4AB › Chemistry PYQ › CSIR NET › June 2013

1. Q2 — The number of lone-pairs are identical in the pairs · Chemical Bonding
2. Q4 — The IUPAC name for the compound given below is · General Organic Chemistry
3. Q5 — In the compound given below, the hydrogens marked A and B are · General Organic Chemistry
4. Q6 — Among the following compounds, the one which has highest dipole moment is · General Organic Chemistry
5. Q8 — Match the following drugs with their medicinal activity · Natural Products
6. Q9 — The biosynthetic precursor for the steroids is · Natural Products
7. Q10 — Number of isoprene units present in lupeol is · Natural Products
8. Q12 — α-Pinene on reaction with dilute alkaline KMnO₄ produces a diol, which on further oxidation with chromium · Natural Products
9. Q13 — The major product formed in the reaction of guanosine with one equivalent of methyl iodide is · Natural Products
10. Q14 — Reaction of the dipeptide, given below, with hydrogen in the presence of 10% palladium over carbon, produces · Natural Products
11. Q15 — In the UV-visible is spectrum, a diterpenoid exhibited a λmax =275 nm. The compound, among the choices given · Organic Spectroscopy
12. Q16 — In the broad band decoupled ¹³C NMR spectrum, the number of signals appearing for the two pyrene diols A and · Organic Spectroscopy
13. 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
14. Q18 — The major product formed in the following reaction is: 1. CH₃CO₃H · Reagents, Reaction Mechanisms & Named Reactions
15. Q20 — The major product formed in the following reaction is: 1. NaH, CS₂, MeI · Reagents, Reaction Mechanisms & Named Reactions
16. Q21 — What is the atomic term symbol for helium atom with electronic configuration 1s²? · Atomic and Molecular Term Symbol
17. Q22 — Identify the Mulliken notation for the following irreducible representation · Group Theory
18. Q23 — The aggregation of surfactant molecules is known as · Surface Chemistry
19. Q24 — "Colloids are thermodynamically unstable with reference to bulk but kinetically stable". Identify the correct · Surface Chemistry
20. Q25 — The compound that will behave as an acid in H₂ SO₄ is · Acids and Bases
21. Q26 — The coordination geometry of copper (II) in the type I copper protein plastocyanin is: · Bioinorganic Chemistry
22. Q27 — The metal ions present in the active site of nitrogenase enzyme co-factor are · Bioinorganic Chemistry
23. Q28 — For the metalloprotein hemerythrin, the statement that NOT TRUE is · Bioinorganic Chemistry
24. Q29 — The number of lone-pairs are identical in the pairs · Chemical Bonding
25. Q31 — The molecule in which the bond order increases upon addition of an electron · Chemical Bonding
26. Q32 — The energy of 2s and 2p orbitals is the same for · Chemical Bonding
27. Q33 — If a homonuclear diatomic molecule is oriented along the Z-axis, the molecular orbital formed by linear · Chemical Bonding
28. Q34 — According to VSEPR theory, the geometry (with lone pair) around the central iodine in I₃⁺and I₃⁻ ions · Chemical Bonding
29. Q35 — The electronic transition responsible for the colour of the transition metal ions is · Coordination Chemistry
30. Q36 — The Mulliken symbols for the spectroscopic states arising from the free-ion term F are · Coordination Chemistry
31. Q37 — Which of the pairs will generally result in tetrahedral coordination complexes, when ligands are Cl⁻ or OH⁻ · Coordination Chemistry
32. Q38 — Silica gel contains [Co (Cl₄)]²⁻ as an indicator. When activated, silica gel becomes dark blue while upon · Coordination Chemistry
33. Q39 — Intense band at 15000 cm⁻¹ in the UV-visible spectrum of [Bu₄N]₂Re₂Cl₈ is due to the Transition · Coordination Chemistry
34. Q40 — Identify the order representing increasing π-acidity of the following ligands C₂F₄, NEt₃, CO and C₂H₄ · Coordination Chemistry
35. Q41 — The species with highest magnetic moment (spin only value) is · Coordination Chemistry
36. Q42 — Three bands in the electronic spectrum of [Cr (NH₃)₆]³⁺ are due to the following transitions (A) ⁴A2g→⁴T1g · Coordination Chemistry
37. 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
38. Q45 — Among the following, those can act as Mössbauer muclei are (A) ¹²⁹I (B) ⁵⁷Co (C) ⁵⁷Fe (D) ¹²¹Sb · Inorganic Spectroscopy
39. Q46 — For a tetragonally distorted Cr(III) complex, zero-field splitting results in the following number of Kramers · Inorganic Spectroscopy
40. Q48 — In Mössbauer experiment, a source emitting at 14.4 KeV (3.48 × 10¹⁸ Hz) had to be moved towards absorber at · Inorganic Spectroscopy
41. Q49 — Consider following lanthanide (III) ions (A) Nd(III) (B) Gd(III) (C) Dy(III) The magnetic moment closest to · Lanthanides and Actinides
42. Q50 — The ground state term symbol for Nb (atomic number 41) is ⁶D. The electronic configuration corresponding to · Lanthanides and Actinides
43. Q51 — Which of the following pairs has the highest difference in their first ionization energy? · Main Group Elements
44. Q52 — Which of the following is used as propellant for whipping creams? · Main Group Elements
45. 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
46. 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
47. Q55 — The correct equilibrium order for the interconversion of different forms of SiO₂ is · Main Group Elements
48. Q57 — In 'carbon-dating' application of radioisotopes, ¹⁴C emits · Nuclear Chemistry
49. Q58 — For the nuclear reactions. (A) ₄⁸Be → 2 ₂⁴He (B) ₃₆⁸⁰Kr → 2 ₁₈⁴⁰Ar (Given masses: ⁸Be = 8.005300, ⁴He = · Nuclear Chemistry
50. Q59 — The oxidation state of molybdenum in [ (η⁷ -tropylium) Mo(CO)₃]⁺is: · Organometallic Compounds
51. Q60 — The reaction, [(CO)₅ Mn(Me)]+CO → [(CO)₅ Mn{C(O) Me}] is an example for · Organometallic Compounds
52. Q61 — The orders of reactivity of ligands, NMe3 PMe3, and CO with complexes MeTiCl, and (CO)₅ Mo (thf) are · Organometallic Compounds
53. Q62 — The number of metal-metal bonds in [W₂(OPh)₆] is: · Organometallic Compounds
54. Q63 — The number of metal-metal bonds in Ir₄(CO)₁₂ is · Organometallic Compounds
55. Q64 — In the IR spectrum, the absorption band due to carbonyl group in phenyl acetate appears at · Organic Spectroscopy
56. Q65 — In the UV-visible is spectrum, a diterpenoid exhibited λmax =275 nm. The compound, among the choices given · Organic Spectroscopy
57. Q66 — In the broad band decoupled ¹³C NMR spectrum, the number of signals appearing for the two pyrene diols A and · Organic Spectroscopy
58. Q69 — The following photochemical conversion proceeds through · Photochemical Reactions
59. Q70 — A radioisotope ₄₁Ar initially decays at the rate of 34,500 disintegrations/minute, but decay rate falls to · Chemical Kinetics
60. 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 · Chemical Kinetics
61. Q74 — The rate equation for the reaction 2 AB+B₂ → 2 AB₂ is given byrate =k[AB] [B₂] A possible mechanism · Chemical Kinetics
62. 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
63. Q76 — A chemical reaction involving nonlinear molecule + nonlinear molecule ⇌ nonlinear activated complex. The · Chemical Kinetics
64. Q77 — The correlation coefficient of two parameters is found to be –0.99. It may be concluded that the two · Data Analysis
65. Q78 — For two variables x and y, the following data set is given: The correct statement for the covariance A and · Data Analysis
66. Q79 — If the concentration (c) is increased to 4 times its original value (c), the change in molar conductivity for · Electrochemistry
67. Q81 — A molecules contains the following symmetry operations: E, 2C₆, 2C₃, C₂, 3σd, 3σv. The number of classes and · Group Theory
68. Q82 — Identify the point group symmetry of the following molecule (all C-C bond lengths are equal) · Group Theory
69. Q84 — In NMR spectroscopy, the product of the nuclear 'g' factor (gN), the nuclear magneton (βN) and the magnetic · Molecular Spectroscopy
70. 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
71. 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
72. 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
73. 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
74. Q89 — The operator [x, [x, p²]] is identical with · Quantum Chemistry
75. Q91 — Identify the Huckel determinant for cyclobutadiene · Quantum Chemistry
76. Q93 — The coordinates for the atoms in a body centred cubic unit cell are · Solid State Chemistry
77. 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
78. Q95 — A plane of spacing 'd' shows first order Bragg diffraction at angle θ. A plane of spacing 2d · Solid State Chemistry
79. Q96 — A system has 100 degenerate energy levels and 100 bosons are kept in it. Find the entropy of the system at · Statistical Thermodynamics
80. Q97 — Calculate the total number of microstates for 6 identical particles with their occupation numbers {1, 2, and · Statistical Thermodynamics
81. Q98 — The allowed transition among the following is · Statistical Thermodynamics
82. Q99 — The aggregation of surfactant molecules is known as · Surface Chemistry
83. Q100 — "Colloids are thermodynamically unstable with reference to bulk but kinetically stable". Identify the correct · Surface Chemistry
84. Q101 — The lowest pressure at which the liquid phase of a pure substance can exist is known as · Thermodynamics
85. Q103 — Which of the following statements is true for a cyclic process? · Thermodynamics
86. Q106 — Flame proof fabrices contain · Main Group Elements

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