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Chemistry PYQ

CSIR NET Chemistry December 2014 — 83 questions

Chemical Sciences, December 2014: every question we hold for this paper, with options, the answer where the source gives one, and an explanation where available.

  1. Q1 — The gas commonly used in generating plasma in Inductively Coupled Plasma Atomic Emission Spectroscopy · Analytical Chemistry
  2. Q3 — The compound that is antiaromatic is (I) (II) (III) (IV) · General Organic Chemistry
  3. Q4 — The increasing order of pKa values of the circled hydrogens in the following compounds is (I) (II) (III) · General Organic Chemistry
  4. Q6 — The biosynthetic precursor of abietic acid is · Natural Products
  5. Q7 — The amino acid constituents of artificial sweetener given below are · Natural Products
  6. Q8 — The mass of metastable ion produced due to decomposition of F₁⁺ in the following mass fragmentation sequence · Organic Spectroscopy
  7. Q11 — The major product formed in the following reaction sequence is: 1. Me₂C(OMe)₂, TsOH (cat.) 2. BH₃, THF 3. H₃O⁺ · Reagents, Reaction Mechanisms & Named Reactions
  8. Q13 — The major product formed in the following reaction is: 1. H₃O⁺, hν 2. NaOH · Reagents, Reaction Mechanisms & Named Reactions
  9. Q15 — The products A and B in the following reaction sequence are: LDA A [CuCl, DMF-H₂O]PdCl₂, O₂ B [2. H₃O⁺]1 · Reagents, Reaction Mechanisms & Named Reactions
  10. Q16 — The products A and B in the following reaction sequence are: A [THF, EtOH]SmI₂ B · Reagents, Reaction Mechanisms & Named Reactions
  11. Q19 — The major product of the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
  12. Q20 — The major product of the following reaction is: 1. Methoxybenzaldehyde, H⁺ 2. DIBAL-H, -78 to 40°C · Reagents, Reaction Mechanisms & Named Reactions
  13. Q21 — The major product of the following reaction is: 1. Zn, AcOH · Reagents, Reaction Mechanisms & Named Reactions
  14. Q23 — The products A and B in the following reaction sequence are 2. ICH₂CH₂CH₂Cl A [2. H₃O⁺]1. MeMgBr, Et₂O B · Reagents, Reaction Mechanisms & Named Reactions
  15. Q24 — For an enzyme-substrate reaction, a plot between 1/v and 1/([S₀]) yields a slope of 40 s. If the enzyme · Chemical Kinetics
  16. Q25 — For a gaseous reaction, 2NO(g) + Cl₂(g) → Non-linear T.S. → 2NOCl, the pre-exponential factor in the rate · Chemical Kinetics
  17. Q26 — The rate constant for a reaction A⁺+Bⁿ⁺¹ → P is measured in two different aqueous solutions of ionic · Chemical Kinetics
  18. Q28 — The product σxy.S₄z (S₄z is the four fold improper axis of rotation around the z-axis, and σxy is the · Group Theory
  19. Q29 — Identify the speed distribution functions of Ne, Ar, and Kr with the curves in the figure below · Gaseous State
  20. Q30 — For a polydispersed macromolecular colloid, osmometry gives · Polymer Chemistry
  21. Q31 — A sample experiment revealed that PVC formed in the medium has (Mn) = 13, and (Mw) = 16, where (Mn) stands · Polymer Chemistry
  22. Q33 — When T → ∞, value of the single-particle partition function will be (given : degeneracy of level j = gj) : · Statistical Thermodynamics
  23. Q34 — The probability of finding the harmonic oscillator in the energy level n=1 is (neglect zero point energy and · Statistical Thermodynamics
  24. Q35 — Identify the speed distribution functions of Ne, Ar and Kr with the curves in the figure above: · Statistical Thermodynamics
  25. Q36 — The exact differential df of a state function f(x, y), among the following is · Thermodynamics
  26. Q38 — The extent of π-electron conjugation in macrocyclic rings of (1) heme, (2) coenzyme B₁₂ and (3) chlorophyll · Bioinorganic Chemistry
  27. Q39 — The number of histidine amino acid nitrogen atoms coordinated to bimetallic active site of oxyhemocyanin, and · Bioinorganic Chemistry
  28. Q40 — Identify correct statements for mercury as an environment pollutant. A. Carbanionicbiomethylation converts it · Bioinorganic Chemistry
  29. Q41 — Under physiological condition, oxygen is binding to deoxyhemoglobin and deoxymyoglobin, the binding curve and · Bioinorganic Chemistry
  30. Q42 — Match the metalloproteins in Column-A with their function in Column-B The correct answer is · Bioinorganic Chemistry
  31. Q46 — The geometries of [Br₃]⁺and [I₅]⁺respectively, are · Chemical Bonding
  32. Q47 — The S and L values for ¹⁵N atom respectively, are · Coordination Chemistry
  33. Q48 — In the following reaction [PtCl₄]²⁻+NO₂⁻, is → A+NH₃ → B, compound B is · Coordination Chemistry
  34. Q50 — An aqueous solution of [Mn (H₂ O)₆]²⁺ complex is pale pink in colour. The probable reasons for it are (A) · Coordination Chemistry
  35. Q51 — Base hydrolysis of [CoCl (NH₃)₅]²⁺ is an overall second order reaction, whereas that of [Co(CN)]³⁻ is of · Coordination Chemistry
  36. Q52 — The configuration [Ne] 2p¹3p¹ has a ³D term. Its levels are · Coordination Chemistry
  37. Q53 — The spin-only magnetic moment and the spectroscopic ground state term symbol of manganese center in [MnF₆]³⁻ · Coordination Chemistry
  38. Q54 — The three dimensional structure of compound [Co (Co (NH₃)₄(OH)₂)₃] Br₆, has · Coordination Chemistry
  39. Q55 — The spin-only and spin plus orbital magnetic moments of [CrCl₆]⁻³ are · Coordination Chemistry
  40. Q56 — EPR spectrum of a free radical containing nuclei with nonzero nuclear spin is obtained if the following · Inorganic Spectroscopy
  41. Q57 — The correct order of the retention of cations on a sulfonated cation exchange resin column is · Lanthanides and Actinides
  42. Q58 — Hindered β-diketonates like dpmH(dpmH= dipivaloylmethane) are used for the separation of lanthanides because · Lanthanides and Actinides
  43. Q59 — The reaction between SbF₅ and two equivalents of HF leads to the formation of · Main Group Elements
  44. Q60 — Among F⁻, Na⁺, O²⁻ and Mg²⁺ ions, those having the highest and the lowest ionic radii respectively are · Main Group Elements
  45. Q62 — A borane (X) is reacted with ammonia to give a salt of borohydride (Y). The ¹¹B NMR spectrum of Y consists of · Main Group Elements
  46. Q63 — 12-Crown-4 binds with the alkali metal ions in the following order : Li⁺ Na⁺>K⁺>Cs⁺. It is due to the · Main Group Elements
  47. Q64 — The main products of the reaction of equimolar quantities of XeF₆ with NaNO₃ are · Main Group Elements
  48. Q65 — The hepticities 'x' and 'y' of the arene moieties in the diamagnetic complex [ (ηx-C₆ H₆) Ru (ηy-C₆ H₆)] · Organometallic Compounds
  49. Q66 — The rate of the reaction Ni(CO)₄+PPh₃ Δ [Ni(CO)₃ (PPh₃)]+CO depends on · Organometallic Compounds
  50. Q67 — The product of the reaction of propene, CO and H₂ in the presence of Co₂(CO)₈ as a catalyst is · Organometallic Compounds
  51. Q69 — Reductive elimination step in hydrogenation of alkenes by Wilkinson catalyst results in (neglecting solvent · Organometallic Compounds
  52. Q70 — Na [ (η⁵-C₅H₅)Fe(CO)₂] reacts with Br₂ to give A. Reaction of A with LiAlH₄ results in B. The proton NMR · Organometallic Compounds
  53. Q71 — The compound that undergoes oxidative addition reaction in presence of H₂, is · Organometallic Compounds
  54. Q72 — ¹H NMR spectrum of free benzene shows a peak at -7.2 ppm. The expected chemical shift (in ppm) of C₆H₆ ligand · Organometallic Compounds
  55. Q73 — According to Wade's rule, anion C₂ B₉ H₁₂ adopts · Organometallic Compounds
  56. Q75 — Complexes HM(CO)₅ and [ (η⁵-C₅ H₅) M′(CO)₃]₂ obey the 18-electron rule. Identify M and M′ and their ¹H NMR · Organometallic Compounds
  57. Q76 — In the IR spectrum, the absorption band due to carbonyl group in phenyl acetate appears at · Organic Spectroscopy
  58. Q78 — The mass of metastable ion produced due to decomposition of F₁ ⁺ in the following mass fragmentation sequence · Organic Spectroscopy
  59. Q79 — The ratio of the relative intensities of the carbon signals in the first order ¹³C NMR spectrum of CD₃Cl is · Organic Spectroscopy
  60. Q82 — The major product of the following reaction is · Pericyclic Reactions
  61. Q83 — The cyclic product(s) of the following photochemical reaction is(are) · Photochemical Reactions
  62. Q85 — For an enzyme-substrate reaction, a plot between 1/v and 1/[S₀] yields a slope of 40 s. If the enzyme · Chemical Kinetics
  63. Q86 — The rate constant for a reaction A³⁺+Bⁿ⁺¹ → P is measured in two different aqueous solutions of ionic · Chemical Kinetics
  64. Q87 — A reaction A + B + C D follows the mechanism A + B ⇌ AB; AB + C → D in which first step remains essentially · Chemical Kinetics
  65. Q88 — Which of the following will result in deviation from Beer's law ? 1. Change in refractive index or medium. 2 · Chemical Kinetics
  66. Q92 — The character table of C2 v point group is given below. In cis-butadiene molecule the vibrational modes · Group Theory
  67. Q93 — The product σxy.S₄z (S₄z is the four fold improper axis of rotation around the z-axis, and σxy is the · Group Theory
  68. Q94 — Bond lengths of homonuclear diatomic molecules can be determined with the help of both · Molecular Spectroscopy
  69. Q95 — If the component of the orbital angular momentum along the molecular axis of a heteronuclear diatomic · Molecular Spectroscopy
  70. Q97 — The fraction of groups condensed at time in any stepwise condensation polymerization (overall second order) · Polymer Chemistry
  71. Q98 — For a polydispersed macromolecular colloid, osmometry gives · Polymer Chemistry
  72. Q100 — X-ray diffraction does not give any structural information for · Solid State Chemistry
  73. Q101 — A solid consisting of only X-atoms has a close-packed structure with X-X distance of 160 pm. Assuming it to · Solid State Chemistry
  74. Q102 — The low and high temperature limits of vibrational partition function are (θ = hν/k) : · Statistical Thermodynamics
  75. Q103 — The number of microstates that are possible, when two particles are distributed in four states such that the · Statistical Thermodynamics
  76. Q104 — When T → ∞, value of the single-particle partition function will be (given : degeneracy of level j = gj) : · Statistical Thermodynamics
  77. Q105 — The probability of finding the harmonic oscillator in the energy level n = 1 is (neglect zero point energy · Statistical Thermodynamics
  78. Q106 — Identify the speed distribution functions of Ne, Ar and Kr with the curves in the figure above: · Statistical Thermodynamics
  79. Q108 — For a process in a closed system, temperature is equal to · Thermodynamics
  80. Q109 — The exact differential df of a state function f(x, y), among the following is · Thermodynamics
  81. Q110 — Given the following two relations, x₁ dμ₁ + x₂ dμ₂ = 0 And x₁ dV₁ + x₂ dV₂ = 0 for a binary liquid mixture at · Thermodynamics
  82. Q111 — At high pressure, the fugacity coefficient of a real gas is greater than one, because · Thermodynamics
  83. Q113 — The major product of the following reaction is · Pericyclic Reactions

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