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Chemistry PYQ

CSIR NET Chemistry June 2012 — 78 questions

Chemical Sciences, June 2012: every question we hold for this paper, with options, the answer where the source gives one, and an explanation where available.

  1. Q1 — In the reactions (A) and (B), n(H₂O)+Cl⁻→[Cl(H₂O)n]⁻ (H₂O)₆+Mg⁺²→[Mg(H₂O)₆]⁺² (A) (B) water behaves as · Acid 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: 1. CF₃CO₃H 2. H₃O⁺ · Reagents, Reaction Mechanisms & Named Reactions
  11. Q14 — The major product formed in the following reaction is: 1. DIBAL (1 eq.) 2. CH₂=CHMgBr 3. PCC · Reagents, Reaction Mechanisms & Named Reactions
  12. Q15 — The major products A and B in the following reaction sequence are AIBN, Δ B · Reagents, Reaction Mechanisms & Named Reactions
  13. Q17 — The molar conductivities at infinite dilution Λmo for Na₂ SO₄, K₂ SO₄, KCl, HCl and HCOONa at 300 K are · Electrochemistry
  14. Q18 — The correct value of E°, of a half cell in the following graph of E vs log m (molality) is: log m · Electrochemistry
  15. Q19 — The relative population in two states with energies E₁ and E₂ satisfying Boltzmann distribution is given by · Statistical Thermodynamics
  16. Q20 — The energy levels of the harmonic oscillator (neglecting zero point energy) are ε(n)= nhv and n=0,1,2, … · Statistical Thermodynamics
  17. Q21 — The correct entropy for 6 identical particles with their occupation number 0,1,2,3 in four steps is : · Statistical Thermodynamics
  18. Q22 — The vapour of a pure substance, when cooled under a pressure less than its triple-piont pressure, · Thermodynamics
  19. 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
  20. 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 · Acid and Bases
  21. Q26 — The oxidation state of iron in met-hemoglobin is · Bioinorganic Chemistry
  22. Q27 — The changes (from A-D given below) which occur when O₂ binds to hemerythrin are (A) One iron atoms is · Bioinorganic Chemistry
  23. Q28 — In the photosynthetic systems the redox metalloproteins involved in electron transfer are cytochrome (cyt · Bioinorganic Chemistry
  24. Q29 — The size of the d orbitals in Si, P, S and Cl follows the order. · Chemical Bonding
  25. Q30 — The decreasing order of dipole moment of molecules is · Chemical Bonding
  26. Q31 — The nucleophilic attack on olefins under mild conditions: · Coordination Chemistry
  27. Q32 — The number of spin-allowed ligand field transitions for octahedral Ni (II) complexes with ³A2g, ground state · Coordination Chemistry
  28. Q33 — The number of microstates for d⁵ electron configuration is: · Coordination Chemistry
  29. Q34 — The set of allowed electronic transitions among the following is: (A) ⁴Σ → ²Π (B) ³Σ → ³Π (C) ¹Δ → ¹Δ (D) ²Π · Coordination Chemistry
  30. Q36 — The total numbers of fine and hyperfine EPR lines expected for octahedral high-spin Mn(II) complexes are · Inorganic Spectroscopy
  31. Q38 — The least basic among the following is: · Lanthanides and Actinides
  32. Q39 — The pair of lanthanides with the highest third-ionization energy is: · Lanthanides and Actinides
  33. Q40 — The lanthanide(III) ion having the highest partition coefficient between tri-n-butylphosphate and · Lanthanides and Actinides
  34. Q41 — Among the halides, NCl₃(A), PCl₃(B) and AsCl₃(C), those which produce two different acids. · Main Group Elements
  35. Q42 — The most used acid catalyst in oil industry and the relevant process are respectively · Main Group Elements
  36. Q43 — The correct structure of P₄S₃ is: · Main Group Elements
  37. Q44 — Low oxidation state complexes are often air-sensitive, but are rarely water sensitive because · Main Group Elements
  38. Q45 — In 'carbon-dating' application of radioisotopes, ¹⁴C emits · Nuclear Chemistry
  39. 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
  40. Q47 — Among the following the strongest oxidizing agent is: · Organometallic Compounds
  41. Q48 — For the reaction, trans- [IrCl(CO) (PPh₃)₂]+Cl₂ → trans - [IrCl₃(CO) (PPh₃)₂] the correct observation · Organometallic Compounds
  42. Q50 — The cluster having arachno type structure is: · Organometallic Compounds
  43. Q51 — The final product of the reaction [Mn(CO)₆]⁺ + MeLi → is: · Organometallic Compounds
  44. Q54 — The number of signals that appear in the broadband decoupled ¹³C NMR spectrum of phenanthrene and anthracene · Organic Spectroscopy
  45. Q55 — In the 400 MHz, ¹H NMR spectrum of organic compound exhibited a doublet. The two lines of the doublet are at · Organic Spectroscopy
  46. Q58 — The two step conversion of 7-dehydrocholesterol to vitamin D₃ proceeds through · Pericyclic Reactions
  47. 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
  48. Q62 — In the Michaelis-Menten mechanism for enzyme kinetics, the expression obtained is: v/([E]₀[S])=1.4 × · Chemical Kinetics
  49. Q63 — One of the assumptions made in the conventional activated complex theory is: · Chemical Kinetics
  50. Q65 — "Phosphorescence" is represented as · Chemical Kinetics
  51. Q66 — Using cuvettes of 0.5 cm path length, a 10⁻⁴ M solution of a chromophore shows 50% transmittance at certain · Chemical Kinetics
  52. Q68 — Two data sets involving the same variables X and Y are given below If the slopes and intercepts of the · Data Analysis
  53. Q71 — Among the following, the CORRECT statement is: · Group Theory
  54. Q72 — A square pyramidal, MX₄, molecule belongs to C4v point group. The symmetry operations are: E, 2C₄, C₂, 2σv · Group Theory
  55. Q73 — Character table of C2v point group is: If the initial and final states belong to A₁ and B₁ irreducible · Group Theory
  56. Q74 — For a diatomic molecule AB, the energy for the rotational transition from J = 0 to J = 1 state is 3.9 cm⁻¹ · Molecular Spectroscopy
  57. Q75 — For the vibrational Raman spectrum of a homonuclear diatomic molecule, the selection rule under harmonic · Molecular Spectroscopy
  58. Q76 — The following data were obtained from the vibrational fine structure in the vibronic spectrum of a diatomic · Molecular Spectroscopy
  59. Q77 — A polymer sample has the following composition. The polydispersity index (P.D.I) of the polymer is · Polymer Chemistry
  60. Q78 — During the addition polymerization, the reaction proceeds via · Polymer Chemistry
  61. Q79 — The number-average molar mass (MN) and weight-average molar mass (Mw) of a polymer are obtained respectively · Polymer Chemistry
  62. Q80 — For any operator A and its adjoint A, the INCORRECT statement is: · Quantum Chemistry
  63. Q81 — For hydrogen-like atom with a nuclear charge Z, the energy of orbital with principal quantum number 'n' · Quantum Chemistry
  64. Q82 — The average value of the radius r in the 1s state of the hydrogen atom is (a₀ is Bohr radius) · Quantum Chemistry
  65. Q83 — The probability of finding the particle in a one dimensional box of length 'L' in the region between L/4 and · Quantum Chemistry
  66. Q84 — A particle in three dimensional cubic box of length L has energy of (14h²)/(8mL²). The degeneracy of the · Quantum Chemistry
  67. Q85 — The following are the three statements about perturbation theory (A) Second order perturbation correction to · Quantum Chemistry
  68. Q87 — For H₂ molecule in the excited state σg¹σu¹ spin part of the triplet state with mS = 0 is proportional to · Quantum Chemistry
  69. Q88 — How many atoms are there in an element packed in a fcc structure · Solid State Chemistry
  70. 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
  71. Q91 — The wavelength and the spectral region for a single electron transfer across the band gap in a semi-conductor · Solid State Chemistry
  72. Q92 — The electric-dipole allowed transition among the following is · Statistical Thermodynamics
  73. 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
  74. Q95 — A dilute silver nitrate solution is added to a slight excess iodide solution. A solution of AgI is formed · Surface Chemistry
  75. Q96 — The adsorption of a gas is described by the Langmuir isotherm with the equilibrium constant K = 0.9 kPa⁻¹ at · Surface Chemistry
  76. Q97 — The vapour of a pure substance, when cooled under a pressure less than its triple-point pressure, · Thermodynamics
  77. Q98 — The quantities, which are held fixed in a canonical ensemble are · Thermodynamics
  78. Q99 — An ideal gas was subjected to a reversible, adiabatic, expansion and then its initial volume was restored by · Thermodynamics

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