2 A+B → 3 Z, if the rate of consumption of A is 2 × 10⁻⁴ mol dm⁻³ s⁻¹ the rate of formation · Chemical Kinetics
29. Q29 — In a photochemical reaction, radicals formed according to the equation C₄H₁₀ + hν ⇌ 2 C₂H₅ C₂H₅ + C₂H₅ k₂ · Chemical Kinetics
30. Q30 — The correct Δ G for the cell reaction involving steps Zn(s) → Zn²⁺(aq)+2e Cu²⁺(aq)+2e → Cu(s) is · Electrochemistry
31. Q31 — The temperature-dependence of an electrochemical cell potential is · Electrochemistry
32. Q32 — Conductometric titration of a strong acid with a strong alkali (MOH) shows linear fall of conductance up to · Electrochemistry
33. Q33 — The product C₂x · σxy (C₂x is the two-fold rotation axis around the x-axis and σxy is the xy mirror plane) is · Group Theory
34. Q34 — IR active normal modes of methane belong to the irreducible representation: · Group Theory
35. Q35 — For a reaction on a surface At low pressure of H, the rate is proportional to · Surface Chemistry
36. Q36 — Energy of interaction of colloidal particles as a function of distance of separation can be identified as (1) · Surface Chemistry
37. Q37 — Match the action of H₂ O₂, in aqueous medium given in column A with the oxidation/reduction listed in column B · Acids and Bases
38. Q38 — Water plays different roles in the following reactions. (i) 2H₂O+Ca → Ca²⁺+2OH⁻+H₂ (ii) nH₂O+Cl → [Cl(H₂O)n]⁻ · Acids and Bases
39. Q39 — Differential pulse polarography (DPP) is more sensitive than D.C. Polarography (DCP). Consider following · Analytical Chemistry
40. Q40 — Considering the following parameters with reference to the fluorescence of a solution: 1. Molar absorptivity · Analytical Chemistry
41. Q41 — The biological functions of carbonic anhydrase and carboxypeptidase A, respectively, are · Bioinorganic Chemistry
42. Q42 — The Fe-Nporphyrin bond distances in the deoxy and oxy-hemoglobin, respectively, are · Bioinorganic Chemistry
43. Q43 — The total number of metal ions and the number of coordinated imidazole units of histidine in the active site · Bioinorganic Chemistry
44. Q44 — The geometries of [Br₃]⁺and [I₅]⁺respectively, are · Chemical Bonding
45. Q45 — In transition metal phosphine (M-PR₃) complexes, the back-bonding involves donation of electrons from · Coordination Chemistry
46. Q46 — The lowest energy-state of an atom with electronic configuration ns¹np¹ has the term symbol · Coordination Chemistry
47. Q47 — Match the complexes given in column I with the electronic transitions (mainly responsible for their colours) · Coordination Chemistry
48. Q48 — Among the complexes, (A) K₄ [Cr(CN)₆], K₄ [Fe(CN)₆], (C) K₃ [Co(CN)₆], (D) K₄ [Mn(CN)₆], and Jahn-Teller · Coordination Chemistry
49. Q49 — The complex [Fe(phen)₂(NCS)₂] (phen 1,10-phenanthroline) shows spin cross-over behaviour CFSE and at μeff 250 · Coordination Chemistry
50. Q50 — The ¹¹⁹Sn NMR chemical shift (approximately in ppm) corresponding to (η⁵-Cp)₂Sn (relative to Me₄Sn) is · Inorganic Spectroscopy
51. Q51 — The reduced form of a metal ion M in a complex is NMR active. On oxidation, the complex gives an EPR signal · Inorganic Spectroscopy
52. Q52 — Mössbauer spectrum of a metal complex gives information about · Inorganic Spectroscopy
53. Q53 — Consider the following statements with respect to uranium (A) UO₂⁺ disproportionates more easily than UO₂²⁺ · Lanthanides and Actinides
54. Q54 — Consider the following statements for (NH₄)₂ [Ce (NO₃)₆](Z) · Lanthanides and Actinides
55. Q55 — All forms of phosphorus upon melting, exist as · Main Group Elements
56. Q56 — The correct set of pseudo halide anions is · Main Group Elements
57. Q57 — The binding modes of NO in 18 electron compounds [Co(CO)₃(NO)] and [Ni(η⁵-Cp)(NO)], respectively, are · Organometallic Compounds
58. Q58 — The role of copper salt as co-catalyst in Wacker process is · Organometallic Compounds
59. Q59 — For typical Fischer and Schrock carbenes, consider the following statements A. Oxidation state of metal is · Organometallic Compounds
60. Q60 — The refluxing of RhCl₃.3 H₂ O with an excess of PPh₃, in ethanol gives a complex A. Complex A and the valence · Organometallic Compounds
61. Q61 — The β-hydrogen elimination will be facile in · Organometallic Compounds
62. Q62 — The reaction [Co(CN)₅ H₂ O]²⁻+X⁻ → [Co(CN)₅ X]²⁻+H₂ O follows a/an · Organometallic Compounds
63. Q63 — According to Wade's theory the anion [B₁₂ H₁₂]²⁻ adopts · Organometallic Compounds
64. Q64 — The reaction of SbCl₃, with 3 equivalents of EtMgBr yields compound X. Two equivalents of SbI₃ react with one · Organometallic Compounds
65. Q65 — The following statements are given regarding the agostic interaction C-H----Ir observed in [Ir (Ph₃ P)₃ Cl] · Organometallic Compounds
66. Q66 — Match column A (coupling reactions) with column B (reagents) The correct match is: · Organometallic Compounds
67. Q67 — Amongst the following (A) [Mn (η⁵-Cp)(CO)₃] (B) [Os (η⁵-Cp)₂] (C) [Ru (η⁵-Cp)₂] and (D) [Fe (η⁵-Cp)₂] the · Organometallic Compounds
68. Q68 — Total number of vertices in metal clusters [Ru₆(C)(CO)₁₇] [Os₅(C)(CO)₁₅] and [Ru₅(C)(CO)₁₆] are 6,5 and 5 · Organometallic Compounds
69. Q69 — The reductive elimination of Ar-R (coupled product) from A is facile when · Organometallic Compounds
70. Q70 — The least probable product from A on reductive elimination is A · Organometallic Compounds
71. Q71 — With respect to σ and π bonding in Pt III in the structure given below, which of the following represent the · Organometallic Compounds
72. Q72 — The ¹ H ~ NMR spectrum of a dilute solution of a mixture of acetone and dichloromethane in CDCl₃ exhibits two · Organic Spectroscopy
73. Q73 — Intense band generally observed for a carbonyl group in the IR spectrum is due to · Organic Spectroscopy
74. Q74 — Number of signals in the ¹³ C {¹ H} NMR spectrum of (R)-4-methylpentan- 2-ol are · Organic Spectroscopy
75. Q75 — An organic compounds shows following spectral data: IR (cm⁻¹): 1680 ¹ H NMR (CDCl₃): δ 7.66(m, 1 H), 7.60(m · Organic Spectroscopy
76. Q76 — The major product formed in the following reaction is · Pericyclic Reactions
77. Q77 — The temperature-dependence of a reaction is given by k=AT² exp (-E₀ / RT) The activation energy Ea of the · Chemical Kinetics
78. Q78 — For a reaction, 2 A+B → 3 Z, if the rate of consumption of A is 2 × 10⁻⁴ mol dm⁻³ s⁻¹ the rate of formation · Chemical Kinetics
79. Q79 — For a given ionic strength, (I) rate of reaction is given by log k/(k₀)=-4 × 0.51 I1 / 2. Which of the · Chemical Kinetics
80. Q80 — The intensity of a light beam decreases by 50% when it passes through a sample of 1.0 cm path length. The · Chemical Kinetics
81. Q81 — According to transition state theory, the temperature-dependence of pre-exponential factor (A) for a reaction · Chemical Kinetics
82. Q82 — In a photochemical reaction, radicals formed according to the equation C₄ H₁₀+hv ⇌ 2 C₂ H₅ C₂ H₅+C₂ H₅ k₂ C₂ · Chemical Kinetics
83. Q83 — For the following reaction, A k₋₁k₁⇌ 2 B; B k₂ C (d[B])/dt is given by · Chemical Kinetics
84. Q84 — If y₂=4 x and 0.1% error is incurred for x, the percentage error involved in y will be · Data Analysis
85. Q85 — In a conductometric experiment for estimation of acid dissociation constant of acetic acid, the following · Data Analysis
86. Q86 — The correct Δ G for the cell reaction involving steps Zn(s) → Zn²⁺(aq) + 2e Cu²⁺(aq) + 2e → Cu(s) · Electrochemistry
87. Q87 — The temperature-dependence of an electrochemical cell potential is · Electrochemistry
88. Q88 — Conductometric titration of a strong acid with a strong alkali (MOH) shows linear fall of conductance up to · Electrochemistry
89. Q89 — The symmetric rotor among the following is · Molecular Spectroscopy
90. Q90 — The nuclear g-factors of ₁ H and ₁₄ N are 5.6 and 0.40 respectively. If the magnetic field in an NMR · Molecular Spectroscopy
91. Q91 — The spectroscopic technique, by which the ground state dissociation energies of diatomic molecules can be · Molecular Spectroscopy
92. Q92 — The intrinsic viscosity depends on the molar mass as [η]=KMa. The empirical constants K and a are dependent on · Polymer Chemistry
93. Q93 — The stability of a lyophobic colloid is the consequence of · Polymer Chemistry
94. Q94 — Find the probability of the link in polymers where average values of links are (1) 10, (2) 50 and (3) 10 · Polymer Chemistry
95. Q95 — The correct form for a simple Langmuir isotherm is · Polymer Chemistry
96. Q96 — The correct expression for the product ((Mn) · ((Mw))) [ ((Mn... and ((Mw.. are the number average and weight · Polymer Chemistry
97. Q97 — The average end-to-end distance of a random coil polymer of 10⁶ monomers (in units of segment length) is · Polymer Chemistry
98. Q98 — Silver crystallizes in face-cantered cubic structure. The 2nd order diffraction angle of a beam of X-ray (λ=1 · Solid State Chemistry
99. Q99 — The single-particle partition function (f) for a certain system has the form f=Ave BT. The average energy per · Statistical Thermodynamics
100. Q100 — The indistinguishability correction in the Boltzmann formulation is incorporated in the following way: (N = · Statistical Thermodynamics
101. Q101 — For a reaction on a surface At low pressure of H, the rate is proportional to · Surface Chemistry
102. Q102 — Energy of interaction of colloidal particles as a function of distance of separation can be identified as (1) · Surface Chemistry
103. Q103 — Heat capacity of a species is independent of temperature if it is · Thermodynamics
104. Q104 — Consider the progress of a system along the path shown in the figure Δ S(B → C) for one mole of an ideal gas · Thermodynamics
105. Q105 — A thermodynamic equation that relates the chemical potential to the composition of a mixture is known as · Thermodynamics

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