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

1. Q1 — Among the compounds A-D, those which hydrolyse easily are · Chemical Bonding
2. Q2 — The number of lone-pairs are identical in the pairs · Chemical Bonding
3. Q3 — Flame proof fabrices contain · Main Group Elements
4. Q4 — The IUPAC name for the compound given below is · General Organic Chemistry
5. Q5 — In the compound given below, the hydrogens marked A and B are · General Organic Chemistry
6. Q6 — Among the following compounds, the one which has highest dipole moment is · General Organic Chemistry
7. Q7 — The most stable conformations of 1, 2-difluoroethane and dl-2, 3-butanediol are · General Organic Chemistry
8. Q8 — Match the following drugs with their medicinal activity · Natural Products
9. Q9 — The biosynthetic precursor for the steroids is · Natural Products
10. Q10 — Number of isoprene units present in lupeol is · Natural Products
11. Q11 — In the UV-visible is spectrum, a diterpenoid exhibited λmax at 275 nm. The compound, among the choices given · Natural Products
12. Q12 — α-Pinene on reaction with dilute alkaline KMnO₄ produces a diol, which on further oxidation with chromium · Natural Products
13. Q13 — The major product formed in the reaction of guanosine with one equivalent of methyl iodide is · Natural Products
14. Q14 — Reaction of the dipeptide, given below, with hydrogen in the presence of 10% palladium over carbon, produces · Natural Products
15. Q15 — In the UV-visible is spectrum, a diterpenoid exhibited a λmax =275 nm. The compound, among the choices given · Organic Spectroscopy
16. Q16 — In the broad band decoupled ¹³C NMR spectrum, the number of signals appearing for the two pyrene diols A and · Organic Spectroscopy
17. Q17 — An organic compound exhibited the following ¹H NMR spectra data: δ: 7.80(2H, d, J=8 Hz), 6.80(2H, d, J=8 Hz) · Organic Spectroscopy
18. Q18 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
19. Q19 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
20. Q20 — The major product formed in the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
21. Q21 — What is the atomic term symbol for helium atom with electronic configuration 1 s² ? · Atomic and Molecular Term Symbol
22. Q22 — Identify the Mulliken notation for the following irreducible representation · Group Theory
23. Q23 — The aggregation of surfactant molecules is known as · Surface Chemistry
24. Q24 — "Colloids are thermodynamically unstable with reference to bulk but kinetically stable". Identify the correct · Surface Chemistry
25. Q25 — The compound that will behave as an acid in H₂ SO₄ is · Acids and Bases
26. Q26 — The coordination geometry of copper (II) in the type I copper protein plastocyanin is: · Bioinorganic Chemistry
27. Q27 — The metal ions present in the active site of nitrogenase enzyme co-factor are · Bioinorganic Chemistry
28. Q28 — For the metalloprotein hemerythrin, the statement that NOT TRUE is · Bioinorganic Chemistry
29. Q29 — The number of lone-pairs are identical in the pairs · Chemical Bonding
30. Q30 — Among the following, an example of a hypervalent species is · Chemical Bonding
31. Q31 — The molecule in which the bond order increases upon addition of an electron · Chemical Bonding
32. Q32 — The energy of 2s and 2p orbitals is the same for · Chemical Bonding
33. Q33 — If a homonuclear diatomic molecule is oriented along the Z-axis, the molecular orbital formed by linear · Chemical Bonding
34. Q34 — According to VSEPR theory, the geometry (with lone pair) around the central iodine in I₃⁺and I₃⁻ ions · Chemical Bonding
35. Q35 — The electronic transition responsible for the colour of the transition metal ions is · Coordination Chemistry
36. Q36 — The Mulliken symbols for the spectroscopic states arising from the free-ion term F are · Coordination Chemistry
37. Q37 — Which of the pairs will generally result in tetrahedral coordination complexes, when ligands are Cl⁻ or OH⁻ · Coordination Chemistry
38. Q38 — Silica gel contains [Co (Cl₄)]²⁻ as an indicator. When activated, silica gel becomes dark blue while upon · Coordination Chemistry
39. Q39 — Intense band at 15000 cm⁻¹ in the UV-visible spectrum of [Bu₄N]₂Re₂Cl₈ is due to the Transition · Coordination Chemistry
40. Q40 — Identify the order representing increasing π-acidity of the following ligands C₂ F₄, NEt₃, CO and C₂ H₄ · Coordination Chemistry
41. Q41 — The species with highest magnetic moment (spin only value) is · Coordination Chemistry
42. Q42 — Three bands in the electronic spectrum of [Cr (NH₃)₆]³⁺ are due to the following transitions (A) ⁴A2g→⁴T1g · Coordination Chemistry
43. Q43 — The Δt of the following complexes (A) [Co(Cl₄)]²⁻ (B) [Co(Br₄)]²⁻ (C) [Co(NCS)₄]²⁻ Follows the order · Coordination Chemistry
44. Q44 — The number of EPR signals observed for octahedral Ni (II) complexes is · Inorganic Spectroscopy
45. Q45 — Among the following, those can act as Mössbauer muclei are (A) ¹²⁹I (B) ⁵⁷Co (C) ⁵⁷Fe (D) ¹²¹Sb · Inorganic Spectroscopy
46. Q46 — For a tetragonally distorted Cr(III) complex, zero-field splitting results in the following number of Kramers · Inorganic Spectroscopy
47. Q47 — In the presence of an external magnetic field (normal Zeeman effect), the transition ¹ D₂ → ¹ P₁ splits into · Inorganic Spectroscopy
48. Q48 — In Mössbauer experiment, a source emitting at 14.4 KeV (3.48 × 10¹⁸ Hz) had to be moved towards absorber at · Inorganic Spectroscopy
49. Q49 — Consider following lanthanide (III) ions (A) Nd(III) (B) Gd(III) (C) Dy(III) The magnetic moment closest to · Lanthanides and Actinides
50. Q50 — The ground state term symbol for Nb (atomic number 41) is ⁶D. The electronic configuration corresponding to · Lanthanides and Actinides
51. Q51 — Which of the following pairs has the highest difference in their first ionization energy? · Main Group Elements
52. Q52 — Which of the following is used as propellant for whipping creams? · Main Group Elements
53. Q53 — Among the oxides of nitrogen, N₂ O₃, N₂ O₄, and N₂ O₅ the compound(s) having N-N bond is/are · Main Group Elements
54. Q54 — Identify the pairs in which the covalent radii of elements are almost similar (A) Nb, Ta (B) Mo, W (C) La, Lu · Main Group Elements
55. Q55 — The correct equilibrium order for the interconversion of different forms of SiO₂ is · Main Group Elements
56. Q56 — For neutron activation analysis of an element, the favourable characteristics of both the target and the · Nuclear Chemistry
57. Q57 — In 'carbon-dating' application of radioisotopes, ¹⁴C emits · Nuclear Chemistry
58. Q58 — For the nuclear reactions. (A) ₄⁸Be → 2 ₂⁴He (B) ₃₆⁸⁰Kr → 2 ₁₈⁴⁰Ar (Given masses: ⁸Be = 8.005300, ⁴He = · Nuclear Chemistry
59. Q59 — The oxidation state of molybdenum in [ (η⁷ -tropylium) Mo(CO)₃]⁺is: · Organometallic Compounds
60. Q60 — The reaction, [(CO)₅ Mn(Me)]+CO → [(CO)₅ Mn{C(O) Me}] is an example for · Organometallic Compounds
61. Q61 — The orders of reactivity of ligands, NMe3 PMe3, and CO with complexes MeTiCl, and (CO)₅ Mo (thf) are · Organometallic Compounds
62. Q62 — The number of metal-metal bonds in [W₂(OPh)₆] is: · Organometallic Compounds
63. Q63 — The number of metal-metal bonds in Ir₄(CO)₁₂ is · Organometallic Compounds
64. Q64 — In the IR spectrum, the absorption band due to carbonyl group in phenyl acetate appears at · Organic Spectroscopy
65. Q65 — In the UV-visible is spectrum, a diterpenoid exhibited λmax =275 nm. The compound, among the choices given · Organic Spectroscopy
66. Q66 — In the broad band decoupled ¹³ C NMR spectrum, the number of signals appearing for the two pyrene diols A and · Organic Spectroscopy
67. Q67 — Among the following dienes, the one that undergoes a degenerate Cope rearrangement is · Pericyclic Reactions
68. Q68 — The most appropriate mode of cyclisation in the following transformation is · Pericyclic Reactions
69. Q69 — The following photochemical conversion proceeds through · Photochemical Reactions
70. Q70 — A radioisotope ⁴¹ Ar initially decays at the rate of 34, 500 disintegrations/minute, but decay rate falls to · Chemical Kinetics
71. Q71 — Observe the following statements (I) In the H₂-O₂ reaction, explosion occurs when the rate of chain branching · Chemical Kinetics
72. Q72 — 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
73. Q73 — A bacterial colony grows most commonly by cell division. The change in the population due to cell division in · Chemical Kinetics
74. Q74 — The rate equation for the reaction 2 AB+B₂ → 2 AB₂ is given byrate =k[AB] [B₂] A possible mechanism · Chemical Kinetics
75. Q75 — 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
76. Q76 — A chemical reaction involving nonlinear molecule + nonlinear molecule ⇋nonlinear activated complex.The number · Chemical Kinetics
77. Q77 — The correlation coefficient of two parameters is found to be -0.99. It may be concluded that the two · Data Analysis
78. Q78 — For two variables x and y, the following data set is given: The correct statement for the covariance A and · Data Analysis
79. Q79 — If the concentration (c) is increased to 4 times its original value (c), the change in molar conductivity for · Electrochemistry
80. Q80 — Which is correct Nernst equation for redox reaction O+n e ⇌ ? · Electrochemistry
81. Q81 — A molecules contains the following symmetry operations: E, 2 C₆, 2 C₃, C₂, 3 σd, 3 σv. The number of classes · Group Theory
82. Q82 — Identify the point group symmetry of the following molecule (all C-C bond lengths are equal) · Group Theory
83. Q83 — A triatomic molecule of the type AB₂ shows two IR absorption lines and one IR-Raman line. The structure of · Molecular Spectroscopy
84. Q84 — In NMR spectroscopy, the product of the nuclear 'g' factor (gN), the nuclear magneton (βN) and the magnetic · Molecular Spectroscopy
85. Q85 — An AX system gave 4 lines at 4.72, 4.6, 1.12 and 1.0 ppm away from the TMS using an nmr spectrometer · Molecular Spectroscopy
86. Q86 — The wave function ψ of a certain system is the linear combination ψ=√(1/4) ψ₁+√(3/4) ψ₂ where ψ₁ and ψ₂ are · Quantum Chemistry
87. Q87 — For the particle-in-a-box problem in (0, L) an approximate wave function is given as x(L / 2-x)(L-x). The · Quantum Chemistry
88. Q88 — The hydrogenic orbital with the form of the radial function r² (α₁-r) (α₂-r) exp [-β r] where a₁, a₂ and b · Quantum Chemistry
89. Q89 — The operator [x, [x, p²]] is identical with · Quantum Chemistry
90. Q90 — For the particle-in-a-box problem in (0, L) the value of ³ in the n → ∞ limit would be · Quantum Chemistry
91. Q91 — Identify the Huckel determinant for cyclobutadiene · Quantum Chemistry
92. Q92 — In the formation of H₂ molecules from 2H atoms placed at positions A and B, and separated by a distance rAB · Quantum Chemistry
93. Q93 — The coordinates for the atoms in a body centred cubic unit cell are · Solid State Chemistry
94. Q94 — The inter planar distance (Å) for a (100) plane in a cubic structure with the lattice parameter of 4 Å is: · Solid State Chemistry
95. Q95 — A plane of spacing 'd' shows first order Bragg diffraction at angle θ. A plane of spacing 2d · Solid State Chemistry
96. Q96 — A system has 100 degenerate energy levels and 100 bosons are kept in it. Find the entropy of the system at · Statistical Thermodynamics
97. Q97 — Calculate the total number of microstates for 6 identical particles with their occupation numbers {1, 2, and · Statistical Thermodynamics
98. Q98 — The allowed transition among the following is · Statistical Thermodynamics
99. Q99 — The aggregation of surfactant molecules is known as · Surface Chemistry
100. Q100 — "Colloids are thermodynamically unstable with reference to bulk but kinetically stable". Identify the correct · Surface Chemistry
101. Q101 — The lowest pressure at which the liquid phase of a pure substance can exist is known as · Thermodynamics
102. Q102 — A system consists of gaseous H₂, O₂, H₂ O and CO₂ where the amount of CO₂ is specified and the equilibrium · Thermodynamics
103. Q103 — Which of the following statements is true for a cyclic process? · Thermodynamics
104. Q104 — The most stable conformations of 1, 2-difluoroethane and dl-2, 3-butanediol are · Stereochemistry

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