4AB › Chemistry PYQ › CSIR-NET › June 2012

1. Q1 — In the reactions (A) and (B), n(H₂O) + Cl⁻ → [Cl(H₂O)n]⁻..... (A) (H₂O)₆ + Mg²⁺ → [Mg(H₂O)₆]²⁺...... (B) · Acids and Bases
2. Q2 — The size of the d orbitals in Si, P, S and Cl follows the order. · Chemical Bonding
3. Q3 — The strength of Pπ-dπ bonding in E-O (E = Si, P, S and Cl) follows the order · Chemical Bonding
4. Q4 — The decreasing order of dipole moment of molecules is · Chemical Bonding
5. Q5 — The metal complex that exhibits a triplet as well as doublet in its ³¹P NMR spectrum is · Inorganic Spectroscopy
6. Q6 — The IUPAC name of the compound given below is: · General Organic Chemistry
7. Q7 — Epoxidation of (R)-cyclohex-2-enol with peracetic acid yields a 95:5 mixture of compounds A and B. Compounds · General Organic Chemistry
8. Q8 — Among the following, the amino acid which is basic in nature is: · Natural Products
9. Q9 — Match the following · Organic Spectroscopy
10. Q10 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
11. Q11 — The structure of the tricyclic compound formed in the following two step sequence is · Reagents, Reaction Mechanisms & Named Reactions
12. Q12 — For the following two reactions A and B, the correct statement is: · Reagents, Reaction Mechanisms & Named Reactions
13. Q13 — The major compound B formed in the reaction sequence given below exhibited a carbonyl absorption band at 1770 · Reagents, Reaction Mechanisms & Named Reactions
14. Q14 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
15. Q15 — The major products A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
16. Q16 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
17. Q17 — The molar conductivities at infinite dilution Λmo for Na₂ SO₄, K₂ SO₄, KCl, HCl and HCOONa at 300 K are · Electrochemistry
18. Q18 — The correct value of E°, of a half cell in the following graph of E vs log m (molality) is: · Electrochemistry
19. Q19 — The relative population in two states with energies E₁ and E₂ satisfying Boltzmann distribution is given by · Statistical Thermodynamics
20. Q20 — The energy levels of the harmonic oscillator (neglecting zero point energy) are ε(n)= nhv and n=0,1,2, … · Statistical Thermodynamics
21. Q21 — The correct entropy for 6 identical particles with their occupation number 0,1,2,3 in four steps is : · Statistical Thermodynamics
22. Q22 — The vapour of a pure substance, when cooled under a pressure less than its triple-piont pressure, · Thermodynamics
23. Q23 — In the reactions (A) and (B), n(H₂O) + Cl⁻ → [Cl(H₂O)n]⁻ (A) (H₂O)₆ + Mg²⁺ → [Mg(H₂O)₆]²⁺ (B) Water behaves as · Acids and Bases
24. Q24 — In the following reactions carried out in liquid NH₃ Zn (NH₂)₂+2 KNH₂ → K₂ [Zn (NH₂)₄] K₂ [Zn (NH₂)₄]+2 NH₄ · Acids and Bases
25. Q25 — The spectrophotometric response for the titration of a mixture of Fe³⁺ and Cu²⁺ ions against EDTA is given · Analytical Chemistry
26. Q26 — The oxidation state of iron in met-hemoglobin is · Bioinorganic Chemistry
27. Q27 — The changes (from A-D given below) which occur when O₂ binds to hemerythrin are (A) One iron atoms is · Bioinorganic Chemistry
28. Q28 — In the photosynthetic systems the redox metalloproteins involved in electron transfer are cytochrome (cyt · Bioinorganic Chemistry
29. Q29 — The size of the d orbitals in Si, P, S and Cl follows the order. · Chemical Bonding
30. Q30 — The decreasing order of dipole moment of molecules is · Chemical Bonding
31. Q31 — The nucleophilic attack on olefins under mild conditions: · Coordination Chemistry
32. Q32 — The number of spin-allowed ligand field transitions for octahedral Ni (II) complexes with ³A2g, ground state · Coordination Chemistry
33. Q33 — The number of microstates for d⁵ electron configuration is: · Coordination Chemistry
34. Q34 — The set of allowed electronic transitions among the following is: (A) ⁴Σ → ²Π (B) ³Σ → ³Π (C) ¹Δ → ¹Δ (D) ²Π · Coordination Chemistry
35. Q35 — If Mössbauer spectrum of Fe(CO)₅ is recorded in the presence of a magnetic field, the original spectrum with · Inorganic Spectroscopy
36. Q36 — The total numbers of fine and hyperfine EPR lines expected for octahedral high-spin Mn(II) complexes are · Inorganic Spectroscopy
37. Q37 — The Mossbauer spectra of two iron complexes are shown below. They may arise from (i) highspin iron(III), (ii) · Inorganic Spectroscopy
38. Q38 — The least basic among the following is: · Lanthanides and Actinides
39. Q39 — The pair of lanthanides with the highest third-ionization energy is: · Lanthanides and Actinides
40. Q40 — The lanthanide(III) ion having the highest partition coefficient between tri-n-butylphosphate and · Lanthanides and Actinides
41. Q41 — Among the halides, NCl₃(A), PCl₃(B) and AsCl₃(C), those which produce two different acids. · Main Group Elements
42. Q42 — The most used acid catalyst in oil industry and the relevant process are respectively · Main Group Elements
43. Q43 — The correct structure of P₄S₃ is: · Main Group Elements
44. Q44 — Low oxidation state complexes are often air-sensitive, but are rarely water sensitive because · Main Group Elements
45. Q45 — In 'carbon-dating' application of radioisotopes, ¹⁴C emits · Nuclear Chemistry
46. Q46 — The reactions of Ni(CO)₄ with the ligand (L=PMe₃. or.P(OMe)₃) L yields Ni(CO)₃ L. The reaction is · Organometallic Compounds
47. Q47 — Among the following the strongest oxidizing agent is: · Organometallic Compounds
48. Q48 — For the reaction, trans- [IrCl(CO) (PPh₃)₂]+Cl₂ → trans - [IrCl₃(CO) (PPh₃)₂] the correct observation · Organometallic Compounds
49. Q49 — The carbonyl resonance in ¹³C NMR spectrum of [(η⁵-C₅H₅)Rh(CO)]₃ (¹⁰³Rh, nuclear spin, I = 1/2, 100%) shows a · Organometallic Compounds
50. Q50 — The cluster having arachno type structure is: · Organometallic Compounds
51. Q51 — The final product of the reaction [Mn(CO)₆]⁺ + MeLi → is: · Organometallic Compounds
52. Q52 — The reaction 3 [Rh₄(CO)₁₂] → 2 [Rh₆(CO)₁₆]+4 CO [25° C, 500 atm CO] is: · Organometallic Compounds
53. Q53 — The complex that DOES NOT obey 18 - electron rule is: · Organometallic Compounds
54. Q54 — The number of signals that appear in the broadband decoupled ¹³ C NMR spectrum of phenanthrene and · Organic Spectroscopy
55. Q55 — In the 400 MHz, ¹ H NMR spectrum of organic compound exhibited a doublet. The two lines of the doublet are at · Organic Spectroscopy
56. Q56 — Compounds A and B exhibit two singlets, each in theirH NMR spectra. The expected chemical shifts are at δ · Organic Spectroscopy
57. Q57 — The major product formed in the following concerted reaction is · Pericyclic Reactions
58. Q58 — The two step conversion of 7-dehydrocholesterol to vitamin D₃ proceeds through → · Pericyclic Reactions
59. Q59 — Structure of the starting material A in the following photochemical Norrish reaction, is · Photochemical Reactions
60. Q60 — For a reaction, the rate constant k at 27° C was found to be k=5.4 × 10¹¹ e⁻⁵⁰. The activation energy of the · Chemical Kinetics
61. Q61 — The rate law for one of the mechanism of the pyrolysis of CH₃ CHO at 520° C and 0.2 bar is Rate =- |k₂ · Chemical Kinetics
62. Q62 — In the Michaelis-Menten mechanism for enzyme kinetics, the expression obtained is: v/([E]₀[S])=1.4 × · Chemical Kinetics
63. Q63 — One of the assumptions made in the conventional activated complex theory is: · Chemical Kinetics
64. Q64 — The quantitative determination of N₂ H₄ with KIO₃ proceeds in a mixture of H₂ O / CCl₄ as Follows N₂ · Chemical Kinetics
65. Q65 — "Phosphorescence" is represented as · Chemical Kinetics
66. Q66 — Using cuvettes of 0.5 cm path length, a 10⁻⁴ M solution of a chromophore shows 50% transmittance at certain · Chemical Kinetics
67. Q67 — The data obtained from two sets of experiments A and B have the following characteristics It may be concluded · Data Analysis
68. Q68 — Two data sets involving the same variables X and Y are given below If the slopes and intercepts of the · Data Analysis
69. Q69 — The molar conductivities at infinite dilution Λm⁰ for Na₂ SO₄, K₂ SO₄, KCl, HCl and HCOONa at 300 K are 260 · Electrochemistry
70. Q70 — The correct Nernst equation for the concentration cell: Pt |H₂(p) | HCl (a ±)₁|AgCl(s)| Ag | Ag|AgCl(s)| HCl · Electrochemistry
71. Q71 — Among the following, the CORRECT statement is: · Group Theory
72. Q72 — A square pyramidal, MX₄, molecule belongs to C4v point group. The symmetry operations are: E, 2C₄, C₂, 2σv · Group Theory
73. Q73 — Character table of C2 V point group is: If the initial and final states belong to A₁ and B₁ irreducible · Group Theory
74. Q74 — For a diatomic molecule AB, the energy for the rotational transition from J=0 to J=1 state is 3.9 cm⁻¹. The · Molecular Spectroscopy
75. Q75 — For the vibrational Raman spectrum of a homonuclear diatomic molecule, the selection rule under harmonic · Molecular Spectroscopy
76. Q76 — The following data were obtained from the vibrational fine structure in the vibronic spectrum of a diatomic · Molecular Spectroscopy
77. Q77 — A polymer sample has the following composition. The polydispersity index (P.D.I) of the polymer is · Polymer Chemistry
78. Q78 — During the addition polymerization, the reaction proceeds via · Polymer Chemistry
79. Q79 — The number-average molar mass (MN) and weight-average molar mass (Mw) of a polymer are obtained respectively · Polymer Chemistry
80. Q80 — For any operator A and its adjoint A, the INCORRECT statement is: · Quantum Chemistry
81. Q81 — For hydrogen-like atom with a nuclear charge Z, the energy of orbital with principal quantum number 'n' · Quantum Chemistry
82. Q82 — The average value of the radius <r> in the 1 s state of the hydrogen atom is (a₀ is Bohr radius) · Quantum Chemistry
83. Q83 — The probability of finding the particle in a one dimensional box of length 'L' in the region between L/4 and · Quantum Chemistry
84. Q84 — A particle in three dimensional cubic box of length L has energy of (14 h²)/(8 mL²). The degeneracy of the · Quantum Chemistry
85. Q85 — The following are the three statements about perturbation theory (A) Second order perturbation correction to · Quantum Chemistry
86. Q86 — Using Huckel molecular orbital approximation, the two roots of secular equation of ethane are · Quantum Chemistry
87. Q87 — For H₂ molecule in the excited state σg¹ σu¹ spin part of the triplet state with ms=0 is proportional to · Quantum Chemistry
88. Q88 — How many atoms are there in an element packed in a fcc structure · Solid State Chemistry
89. Q89 — The structure obtained when all the tetrahedral holes are occupied in a fee structure is of the type · Solid State Chemistry
90. Q90 — The lattice parameter of an element stabilized in a fcc structure is 4.04 Å. The atomic radius of the element · Solid State Chemistry
91. Q91 — The wavelength and the spectral region for a single electron transfer across the band gap in a semi-conductor · Solid State Chemistry
92. Q92 — The electric-dipole allowed transition among the following is · Statistical Thermodynamics
93. Q93 — The term symbol for the first excited state of Be with the electronic configuration 1 s² 2 s¹ 3 s¹ is · Statistical Thermodynamics
94. Q94 — Dispersion of a solid in a liquid, a liquid in a gas and a liquid in a liquid are respectively known as · Surface Chemistry
95. Q95 — A dilute silver nitrate solution is added to a slight excess iodide solution. A solution of AgI is formed · Surface Chemistry
96. Q96 — The adsorption of a gas is described by the Langmuir isotherm with the equilibrium constant K =0.9 kPa⁻¹ at · Surface Chemistry
97. Q97 — The vapour of a pure substance, when cooled under a pressure less than its triple-point pressure, · Thermodynamics
98. Q98 — The quantities, which are held fixed in a canonical ensemble are · Thermodynamics
99. Q99 — An ideal gas was subjected to a reversible, adiabatic, expansion and then its initial volume was restored by · Thermodynamics

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