4AB › Chemistry PYQ › CSIR-NET › December 2016

1. Q1 — For the reaction, HX(aq) + H₂O(l) gives H₃O⁺ + X⁻ the highest value of [X⁻], when X⁻ is · Acids and Bases
2. Q2 — The primary analytical method (not using a reference) is: · Analytical Chemistry
3. Q3 — The oxidation state of gold in the following complex is · Chemical Bonding
4. Q4 — The numbers of triangular faces in square antiprism, icosahedron and tricapped trigonal prism (capped on · Chemical Bonding
5. Q5 — The expected number of ¹⁹F NMR spectral lines, including satellites, for [XeF₅]⁻ is [Abundance of ¹²⁹Xe · Inorganic Spectroscopy
6. Q6 — The correct order of the bond dissociation energies for the indicated C-H bond in following compounds is A B C · General Organic Chemistry
7. Q7 — The correct order of the acidity for the following compounds is A B C · General Organic Chemistry
8. Q8 — The correct statement about the following compound is · General Organic Chemistry
9. Q9 — Methyl groups in the following compound are · General Organic Chemistry
10. Q10 — Among the structures given below, the most stable conformation for the following compound is · General Organic Chemistry
11. Q11 — Correct match for the products of the reactions in Column A with the properties in Column B is (115) 1. i - · General Organic Chemistry
12. Q12 — Correct characteristics of the functional groups of adenine in DNA base pair are · Natural Products
13. Q13 — The correct match for the following is · Natural Products
14. Q14 — ¹H NMR spectrum of an organic compound recorded on a 500 MHz spectrometer showed a quartet with line · Organic Spectroscopy
15. Q15 — The major product formed in the following reaction is · Photochemical Reactions
16. Q16 — The major product formed in the dinitration of 4-bromotoulene is · Reagents, Reaction Mechanisms & Named Reactions
17. Q17 — The most stable product formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions
18. Q18 — The correct statement for the reactants A, B to give products C, D is · Reagents, Reaction Mechanisms & Named Reactions
19. Q19 — The correct sequence of reagents for the following conversion is: · Reagents, Reaction Mechanisms & Named Reactions
20. Q20 — Products of the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
21. Q21 — The correct starting compound A in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions
22. Q22 — The highest molecular orbitals for an excited electronic configuration of the oxygen molecule are [1 πg]¹ [3 · Atomic and Molecular Term Symbol
23. Q23 — According to the transition state theory, the plot with slope equal to (Δ H)/R is · Chemical Kinetics
24. Q24 — A reaction goes through the following elementary steps Assuming that steady state approximation can be · Chemical Kinetics
25. Q25 — For two reactions X(g)+Y(g) → Z(g) (1) M(g)+N(g) → P(g) (2) according to the collision theory, the ratio of · Chemical Kinetics
26. Q26 — Covariance is defined by the relation Cov(x,y)= xy- x y. Given the arbitrary constants A, B and C, Cov(x,y) · Data Analysis
27. Q27 — Given (i) Zn+4NH₃ → Zn(NH₃)₄²⁺+2e, Eo=1.03 V (ii) Zn → Zn²⁺+2e, Eo=0.763 V the formation constant of the · Electrochemistry
28. Q28 — ¹H NMR spectrum of an organic compound recorded on a 500 MHz spectrometer showed a quartet with line · Molecular Spectroscopy
29. Q29 — Vibrations of diatomic molecules are usually modelled by a harmonic potential. If the potential is given by · Molecular Spectroscopy
30. Q30 — The rotational constant and the fundamental vibrational frequency of HBr are, respectively, 10 cm⁻¹ and 2000 · Molecular Spectroscopy
31. Q31 — In a 200 MHz NMR spectrometer, a molecule shows two doublets separated by 2 ppm. The observed coupling · Molecular Spectroscopy
32. Q32 — The volume of a gas adsorbed on a solid surface is 10.0 mL, 11.0 mL, 11.2 mL, 14.5 mL and 22.5 mL at 1.0 · Surface Chemistry
33. Q33 — Saturation factor in neutron activation analysis is (A= induced radioactivity, ψ= neutron flux, σ= effective · Surface Chemistry
34. Q34 — The equation of state for one mole of a gas is given by P(V-b)=RT, where b and R are constants. The value of · Thermodynamics
35. Q35 — For the reaction, HX(aq)+H₂O(l) gives H₃O⁺+X⁻ the highest value of [X⁻], when X⁻ is · Acids and Bases
36. Q36 — Some molecules and their properties in liquid ammonia are given in columns A and B respectively. Match column · Acids and Bases
37. Q37 — The primary analytical method (not using a reference) is: · Analytical Chemistry
38. Q38 — In the catalytic hydration of CO₂ by carbonic anhydrase, CO₂ first interacts with · Bioinorganic Chemistry
39. Q39 — The number of inorganic Sulphur (or sulphide) atoms present in the metalloprotein active sites ofrubredoxin · Bioinorganic Chemistry
40. Q40 — From the following transformations, A. Epoxidation of alkene B. Dioldehydrase reaction C. Conversion of · Bioinorganic Chemistry
41. Q41 — Match the items in Column A with the appropriate items in Column B The correct answer is · Bioinorganic Chemistry
42. Q42 — Match the species in column X with their properties in column Y The correct answer is · Bioinorganic Chemistry
43. Q43 — The expected H-H-H bond angle in [H₃]⁺is · Chemical Bonding
44. Q44 — The HOMO (highest occupied molecular orbital) to LUMO (lowest unoccupied molecular orbital) electronic · Coordination Chemistry
45. Q45 — In the hydrolysis of trans- [Co(en)₂ Cl(A)]⁺if the leaving group is chloride, the formation of cis product is · Coordination Chemistry
46. Q46 — The nephelauxetic parameter β is highest for · Coordination Chemistry
47. Q47 — The ²Eg ← ⁴A2g transition in the electronic spectrum of [Cr (NH₃)₆]³⁺ occurs nearly at · Coordination Chemistry
48. Q48 — For [Ce (NO₃)₄ (OPPh₃)₂] from the following A. Its aqueous solution yellow-orange in B. Coordination number · Coordination Chemistry
49. Q49 — Consider the following statements for [FeO₄]⁴⁻ A. It is paramagnetic B. It has Td symmetry C. Adopts · Coordination Chemistry
50. Q50 — The spectroscopic ground state term symbols for the octahedral aqua complexes of Mn(II), Cr(III) and Cu(II) · Coordination Chemistry
51. Q51 — For OH⁻ catalysed SN1 conjugate base mechanism of [Co (NH₃)₅ Cl]²⁺, the species obtained in the first step of · Coordination Chemistry
52. Q52 — In the following redox reaction with an equilibrium constant K=2.0 × 10⁸ [Ru (NH₃)₆]²⁺+ [Fe (H₂ O₆)]³⁺ → [Ru · Coordination Chemistry
53. Q53 — The correct statement for a Fischer carbene complex is · Coordination Chemistry
54. Q54 — The highest molecular orbitals for an excited electronic configuration of the oxygen molecule are · Coordination Chemistry
55. Q55 — The reaction between PI₃, PSCl₃ and zinc powder gives P₃I₅ as one of the products. The solution state ³¹P NMR · Inorganic Spectroscopy
56. Q56 — For complex A, deuteration of NH protons does not alter the EPR spectrum. The number of hyper fine lines · Inorganic Spectroscopy
57. Q57 — Number of lines in the ¹⁹ F NMR spectrum of F₂ C(Br)-C(Br) Cl₂, at -120° C assuming it a mixture of static · Inorganic Spectroscopy
58. Q58 — The metal iodide with metallic lustre and high electrical conductivity is · Main Group Elements
59. Q59 — Consider the following statements for KC₈ : (A) It is paramagnetic (B) It has eclipsed layer structure (C) · Main Group Elements
60. Q60 — Among the following, choose the correct products that are formed in the reaction of S₂ Cl₂ with ammonia in · Main Group Elements
61. Q61 — The final product(s) of the reaction of arachno borane, B₄ H₁₀ with NMe₃ is/are · Main Group Elements
62. Q62 — The number of bridging ligand(s) and metal-metal bond(s) present in the complex · Organometallic Compounds
63. Q63 — The rate of alkene coordination to [PtCl₄]²⁻ is highest for · Organometallic Compounds
64. Q64 — Consider the following statements, I and II: I : [Rh(CO)₂ I₂]⁻ catalytically converts CH₃ I and CO to CH₃ COI · Organometallic Compounds
65. Q65 — The geometry of [ReH₉]²⁻ is · Organometallic Compounds
66. Q66 — According to isolobal analogy, the right set of fragments that might replace Co(CO)₃ in [Co₄(CO)₁₂] is · Organometallic Compounds
67. Q67 — According to Wade's rules, the correct structural types of [Co (η⁵-C₅ H₅) B₄ H₈] and [Mn (η²-B₃ H₈)(CO)₄] are · Organometallic Compounds
68. Q68 — The correct geometry of [Rh₆ C(CO)₁₅]²⁻ is · Organometallic Compounds
69. Q69 — Product A in the following reaction is 16 · Organometallic Compounds
70. Q70 — In the IR spectrum, carbonyl absorption band for the following compound appears at · Organic Spectroscopy
71. Q71 — 'H NMR spectrum of an organic compound recorded on a 500 MHz spectrometer showed a quartet with line · Organic Spectroscopy
72. Q72 — Number of signals present in the proton decoupled ¹³ C NMR spectrum of the following compound is · Organic Spectroscopy
73. Q73 — ¹ H ~ NMR spectrum of a mixture of benzene and acetonitrile shows two singlets of equal integration. The · Organic Spectroscopy
74. Q74 — O 48. The compound that exhibits following spectral data is ¹ H NMR: δ 8.0(d, J=12.3 Hz, 1 H). · Organic Spectroscopy
75. Q75 — The correct sequence of pericyclic reactions involved in the following transformation is · Pericyclic Reactions
76. Q76 — The major product formed in the following reaction is · Photochemical Reactions
77. Q77 — For a reaction with an activation energy of 49.8 kJ mol⁻¹, the ratio of the rate constants at 600 K and 300 · Chemical Kinetics
78. Q78 — According to the transition state theory, the plot with slope equal to (Δ H⁺)/R is · Chemical Kinetics
79. Q79 — A reaction goes through the following elementary steps A+B [k₋₁]k₁ 2 C (fast) A+C k₂ D (slow) Assuming that · Chemical Kinetics
80. Q80 — For two reactions X(g)+Y(g) → Z(g) (1) M(g)+N(g) → P(g) (2) according to the collision theory, the ratio of · Chemical Kinetics
81. Q81 — The rate of an acid-catalyzed reaction in aqueous solution follows the rate equation r=k [X⁺] [Y²⁻] [H⁺] If · Chemical Kinetics
82. Q82 — If the pre-exponential factor in Arrhenius equation is 1.6 × 10¹² s⁻¹, the value of the rate constant at · Chemical Kinetics
83. Q83 — In kinetic study of a chemical reaction, slopes are drawn at different times in the plot of concentration of · Chemical Kinetics
84. Q84 — Photochemical decomposition of HI takes place with the following mechanism HI+hv (Ia) → H+I H+HI k₁ H₂+I · Chemical Kinetics
85. Q85 — In a enzyme catalyzed reaction: E+S k₋₁k₁⇌ ES k₂ E+P k₂=3.42 × 10⁴ s⁻¹. If [E]₀=1.0 × 10⁻² mol dm⁻³, the · Chemical Kinetics
86. Q86 — Arrhenius equations for two chemical reactions are: k₁=A₁ e-E₁ / RT, k₂=A₂ e-E₂ / RT. If E₁>E₂ then at a · Chemical Kinetics
87. Q87 — Covariance is defined by the relation Cov(x, y)=-. Given the arbitrary constants A, B and C, Cov(x, y) will · Data Analysis
88. Q88 — If the specific conductances of a sparingly soluble (1:1) salt (MW =200 g mol⁻¹) in its saturated aqueous · Electrochemistry
89. Q89 — The ionic mobilities of NH₄⁺and HCO₃⁻are 6 × 10⁻⁴ V⁻¹ s⁻¹ and 5 × 10⁻⁴ V⁻¹ s⁻¹, respectively. The transport · Electrochemistry
90. Q90 — The ionic strength of a solution containing 0.008 M AlCl₃ and 0.005 M KCl is · Electrochemistry
91. Q91 — Given : (i) Zn+4 NH₃ → Zn (NH₃)₄ ²⁺+2 e, E⁰=1.03 V (ii) Zn → Zn²⁺+2 e, E°=0.763 V the formation of the · Electrochemistry
92. Q92 — The molecule that possesses symmetry S₄ element is · Group Theory
93. Q93 — For H₂O molecule, the electronic transition from the ground state to an excited state of B₁ symmetry is · Group Theory
94. Q94 — The pair of symmetry point groups that are associated with only polar molecules is · Group Theory
95. Q95 — ¹ H NMR spectrum of an organic compound recorded on a 500 MHz spectrometer showed a quartet with line · Molecular Spectroscopy
96. Q96 — Vibrations of diatomic molecules are usually modelled by a harmonic potential. If the potential is given by · Molecular Spectroscopy
97. Q97 — The transition that belongs to the Lyman series in the hydrogen-atom spectrum is · Molecular Spectroscopy
98. Q98 — The rotational constant and the fundamental vibrational frequency of HBr are, respectively, 10 cm⁻¹ and 2000 · Molecular Spectroscopy
99. Q99 — Among the following, both microwave and rotational Raman active molecule is · Molecular Spectroscopy
100. Q100 — In a 200 MHz NMR spectrometer, a molecule shows two doublets separated by 2 ppm. The observed coupling · Molecular Spectroscopy
101. Q101 — Distribution of molar masses in a typical polymer sample is shown below The A, B and C represent · Polymer Chemistry
102. Q102 — Each void in a two dimensional hexagonal close-packed layer of circles is surrounded by · Solid State Chemistry
103. Q103 — The sin 2 θ values obtained from X-ray powder diffraction pattern of a solid are 2 x, 4 x, 6 x, 8 x where x · Solid State Chemistry
104. Q104 — The weight of configuration with two ups and three down spins in a system with five spin 1/2 particles is · Statistical Thermodynamics
105. Q105 — Partition function of a one - dimensional oscillator having equispaced energy level with energy spacing equal · Statistical Thermodynamics
106. Q106 — When 1 × 10⁻⁵ g of a fatty acid (M=602.3 g/mol) was placed on water as a surface film, a monomolecular layer · Surface Chemistry
107. Q107 — Mark-Houwink equation ([n]=KMa) is used for the determination of · Surface Chemistry
108. Q108 — 22.5 mL at 1.0, 2.0, 3.0, 4.0 and 5.0 atm. pressure, respectively. These data are best represented by · Surface Chemistry
109. Q109 — The parameter which always decreases during a spontaneous process at constant S and V, is · Thermodynamics
110. Q110 — Triple point pressure of substances A, B, C and D are 0.2,0.5,0.8 and 1.2 bar, respectively. The substance · Thermodynamics
111. Q111 — The equation of state for one mole of a gas is given by PV-b=RT, where b and R are constants. The value of · Thermodynamics
112. Q112 — The partial derivative ((∂ T)/(∂ V))P is equal to · Thermodynamics
113. Q113 — i - P, ii - S, iii - R, iv - Q 2. i - P, ii - R, iii - Q, iv - S 3. i - Q, ii - R, iii - S, iv - P 4. i - S · Stereochemistry

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