4AB › Chemistry PYQ › CSIR-NET › December 2017

1. Q1 — The reactions given below, A Cl₂ + H₂O → HOCl + H₃O⁺ + Cl⁻ B Cl₂ + 2NH₃ → NH₂Cl + NH₄ + Cl⁻ are examples of · Acids and Bases
2. Q2 — Spectrophotometric monitoring is not suitable to determine the end point of titration of: · Analytical Chemistry
3. Q3 — Among ClO₃, XeO₃ and SO₃, species with pyramidal shape is/are? · Chemical Bonding
4. Q4 — Geometries of SNF₃ and XeF₂ O₂ respectively, are · Chemical Bonding
5. Q5 — The number of lines in EPR spectrum of CD₃ (ID=1) is · Inorganic Spectroscopy
6. Q6 — Among the structures given below, the one that corresponds to the most stable conformation of compound A is · General Organic Chemistry
7. Q7 — The correct order of stability of the following carbocations is (A) (B) (C) · General Organic Chemistry
8. Q8 — The number of optically active steroisomers possible for CH₃-CH(OH)-CH(OH)-CH(OH)-CH₃ is · General Organic Chemistry
9. Q9 — The following natural product Enterodiol is a · Natural Products
10. Q10 — The structure of ribonucleoside uridine is · Natural Products
11. Q11 — Correct sequence of reagents (i)-(iii) required for the conversion of A to B is A. Thionyl chloride, B · Natural Products
12. Q12 — For the successful synthesis of peptide linkage leading to the product A, the side chain of the amino acid D · Natural Products
13. Q13 — The correct match of the circled protons in Column P with ¹H NMR chemical shift (δ ppm) in Column Q is P I II · Organic Spectroscopy
14. Q14 — The kinetic product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
15. Q15 — Major products A and B in the following reaction sequence are: · Reagents, Reaction Mechanisms & Named Reactions
16. Q16 — The correct sequence of reagents required for conversion of A to B is: i) Thionyl chloride ii) · Reagents, Reaction Mechanisms & Named Reactions
17. Q17 — Correct sequence of steps involved in the following transformation is · Reagents, Reaction Mechanisms & Named Reactions
18. Q18 — The correct intermediate which leads to the product in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions
19. Q19 — The major product A and B in the following reaction sequence are: -> A -> -> B · Reagents, Reaction Mechanisms & Named Reactions
20. Q20 — The slope and intercept obtained from (1/Rate) against (1/substrate concentration) of an enzyme catalyzed · Chemical Kinetics
21. Q21 — Repeated measurement of Pb in a lake water sample gave 3.2, 5.2 and 7.2 ppb of Pb. Standard deviation in the · Data Analysis
22. Q22 — Four distinguishable molecules are distributed in energy level E1 and E2 with degeneracy of 2 & 3 · Statistical Thermodynamics
23. Q23 — Enthalpy is equal to · Thermodynamics
24. Q24 — To determine the bond parameters at 25°C, electron diffraction is generally unsuitable for both · Analytical Chemistry
25. Q25 — Spectrophotometric monitoring is not suitable to determine the end point of titration of: · Analytical Chemistry
26. Q26 — The peak area of differential thermal analysis curve is proportional to one or more of the following A. mass · Analytical Chemistry
27. Q27 — The correct statement for cytochrome c is · Bioinorganic Chemistry
28. Q28 — The active site structure for oxy-hemerythrin is: · Bioinorganic Chemistry
29. Q29 — The number of inorganic sulfides in cubane like ferredoxin and their removal method, respectively, are · Bioinorganic Chemistry
30. Q30 — Among ClO₃, XeO₃ and SO₃, species with pyramidal shape is/are? · Chemical Bonding
31. Q31 — According to Bent's rule, for p-block elements, the correct combination of geometry around the central atom · Chemical Bonding
32. Q32 — Allred-Rochow electronegativity of an element is A. directly proportional to the effective nuclear charge B · Chemical Bonding
33. Q33 — For the following complexes, the increasing order of magnetic moment (spin only value) is A. [TiF₆]³⁻ B · Coordination Chemistry
34. Q34 — The geometry around Cu and its spin state for K₃CuF₆ and KCuL₂, [H₂L=H₂NCONHCONH₂], respectively are: · Coordination Chemistry
35. Q35 — Consider the following statements with respect to the base hydrolysis of [CoCl (NH₃)₅] to [Co (NH₃)₅(OH)]²⁺ · Coordination Chemistry
36. Q36 — Considering the ambidentate behaviour of thiocyanante ion, the most stable structure among the following is · Coordination Chemistry
37. Q37 — For high spin and low spin d⁶ octahedral complexes (ML₆), the generally observed spin allowed transitions · Coordination Chemistry
38. Q38 — Br₂ with propanone forms a charge transfer complex and I₂ forms triiodide anion with I⁻. This implies that · Coordination Chemistry
39. Q39 — Mismatch among the following is · Coordination Chemistry
40. Q40 — Assuming ¹JPH > JPB the expected ³¹P NMR spectrum of H₃P.¹¹BCl₃ [for ¹¹B, I=3/2] is · Inorganic Spectroscopy
41. Q41 — The number of lines in EPR spectrum of CD₃ (ID=1) is · Inorganic Spectroscopy
42. Q42 — The ³¹ P{1 H} NMR spectrum of cis- [Pt (PEt₃)₂ Cl₂] (¹⁹⁵ Pt. (33.8% abundance) I=1 / 2; its other isotopes · Inorganic Spectroscopy
43. Q43 — Consider the following statements for [FeO₄]²⁻ (A) It is stable in the pH range 0-14 (B) It is stable in · Inorganic Spectroscopy
44. Q44 — Match lanthanides in Column I with their properties in Column II Correct match is · Lanthanides and Actinides
45. Q45 — Consider the following statement(s) for actinides (An): A. Oxidation states greater than +3 are more frequent · Lanthanides and Actinides
46. Q46 — The first ionization energy is the lowest for · Main Group Elements
47. Q47 — Choose the incorrect statement for the phosphomolybdate anion [PMo₁₂O₄₀]³⁻ · Main Group Elements
48. Q48 — Among the following nuclear reactions of thermal neutrons, the cross section is highest for: · Nuclear Chemistry
49. Q49 — In trigonal prismatic ligand field, the most stabilized d orbital is · Organometallic Compounds
50. Q50 — Among the following species isolobal to CH₂ are A. CpCr(CO)₂ B. CpCu C. Ni(CO)₂ D. Cr(CO)₄ E. Fe(CO)₄ · Organometallic Compounds
51. Q51 — In the complex [Pd(L-L)(Me)(Ph)], the bisphosphine (L-L) that does not allow reductive elimination of PhMe is · Organometallic Compounds
52. Q52 — According to Wade's rules, the cluster type and geometry of [Sn₉]⁴⁻, respectively, are · Organometallic Compounds
53. Q53 — The organic compound that displays following data is 'H-NMR (400 MHz): δ 7.38 (d), 7.25 (d), 1.29 (s) ppm · Organic Spectroscopy
54. Q54 — The correct match of the circled protons in Column P with ¹ H NMR chemical shift (δ ppm) in Column Q is P Q I · Organic Spectroscopy
55. Q55 — The following reaction involves · Pericyclic Reactions
56. Q56 — In the following transformation, the mode of electrocyclization A and the major product B are heat B · Pericyclic Reactions
57. Q57 — For a sequence of consecutive reactions, A k₁ I k₂ P, the concentration of I would be, by steady state · Chemical Kinetics
58. Q58 — Reaction between A and B is carried out for different initial concentrations and the corresponding half-life · Chemical Kinetics
59. Q59 — Repeated measurement of Pb in a lake water sample gave 3.2,5.2 and 7.2 ppb of Pb. Standard deviation in the · Data Analysis
60. Q60 — The correct statement among the following is · Electrochemistry
61. Q61 — The standard free energy of the reaction AgBr(s) → Ag⁺(aq)+Br⁻(aq) Is closest to. [E° (AgBr / Ag, Br⁻)=0.07 · Electrochemistry
62. Q62 — Conductivities of water and a saturated solution of a sparingly soluble salt AB₂ are 7 and 21 μ S m⁻¹ · Electrochemistry
63. Q63 — The correct relation involving symmetry operations · Group Theory
64. Q64 — For a point group, an incomplete character table is given below with one irreducible representation missing · Group Theory
65. Q65 — Given below is a specific vibrational mode of BCl₃ with ⊕ and ⊖ denoting movements of the respective atoms · Group Theory
66. Q66 — The molecule with a C 2 axis of symmetry among the following is · Group Theory
67. Q67 — A part of the character table of a point group (of order 4) is given below The four characters of Γ₄ are · Group Theory
68. Q68 — N₂O molecule belongs to the point group · Group Theory
69. Q69 — The -orbital πu of ethylene, when placed in the xy -plane with the C=C bond aligned to the x -axis · Group Theory
70. Q70 — The b1 u → b 2 g transition in ethylene is (Use Table 1) · Group Theory
71. Q71 — The molecule that will show Raman spectrum, but not IR spectrum, among the following is · Molecular Spectroscopy
72. Q72 — The normal mode of ethylene represented, by the figure below, is · Molecular Spectroscopy
73. Q73 — The pair that contains a spherical top and a symmetric top, among the following, is · Molecular Spectroscopy
74. Q74 — The g-factors of ¹ H and ¹³ C are 5.6 and 1.4 respectively. For the same value of the magnetic field · Molecular Spectroscopy
75. Q75 — A polymer has the following molar mass distribution The calculated number average molar mass (Mn)of the · Polymer Chemistry
76. Q76 — If the atoms/ions in the crystal are taken to be hard spheres touching each other in the unit cell, then the · Solid State Chemistry
77. Q77 — The separation of the (123) planes of an orthorhombic unit cell is 3.12 nm. The separation of (246) and (369) · Solid State Chemistry
78. Q78 — If all the lattice points of an FCC structure are occupied by uniform hard spheres that touch each other, the · Solid State Chemistry
79. Q79 — The (002) plane of an elemental FCC crystal diffracts X-rays (λ=0.154 nm) at Bragg angle 90°. the density of · Solid State Chemistry
80. Q80 — The term symbol for the ground state of a metal ion is ³ P₂. The residual entropy of a crystal of a salt of · Statistical Thermodynamics
81. Q81 — Four distinguishable molecules are distributed in energy level E₁ and E₂ with degeneracy of 2 & 3 · Statistical Thermodynamics
82. Q82 — Enthalpy is equal to · Thermodynamics
83. Q83 — In stretching of a rubber band, dG=Vdp-SdT+fdL. Which of the following relations in true? · Thermodynamics
84. Q84 — One mole of an ideal gas undergoes a cyclic process (ABCDA) starting from point A through 4 reversible steps · Thermodynamics

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