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Chemistry PYQ

CSIR NET Chemistry December 2012 — 89 questions

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

  1. Q2 — The compound that will behave as an acid in H₂SO₄ is · Acid and Bases
  2. Q3 — Which ones among CO₃⁻², SO₃, XeO₃, and NO₃⁻¹, have planar structure? · Chemical Bonding
  3. 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
  4. Q5 — Find out the number of lines in the ³¹P NMR signal for diagram · Inorganic Spectroscopy
  5. Q7 — In hydrofomylation reaction using [Rh(PPh₃)₂(CO)(H)] as the catalyst, addition of excess PPh₃, would · Organometallic Compounds
  6. Q8 — Reactions A and B are, termed as respectively. (A) SnCl₂ + Co₂(CO)₈ → (B) Me₂SnCl₂ + + 2NaCl · Organometallic Compounds
  7. Q9 — The correct order of acidity of the compounds A-C is: A B C · General Organic Chemistry
  8. Q10 — The absolute configuration at the two chiral centres of (-)-camphore is: · General Organic Chemistry
  9. Q11 — Given the energy of each gauche butane interaction is 0.9 kcal/mol, G value of the following reaction is (e,e · General Organic Chemistry
  10. Q12 — Degradation of penicillin G gives penicillamine that can utilize nitrogen, oxygen or sulfur atoms as donors · Natural Products
  11. Q13 — The biosynthetic precursor of cadinene is: Cadinene · Natural Products
  12. Q14 — A tripeptide gives the following products on Edman degradation. + The tripeptide is · Natural Products
  13. Q15 — Match the following · Natural Products
  14. Q18 — In the IR spectrum of p-nitrophenyl acetate, the carbonyl absorption band appears at · Organic Spectroscopy
  15. Q23 — The major product formed in the following reaction sequence is 1. CHCl₃, NaOH · Reagents, Reaction Mechanisms & Named Reactions
  16. Q24 — The major product B formed in the following reaction sequence is (A) (B) · Reagents, Reaction Mechanisms & Named Reactions
  17. Q25 — The major product B formed in the following reaction sequence is 1. CH₂N₂, Et₂O (B) · Reagents, Reaction Mechanisms & Named Reactions
  18. Q26 — The major product formed in the following reaction is: 1. Li, liq. NH₃, t-BuOH · Reagents, Reaction Mechanisms & Named Reactions
  19. Q27 — The decomposition of NH₃ on Mo surface follows Langmuir-Hinshelwood mechanism. The decomposition was carried · Chemical Kinetics
  20. Q29 — The rate equation for the reaction 2AB + B₂ → 2AB₂ is given by rate = k[AB][B₂] A possible mechanism · Chemical Kinetics
  21. Q30 — The equilibrium constant for an electrochemical reaction, 2 Fe³⁺+Sn²⁺ ⇌ 2 Fe²⁺+Sn⁴⁺ is [Eo_Fe³⁺/Fe²⁺=0.75 V · Electrochemistry
  22. Q31 — The potential in Debye-Hückel theory is proportional to · Electrochemistry
  23. Q32 — The rotational partition function of H₂ is : · Statistical Thermodynamics
  24. Q33 — The equilibrium population ratio (nj / ni) of a doubly-degenerate energy level (Ej) lying at energy 2 units · Statistical Thermodynamics
  25. Q34 — For water, Δ Hvap ≈ 41 kJ mol⁻¹. The molar entropy of vaporization at 1 atm pressure is approximately · Thermodynamics
  26. Q35 — A carnot takes up 90 J of heat from the source kept at 300K. The correct statement among the following is · Thermodynamics
  27. Q36 — The internal pressure (∂ U/∂ V)T of a real gas is related to the compressibility factor Z = pV/RT by [where · Thermodynamics
  28. Q38 — The correct set of the biologically essential elements is, · Bioinorganic Chemistry
  29. Q39 — Based on the behaviour of the metalloenzymes, consider the following statements (A) In the enzymes, the zinc · Bioinorganic Chemistry
  30. Q40 — Fe²⁺-porphyrins fail to exhibit reversible oxygen transport and cannot differentiate CO from O₂. However, the · Bioinorganic Chemistry
  31. Q41 — Which ones among CO₃²⁻, SO₃, XeO₃ and NO₃⁻, have planar structure? · Chemical Bonding
  32. Q42 — When a hydrogen atom is placed in an electric field along the y-axis, the orbital that mixes most with the · Chemical Bonding
  33. Q43 — In [Mo₂ (S₂)₆]²⁻, cluster the number of bridging S₂²⁻ and coordination number of Mo respectively, are · Coordination Chemistry
  34. Q44 — The light pink color of [Co (H₂ O)₆]²⁺ and the deep blue color of [CoCl₄]²⁻ are due to · Coordination Chemistry
  35. Q45 — The number of possible isomers of [Ru (PPh₃)₂(acac)₂](acac= acetylacetonate) is: · Coordination Chemistry
  36. Q46 — The total number of Cu-O bonds present in the crystalline copper(II) acetate monohydrate is: · Coordination Chemistry
  37. Q47 — The electric dipole allowed transition in a d² atomic system is · Coordination Chemistry
  38. Q48 — Coordination number of " C " in Be₂ C₃ whose structure is correlated with that of CaF₂ is: · Coordination Chemistry
  39. Q50 — The correct spinel structure of Co₃ O₄ is: · Coordination Chemistry
  40. Q51 — The platinum complex of NH₃ and Cl⁻ ligands is an anti-tumour agent. The correct isomeric formula of the · Coordination Chemistry
  41. 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
  42. Q53 — The rate of exchange of OH₂ present in the coordination sphere by ¹⁸OH₂ of, (i) [Cu (OH₂)₆]²⁺ (ii) [Mn · Coordination Chemistry
  43. Q54 — The number of lines exhibited by a high resolution EPR spectrum of the species, [Cu(ethylenediamine)₂]²⁺ is · Inorganic Spectroscopy
  44. 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
  45. Q57 — Which one of the following shows the highest solubility in hot concentrated aqueous NaOH ? · Lanthanides and Actinides
  46. Q58 — Consider the ions Eu(III), Gd(III), Sm(II) and Lu(III). The observed and calculated magnetic moment values · Lanthanides and Actinides
  47. Q59 — For the deposition of Pb by electroplating, the best suited compound among the following is · Main Group Elements
  48. Q60 — The electronegativity differences is the highest for the pair · Main Group Elements
  49. Q61 — Structure of a carborane with formula, C₂ B₄ H₈, is formally derived from · Main Group Elements
  50. Q62 — Boric acid is a weak acid in aqueous solution. But its acidity increases significantly in the presence of · Main Group Elements
  51. Q63 — Silicates with continuous 3D frame work are · Main Group Elements
  52. Q64 — The substitution of η⁵-Cp group with nitric oxide is the easiest for · Organometallic Compounds
  53. Q66 — Complexes of general formula, fac- [Mo(CO)₃(phosphite)₃] have the C-O stretching bands given below · Organometallic Compounds
  54. Q67 — In the cluster [Co₃(CH)(CO)₉] obeying 18e rule, the number of metal-metal bonds and the bridging ligands · Organometallic Compounds
  55. Q69 — Consider the following reaction mechanism The steps A, B and C, respectively, are · Organometallic Compounds
  56. Q70 — Which one of the following will NOT undergo oxidative addition by methyl iodide? · Organometallic Compounds
  57. Q71 — Reactions A and B are, termed as respectively. + 2NaCl · Organometallic Compounds
  58. Q74 — The following transformation involves + H⁺ · Pericyclic Reactions
  59. Q75 — The following photochemical transformation proceeds through · Photochemical Reactions
  60. Q76 — If the concept of half-life is generalized to quarter-life of a first order chemical reaction, it will be · Chemical Kinetics
  61. Q78 — The decomposition of NH₃ on Mo surface follows Langmuir-Hinshelwood mechanism. The decomposition was carried · Chemical Kinetics
  62. Q79 — A radioisotope ₄₁Ar initially decays at the rate of 34,500 disintegrations/minute, but decay rate falls to · Chemical Kinetics
  63. 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 · Chemical Kinetics
  64. 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
  65. Q83 — A chemical reaction involving nonlinear molecule + nonlinear molecule ⇌ nonlinear activated complex. The · Chemical Kinetics
  66. Q84 — The correlation coefficient between two arbitrary variables x and y is zero, if · Data Analysis
  67. Q85 — The Daniel cell is · Electrochemistry
  68. Q86 — Kohlrausch's law is applicable to a dilute solution of · Electrochemistry
  69. Q87 — The equilibrium constant for an electrochemical reaction, is [E_Fe³⁺/Fe²⁺o=0.75 V, E_Sn⁴⁺/Sn²⁺o=0.15 V · Electrochemistry
  70. Q88 — The potential in Debye-Huckel theory is proportional to · Electrochemistry
  71. Q89 — The molecular that has an S₆ symmetry element is · Group Theory
  72. Q90 — The number of IR active vibrational modes of pyridine is: · Group Theory
  73. Q91 — The absorption spectrum of O₂ shows a vibrational structure that becomes continuum at 56875 cm⁻¹. At the · Molecular Spectroscopy
  74. Q92 — The vibrational frequency and anharmonicity constant of an alkali halide are 300 cm⁻¹ and 0.0025 · Molecular Spectroscopy
  75. Q93 — If A and B are non-commuting Hermitian operators, all eigenvalues of the operator given by the commutator [A · Quantum Chemistry
  76. Q94 — The value of commutator [x, px²] is given by · Quantum Chemistry
  77. Q95 — Combining two real wave functions φ₁ and φ₂ the following functions are constructed: A = φ₁ + φ₂, B = φ₁ + · Quantum Chemistry
  78. 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
  79. Q97 — One molecular orbital of a polar molecule AB has the form cAψA + cBψB, where ψA and ψB are normalized atomic · Quantum Chemistry
  80. Q98 — Suppose, the ground stationary state of a harmonic oscillator with force constant 'k' is given by ψ₀ = exp · Quantum Chemistry
  81. Q99 — The energy of a harmonic oscillator in its ground state is 1/2 hω'. According to the virial theorem, the · Quantum Chemistry
  82. Q102 — The difference in energy levels of n = 2 and n = 1 of a particle-in-a one dimensional box is 6 units of · Quantum Chemistry
  83. 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
  84. Q105 — The packing fraction of a simple cubic lattice is close to · Solid State Chemistry
  85. Q106 — Crystal A diffracts from (111) and (200) planes but not from (110) plane, while the crystal B diffracts from · Solid State Chemistry
  86. Q107 — The rotational partition function of H₂ is : · Statistical Thermodynamics
  87. Q108 — Calculate the total number of microstates for 6 identical particles with their occupation numbers {1, 2, and · Statistical Thermodynamics
  88. Q109 — For water, Δ Hvap ≈ 41 kJ mol⁻¹. The molar entropy of vaporization at 1 atm pressure is approximately · Thermodynamics
  89. Q111 — The internal pressure (∂ U/∂ V)T of a real gas is related to the compressibility factor Z = pV/RT by [where · Thermodynamics

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