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

1. Q1 — Match each item from the List-I (compound in solvent) with that from the List-II (its behaviour) and select · Acids and Bases
2. Q2 — The compound that will behave as an acid in H₂ SO₄ is · Acids and Bases
3. Q3 — Which ones among CO₃²⁻, SO₃, XeO₃, and NO₃⁻, have planar structure? · Chemical Bonding
4. Q4 — The recoil energy of a Mossabauer nuclide of mass 139 amu is 2.5 MeV. The energy emitted by the nucleus in · Inorganic Spectroscopy
5. Q5 — Find out the number of lines in the ³¹P NMR signal for diagram · Inorganic Spectroscopy
6. Q6 — Consider the catalyst in column-I and reaction in column-II. Column-I: A [(R)-BINAP]Ru⁻²; B [Rh(CO)₂I₂]⁻¹; C · Organometallic Compounds
7. Q7 — In hydrofomylation reaction using [Rh(PPh₃)₂(CO)(H)] as the catalyst, addition of excess PPh₃, would · Organometallic Compounds
8. Q8 — Reactions A and B are, termed as respectively. (A) + → (B) + + · Organometallic Compounds
9. Q9 — The correct order of acidity of the compounds A-C is: A B C · General Organic Chemistry
10. Q10 — The absolute configuration at the two chiral centres of (-)-camphore is: · General Organic Chemistry
11. Q11 — Given the energy of each gauche butane interaction is 0.9 kcal / mol, G value of the following reaction is · General Organic Chemistry
12. Q12 — Degradation of penicillin G gives penicillamine that can utilize nitrogen, oxygen or sulfur atoms as donors · Natural Products
13. Q13 — The biosynthetic precursor of cadinene is: Cadinene · Natural Products
14. Q14 — A tripeptide gives the following products on Edman degradation. + The tripeptide is · Natural Products
15. Q15 — Match the following · Natural Products
16. Q16 — Match the following biochemical transformations with coenzymes involved · Natural Products
17. Q17 — The osazone A could be obtained from · Natural Products
18. Q18 — In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · Organic Spectroscopy
19. Q19 — In the following sequence of pericyclic reactions X and Y are · Pericyclic Reactions
20. Q20 — In the following reaction A and B are · Reagents, Reaction Mechanisms & Named Reactions
21. Q21 — In the following reaction, the reagent A and the major product B are · Reagents, Reaction Mechanisms & Named Reactions
22. Q22 — The major product formed in the following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
23. Q23 — The major product formed in the following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
24. Q24 — The major product B formed in the following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
25. Q25 — The major product B formed in the following reaction sequence is · Reagents, Reaction Mechanisms & Named Reactions
26. Q26 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
27. Q27 — The decomposition of NH₃ on Mo surface follows Langmuir-Hinshelwood mechanism. The decomposition was carried · Chemical Kinetics
28. Q28 — A bacterial colony grows most commonly by cell division. The change in the population due to cell division in · Chemical Kinetics
29. Q29 — The rate equation for the reaction 2AB+B₂ → 2AB₂ is given by rate=k[AB][B₂] A possible mechanism consistent · Chemical Kinetics
30. Q30 — The equilibrium constant for an electrochemical reaction, 2 Fe³⁺+Sn²⁺ ⇌ 2 Fe²⁺+Sn⁴⁺ is [Eo_Fe³⁺/Fe²⁺=0.75 V · Electrochemistry
31. Q31 — The potential in Debye-Hückel theory is proportional to · Electrochemistry
32. Q32 — The rotational partition function of H₂ is : · Statistical Thermodynamics
33. Q33 — The equilibrium population ratio (nj / ni) of a doubly-degenerate energy level (Ej) lying at energy 2 units · Statistical Thermodynamics
34. Q34 — For water, Δ Hvap ≈ 41 kJ mol⁻¹. The molar entropy of vaporization at 1 atm pressure is approximately · Thermodynamics
35. Q35 — A carnot takes up 90 J of heat from the source kept at 300K. The correct statement among the following is · Thermodynamics
36. Q36 — The internal pressure (∂ U / ∂ V)T of a real gas is related to the compressibility factor Z=p V / RT by [ · Thermodynamics
37. Q37 — Match each item from the List-I (compound in solvent) with that from the List-II (its behaviour) and select · Acids and Bases
38. Q38 — The correct set of the biologically essential elements is, · Bioinorganic Chemistry
39. Q39 — Based on the behaviour of the metalloenzymes, consider the following statements (A) In the enzymes, the zinc · Bioinorganic Chemistry
40. Q40 — Fe²⁺-porphyrins fail to exhibit reversible oxygen transport and cannot differentiate CO from O₂. However, the · Bioinorganic Chemistry
41. Q41 — Which ones among CO₃²⁻, SO₃, XeO₃ and NO₃⁻, have planar structure? · Chemical Bonding
42. Q42 — When a hydrogen atom is placed in an electric field along the y-axis, the orbital that mixes most with the · Chemical Bonding
43. Q43 — In [Mo₂ (S₂)₆]²⁻, cluster the number of bridging S₂²⁻ and coordination number of Mo respectively, are · Coordination Chemistry
44. Q44 — The light pink color of [Co (H₂ O)₆]²⁺ and the deep blue color of [CoCl₄]²⁻ are due to · Coordination Chemistry
45. Q45 — The number of possible isomers of [Ru (PPh₃)₂(acac)₂](acac= acetylacetonate) is: · Coordination Chemistry
46. Q46 — The total number of Cu-O bonds present in the crystalline copper(II) acetate monohydrate is: · Coordination Chemistry
47. Q47 — The electric dipole allowed transition in a d² atomic system is · Coordination Chemistry
48. Q48 — Coordination number of " C " in Be₂ C₃ whose structure is correlated with that of CaF₂ is: · Coordination Chemistry
49. Q49 — In the solid state, the CuCl₅ ion has two types of bonds. These are · Coordination Chemistry
50. Q50 — The correct spinel structure of Co₃ O₄ is: · Coordination Chemistry
51. Q51 — The platinum complex of NH₃ and Cl⁻ ligands is an anti-tumour agent. The correct isomeric formula of the · Coordination Chemistry
52. Q52 — One of the excited states of Ti has the electric configuration [Ar] 4 s² 3 d¹ 4 p¹. The number of microstates · Coordination Chemistry
53. Q53 — The rate of exchange of OH₂ present in the coordination sphere by ¹⁸OH₂ of, (i) [Cu (OH₂)₆]²⁺ (ii) [Mn · Coordination Chemistry
54. Q54 — The number of lines exhibited by a high resolution EPR spectrum of the species, [Cu(ethylenediamine)₂]²⁺ is · Inorganic Spectroscopy
55. Q55 — The recoil energy of a Mossabauer nuclide of mass 139 amu is 2.5 MeV. The energy emitted by the nucleus in · Inorganic Spectroscopy
56. Q56 — Find out the number of lines in the ³¹ P NMR signal for diagram · Inorganic Spectroscopy
57. Q57 — Which one of the following shows the highest solubility in hot concentrated aqueous NaOH ? · Lanthanides and Actinides
58. Q58 — Consider the ions Eu(III), Gd(III), Sm(II) and Lu(III). The observed and calculated magnetic moment values · Lanthanides and Actinides
59. Q59 — For the deposition of Pb by electroplating, the best suited compound among the following is · Main Group Elements
60. Q60 — The electronegativity differences is the highest for the pair · Main Group Elements
61. Q61 — Structure of a carborane with formula, C₂ B₄ H₈, is formally derived from · Main Group Elements
62. Q62 — Boric acid is a weak acid in aqueous solution. But its acidity increases significantly in the presence of · Main Group Elements
63. Q63 — Silicates with continuous 3D frame work are · Main Group Elements
64. Q64 — The substitution of η⁵-Cp group with nitric oxide is the easiest for · Organometallic Compounds
65. Q65 — The molecule 3 Follow 18 electron rule. The two ' M ' satisfying the condition are · Organometallic Compounds
66. Q66 — Complexes of general formula, fac- [Mo(CO)₃(phosphite)₃] have the C-O stretching bands given below · Organometallic Compounds
67. Q67 — In the cluster [Co₃(CH)(CO)₉] obeying 18e rule, the number of metal-metal bonds and the bridging ligands · Organometallic Compounds
68. Q68 — Consider the catalyst in column-I and reaction in column-II 4 The best match of a catalyst of column-I with · Organometallic Compounds
69. Q69 — Consider the following reaction mechanism The steps A, B and C, respectively, are · Organometallic Compounds
70. Q70 — Which one of the following will NOT undergo oxidative addition by methyl iodide? · Organometallic Compounds
71. Q71 — Reactions A and B are, termed as respectively. · Organometallic Compounds
72. Q72 — In the ¹ H NMR spectrum recorded at 293 K, an organic compound (H₇ NO), exhibited signals at δ 7. 8(1H, s) · Organic Spectroscopy
73. Q73 — An organic compound (C₉ H₁₀ O₃) exhibited the following spectral data: IR: 3400, 1680 ~ c m⁻¹; ¹ H ~ NMR: δ · Organic Spectroscopy
74. Q74 — The following transformation involves · Pericyclic Reactions
75. Q75 — The following photochemical transformation proceeds through · Photochemical Reactions
76. Q76 — If the concept of half-life is generalized to quarter-life of a first order chemical reaction, it will be · Chemical Kinetics
77. Q77 — The activation energy for the bimolecular reaction A+BC → AB+C is E₀ in the gas phase. If the reaction is · Chemical Kinetics
78. Q78 — The decomposition of NH₃ on Mo surface follows Langmuir-Hinshelwood mechanism. The decomposition was carried · Chemical Kinetics
79. Q79 — A radioisotope ⁴¹ Ar initially decays at the rate of 34, 500 disintegrations/minute, but decay rate falls to · Chemical Kinetics
80. Q80 — Observe the following statements (I) In the H₂-O₂ reaction, explosion occurs when the rate of chain branching · Chemical Kinetics
81. Q81 — The concentrations of a species A undergoing the reaction A → P is 1.0, 0.5, 0.33, 0.25 mol dm ⁻³ at t=0,1,2 · Chemical Kinetics
82. Q82 — A 0.1 M solution of compound A shows 50% transmittance when a cell of 1 cm width is used at λ nm. Another 0.1 · Chemical Kinetics
83. Q83 — A chemical reaction involving nonlinear molecule + nonlinear molecule ⇋nonlinear activated complex.The number · Chemical Kinetics
84. Q84 — The correlation coefficient between two arbitrary variables x and y is zero, if · Data Analysis
85. Q85 — The Daniel cell is · Electrochemistry
86. Q86 — Kohlrausch's law is applicable to a dilute solution of · Electrochemistry
87. Q87 — The equilibrium constant for an electrochemical reaction, is [ left[EFe³⁺/Fe²⁺o=0.75,mathrmV · Electrochemistry
88. Q88 — The potential in Debye-Huckel theory is proportional to · Electrochemistry
89. Q89 — The molecular that has an S₆ symmetry element is · Group Theory
90. Q90 — The number of IR active vibrational modes of pyridine is: · Group Theory
91. Q91 — The absorption spectrum of O₂ shows a vibrational structure that becomes continuum at 56875 cm⁻¹. At the · Molecular Spectroscopy
92. Q92 — The vibrational frequency and anharmonicity constant of an alkali halide are 300 cm⁻¹ and 0.0025 · Molecular Spectroscopy
93. Q93 — If A and B are non-commuting Hermitian operators, all eigenvalues of the operator given by the commutator [A · Quantum Chemistry
94. Q94 — The value of commutator [x, px²] is given by · Quantum Chemistry
95. Q95 — Combining two real wave functions φ₁ and φ₂ the following functions are constructed: A=φ₁+φ₂, B=φ₁+i φ₂ · Quantum Chemistry
96. Q96 — The trial wave function of a system is expanded as ψt=c₁ φ₁+c₂ φ₂. The matrix elements of the Hamiltonian are · Quantum Chemistry
97. Q97 — One molecular orbital of a polar molecule A B has the form cA ψA+cB ψB, where ψA and ψB are normalized atomic · Quantum Chemistry
98. Q98 — Suppose, the ground stationary state of a harmonic oscillator with force constant 'k' is given by ψ₀=exp · Quantum Chemistry
99. Q99 — The energy of a harmonic oscillator in its ground state is 1 / 2 h ω′. According to the virial theorem, the · Quantum Chemistry
100. Q100 — The energy of a hydrogen atom in a state is (-hc RH)/25 (RH=R y d b e r g. constant). The degeneracy of the · Quantum Chemistry
101. Q101 — In a many-electron atom, the total orbital angular momentum (L) and spin (S) are good quantum numbers instead · Quantum Chemistry
102. Q102 — The difference in energy levels of n=2 and n=1 of a particle -in- a one dimensional box is 6 units of energy · Quantum Chemistry
103. Q103 — The angle between the two planes represented by the Miller indices (110) and (111) in a simple cubic lattice · Solid State Chemistry
104. Q104 — A metal crystallizes in fcc structure with a unit cell side of 500 pm. If the density of the crystal is 1.33 · Solid State Chemistry
105. Q105 — The packing fraction of a simple cubic lattice is close to · Solid State Chemistry
106. Q106 — Crystal A diffracts from (111) and (200) planes but not from (110) plane, while the crystal B diffracts from · Solid State Chemistry
107. Q107 — The rotational partition function of H₂ is : · Statistical Thermodynamics
108. Q108 — Calculate the total number of microstates for 6 identical particles with their occupation numbers {1, 2, and · Statistical Thermodynamics
109. Q109 — For water, Δ Hvap ≈ 41 kJ mol⁻¹. The molar entropy of vaporization at 1 atm pressure is approximately · Thermodynamics
110. Q110 — The fugacity of a gas depends on pressure and the compressibility factor Z(=p V / RT) through the relation (V · Thermodynamics
111. Q111 — The internal pressure (∂ U / ∂ V)T of a real gas is related to the compressibility factor Z=p V / RT by · Thermodynamics

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