4AB › Chemistry PYQ › CSIR-NET › December 2013

1. Q1 — Among the following, the correct acid strength trend is represented by · Acids and Bases
2. Q2 — Water plays different roles in the following reactions. (i) 2H₂O + Ca → Ca²⁺ + 2OH⁻ + H₂ (ii) nH₂O + Cl → · Acids and Bases
3. Q3 — In the atomic absorption spectroscopic estimation of Fe(III) using O₂ / H₂ flame, the absorbance decreases · Analytical Chemistry
4. Q4 — Among the following, an example of a hypervalent species is · Chemical Bonding
5. Q5 — The energy of 2s and 2p orbitals is the same for · Chemical Bonding
6. Q6 — Amongst the following, the compound which has the lowest energy barrier for the cis-trans isomerisation is: · General Organic Chemistry
7. Q7 — The IUPAC name of the compound given below is · General Organic Chemistry
8. Q8 — The two benzylic hydrogens HA and HB in the compounds I and II, are (I) (II) · General Organic Chemistry
9. Q9 — The absolute configuration of the two stereogenic (chiral) centres in the following molecule is · General Organic Chemistry
10. Q10 — The correct statement about the following molecule is · General Organic Chemistry
11. Q11 — Consider the following statements about cis- and trans-decalins (A) cis-isomer is more stable than · General Organic Chemistry
12. Q12 — The correct order for the rates of electrophilic aromatic substitution of the following compound is (I) (II) · General Organic Chemistry
13. Q13 — For estrone, among the statements A-C, the correct ones are · Natural Products
14. Q14 — The constituent amino acids present in the following dipeptide, respectively, are · Natural Products
15. Q15 — The major product B formed in the following reaction sequence, and overall yield of its formation are A B · Natural Products
16. Q16 — The major product formed in the sulfuric acid mediated rearrangement of the sesquiterpene saritonin A is · Natural Products
17. Q17 — The peptide A on reaction with 1-fluoro-2, 4-dinitrobenzene followed by exhaustive hydrolysis gave · Natural Products
18. Q18 — In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · Organic Spectroscopy
19. Q19 — The following reaction proceeds through a Δ · Pericyclic Reactions
20. Q20 — The number of nodes present in the highest occupied molecular orbital of 1, 3, 5-hexatriene in its ground · Pericyclic Reactions
21. Q21 — The major product formed in the following photochemical reaction is · Photochemical Reactions
22. Q22 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
23. Q23 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
24. Q24 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
25. Q25 — The major product formed in the following reaction sequence is: · Reagents, Reaction Mechanisms & Named Reactions
26. Q26 — In the following transformation, the reagent A and the major product B, respectively, are A → B · Reagents, Reaction Mechanisms & Named Reactions
27. Q27 — The major product formed in the following reaction sequence is: 1. BH₃, THF; H₂ O₂ / NaOH 2. Ph₃ P, DEAD · Reagents, Reaction Mechanisms & Named Reactions
28. Q28 — The major product formed in the following reaction sequence is: · Reagents, Reaction Mechanisms & Named Reactions
29. Q29 — The major product formed in the following reaction sequence is: · Reagents, Reaction Mechanisms & Named Reactions
30. Q30 — The major product formed in the following reaction sequence is: · Reagents, Reaction Mechanisms & Named Reactions
31. Q31 — According to Arrhenius equation (k= rate constant and T= temperature) · Chemical Kinetics
32. Q32 — A first order gaseous reaction is 25% complete in 30 minutes at 227°C and in 10 minutes at 237°C. The · Chemical Kinetics
33. Q33 — In the reaction between NO and H₂ the following data are obtained Experiment I: PH₂ constant Experiment II · Chemical Kinetics
34. Q34 — For a first order reaction A → products, the plot of ln (([A]t)/([A]₀)) vs time, where [A]₀ and [A]t to · Chemical Kinetics
35. Q35 — The limiting molar conductivities of NaCl, NaI and RbI are 12.7, 10.8 and 9.1 mS m² mol⁻¹, respectively. The · Electrochemistry
36. Q36 — The number of ways in which four molecules can be distributed in two different energy levels is : · Statistical Thermodynamics
37. Q37 — The chemical potential (μi) of the ith component is defined as · Thermodynamics
38. Q38 — Among the following, the correct acid strength trend is represented by · Acids and Bases
39. Q39 — Match the action of H₂ O₂, in aqueous medium given in column A with the oxidation/reduction listed in column B · Acids and Bases
40. Q40 — Correct statement for 'Inductively Coupled Plasma Atomic Emission Spectroscopy' is · Analytical Chemistry
41. Q41 — In the atomic absorption spectroscopic estimation of Fe(III) using O₂ / H₂ flame, the absorbance decreases · Analytical Chemistry
42. Q42 — Patients suffering from Wilson's disease have · Bioinorganic Chemistry
43. Q43 — High dose of dietary supplement ZnSO₄, for the cure of Zn deficiency · Bioinorganic Chemistry
44. Q44 — L-DOPA is used for treatment of · Bioinorganic Chemistry
45. Q45 — Oxidised form of enzyme catalase (structure A); prepared by the reaction of [Fe(P)]⁺(P= porphyrin) with H₂ O₂ · Bioinorganic Chemistry
46. Q46 — The molecule in which the bond order increases upon addition of an electron · Chemical Bonding
47. Q47 — If a homonuclear diatomic molecule is oriented along the Z-axis, the molecular orbital formed by linear · Chemical Bonding
48. Q48 — According to VSEPR theory, the geometry (with lone pair) around the central iodine in I₃⁺and I₃⁻ ions · Chemical Bonding
49. Q49 — An octahedral metal ion M²⁺ has magnetic moment of 4.0 B.M. The correct combination of metal ion and · Coordination Chemistry
50. Q50 — For an electronic configuration of two non-equivalent π electronics [π¹, π¹] which of the Following terms is · Coordination Chemistry
51. Q51 — Among the following, the correct combination of complex and its color is · Coordination Chemistry
52. Q52 — MnCr₂ O₄ is likely to have a normal spinel structure because · Coordination Chemistry
53. Q53 — Compounds K₂ Ba [Cu (NO₂)₆] (A) and Cs₂ Ba [Cu (NO₂)₆] (B) exhibit tetragonal elongation and tetragonal · Coordination Chemistry
54. Q54 — The most appropriate structure for the complex [Pt₂(NH₃)₂(NCS)₂(PPh₃)₂] is · Coordination Chemistry
55. Q55 — The ground state forms of Sm and Eu respectively, are · Lanthanides and Actinides
56. Q56 — The reaction of FeCl₃ · 6 H₂ O with SOCl₂ yields. · Main Group Elements
57. Q57 — Among the molten alkali metals, the example of an immiscible pair (in all proportions)is · Main Group Elements
58. Q58 — Treatment of ClF₃ with SbF₅ leads to the formation of a/an · Main Group Elements
59. Q59 — The reason for the chemical inertness of gaseous nitrogen at room temperature is best given · Main Group Elements
60. Q60 — Commonly used scintillator for measuring radiation is · Main Group Elements
61. Q61 — Two tautomeric forms of phosphorus acid are · Main Group Elements
62. Q62 — The solid state structure of aluminum fluoride is · Main Group Elements
63. Q63 — The orbital interactions shown below represent · Main Group Elements
64. Q64 — In a specific reaction, hexachlorocyclotriphosphazene, N₃P₃Cl₆ was reacted with a metal fluoride to obtain · Main Group Elements
65. Q65 — Xenon forms several fluorides and oxofluorides which exihibit acidic behaviour. The correct sequence of · Main Group Elements
66. Q66 — Number of isomeric derivatives possible for the neutral closo-carborane, C₂ B₁₀ H₁₂ is · Main Group Elements
67. Q67 — For higher boranes 3c-2e 'BBB' bond may be a part of their structures. In B₅ H₉, the number of such electron · Main Group Elements
68. Q68 — The bond order of the metal-metal bond in the dimeric complex [Re₂ Cl₄ (PMe₂ Ph)₄] is · Organometallic Compounds
69. Q69 — Which of the following in NOT suitable as catalyst for hydroformylation? · Organometallic Compounds
70. Q70 — In a cluster, H₃CoRu₃(CO)₁₂ total number of electrons considered to be involved in its formation is · Organometallic Compounds
71. Q71 — Among the following clusters, A= [(H) Co₆(CO)₁₅] B= [(H)₂ Os₆(CO)₁₈] C= [(H)₂ Os₅(CO)₁₆] H is encapsulated in · Organometallic Compounds
72. Q72 — The correct statement regarding terminal/bridging CO groups in solid mathrmCo₄(CO)₁₂ and mathrmIr₄(CO)₁₂ is · Organometallic Compounds
73. Q73 — The electrophile Ph₃ C reacts with [ (η⁵-C₅ H₅) Fe(CO)₂ (CDMe₂)]⁺to give a product A. The product A is formed · Organometallic Compounds
74. Q74 — Among the following, the correct statement is · Organometallic Compounds
75. Q75 — Substitution of L with other ligands will be easiest for the species · Organometallic Compounds
76. Q76 — Reaction of Ph₂PCH₂CH₂PPh₂ with [RhCl(CO)₂]₂ in a 2:1 molar ratio gives a crystalline solid A. The IR · Organometallic Compounds
77. Q77 — On reducing Fe₃(CO)₁₂ with an excess of sodium, a carbonylate ion is formed. The iron is isoelectronic with · Organometallic Compounds
78. Q78 — In the IR spectrum, carbonyl absorption band for the following compound appears at · Organic Spectroscopy
79. Q79 — An organic compound having the molecular formula C₁₀ H₁₄ exhibited two singlets in the ¹ H NMR spectrum, and · Organic Spectroscopy
80. Q80 — An organic compound (C₈ H₁₀ O₂), which does not change the color of ferric chloride solution, · Organic Spectroscopy
81. Q81 — Methyl 4-oxopentanoate exhibited signals at δ 208, 172, 51, 37, 32 and 27 ppm in its ¹³ C NMR spectrum. The · Organic Spectroscopy
82. Q82 — The conditions A-B, required for the following pericyclic reactions are · Pericyclic Reactions
83. Q83 — The number of π electrons participating and the pericyclic mode in the following reaction are · Pericyclic Reactions
84. Q84 — The major product formed in the following reaction sequence is · Pericyclic Reactions
85. Q85 — The major product formed in the following photochemical reaction is · Photochemical Reactions
86. Q86 — A first order gaseous reaction is 25% complete in 30 minutes at 227 oC and in 10 minutes at 237° C. The · Chemical Kinetics
87. Q87 — In the reaction between NO and H₂ the following data are obtained Experiment I: PH₂ constant Experiment II · Chemical Kinetics
88. Q88 — Examine the following first order consecutive reactions. The rate constant (in s⁻¹ units) for each step is · Chemical Kinetics
89. Q89 — In the Lineweaver-Burk plot of (initial rate) ⁻¹ vs. (initial substrate concentration) ⁻¹ for an enzyme · Chemical Kinetics
90. Q90 — The fluorescence lifetime of a molecule in a solution is 5 × 10⁻⁹ s. The sum of all the noradiative rate · Chemical Kinetics
91. Q91 — The masses recorded when a substance is weighed 4 times are 15.8, 15.4, 15.6 and 16.0 mg. The variance · Data Analysis
92. Q92 — In a potentiometric titration, the end point is obtained by observing · Electrochemistry
93. Q93 — Electrolysis of an aqueous solution of 1.0 M NaOH results in · Electrochemistry
94. Q94 — The cell voltage of Daniel cell [Zn |ZnSO₄(aq) | CuSO₄(aq) | Cu] is 1.07 V. If reduced potential of Cu²⁺ Cu · Electrochemistry
95. Q95 — Consider the cell: 3 equilibrium constant for the reaction: Zn+2 Fe³⁺ ⇌ Zn²⁺+2 Fe²⁺ at 25° C would be close to · Electrochemistry
96. Q96 — The limiting molar conductivities of NaCl, NaI and RbI are 12.7,10.8 and 9.1 mS m² mol⁻¹, respectively. The · Electrochemistry
97. Q97 — The transition that is allowed by x-polarized light in trans-butadiene is (The character table for C2h is · Group Theory
98. Q98 — The molecule with the smallest rotation partition function at any temperature among the following is: · Molecular Spectroscopy
99. Q99 — The atomic masses of fluorine and hydrogen are 19.0 and 1.0 amu, respectively (1 amu=1.67 × 10⁻²⁷ kg). The · Molecular Spectroscopy
100. Q100 — The C=O bond length is 120 pm in CO₂. The moment of inertia of CO₂ would be close to (masses of C and O are · Molecular Spectroscopy
101. Q101 — The orbital with two radial and two angular nodes is · Quantum Chemistry
102. Q102 — Consider a two-dimensional harmonic oscillator with potential energy V(x, y)=1/2 kx x²+1/2 ky y². If ψ_nx(x) · Quantum Chemistry
103. Q103 — The quantum mechanical virial theorem for a general potential V(x, y, z) is given by (∂ v)/(∂ x)+y (∂ v)/(∂ · Quantum Chemistry
104. Q104 — Consider a particle in a one dimensional box of length 'a' with the following potential V(x)=ω x<0 V(x)=ω x>a · Quantum Chemistry
105. Q105 — The most probable value of 'r' for an electron in 1s orbital of hydrogen atom is · Quantum Chemistry
106. Q106 — The angular momentum operator Ly · Quantum Chemistry
107. Q107 — The energy for a single electron excitation in cyclopropenium cation in Huckel theory is · Quantum Chemistry
108. Q108 — When Frenkel defects are created in an otherwise perfect ionic crystal, the density of the ionic crystal · Solid State Chemistry
109. Q109 — A compound of M and X atoms has a cubic unit cell. M atoms are at the corners and body centre position and X · Solid State Chemistry
110. Q110 — The angle at which the first order Bragg reflection is observed from (110) plane in a simple cubic unit cell · Solid State Chemistry
111. Q111 — Both NaCl and KCl crystallize with the fcc structure. However, the X-ray powder diffraction pattern of NaCl · Solid State Chemistry
112. Q112 — An element exists in two crystallographic - modifications with FCC and BCC structures. The ratio of the · Solid State Chemistry
113. Q113 — Metallic gold crystallizes in fcc structure with unit cell dimension of 4.00 Å. The atomic radius of gold is · Solid State Chemistry
114. Q114 — The term symbol for ground state dinitrogen cation radical (N₂+), is · Statistical Thermodynamics
115. Q115 — The volume of a gas adsorbed on a solid surface is 10.0 mL, 11.0 mL, 11.2 mL, 14.5 mL and · Surface Chemistry
116. Q116 — Michael Faraday observed that the colour of colloidal suspensions of gold nanoparticles changes with the size · Surface Chemistry
117. Q117 — The molecule that has the smallest diffusion coefficient in water is · Surface Chemistry
118. Q118 — The correct thermodynamics relation among the following is · Thermodynamics
119. Q119 — The heat capacity of 10 mol of an ideal gas at a certain temperature is 300 JK⁻¹ at constant pressure. The · Thermodynamics
120. Q120 — The Maxwell's relationship derived from the equation dG=VdP-SdT is · Thermodynamics
121. Q121 — The chemical potential (μi) of the ith component is defined as · Thermodynamics
122. Q122 — Work (w) involved in isothermal reversible expansion from Vi to Vf of n moles of an ideal gas is · Thermodynamics
123. Q123 — The boiling point of a solution of non-volatile solid is higher than that of the pure solvent. It always · Thermodynamics

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