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Chemistry PYQ

CSIR-NET Chemistry June 2019 — 87 questions

Chemical Sciences, June 2019: every question we hold for this paper, with options, the answer where the source gives one, and an explanation where available.

  1. Q1 — The reaction of IO₃⁻ with I⁻ in aqueous acidic medium results in · Acids and Bases
  2. Q2 — Among the following reactions, those that are feasible in liquid NH₃ are (I) KNO₃ + AgCl → KCl + AgNO₃ (II) · Acids and Bases
  3. Q3 — The cations formed upon dissolving SnF₄ and AuF₃ in liquid BrF₃ separately, respectively are · Acids and Bases
  4. Q4 — The role of H₃PO₄ in the estimation of Fe (II) with K₂Cr₂O₇ using diphenylamine sulphonate as indicator is to · Analytical Chemistry
  5. Q5 — In the following equilibrium, conformer B is more stable than A when R is · General Organic Chemistry
  6. Q6 — The relationship between A and B is A B · General Organic Chemistry
  7. Q7 — The most stable conformation of the following molecule is: · General Organic Chemistry
  8. Q8 — Reaction of deoxymonosaccharide A with 2 equivalents of HIO₄ affords propanedial, formic acid and · Natural Products
  9. Q9 — the term symbol for ground state dinitrogen cation radical (N₂⁺) is · Atomic and Molecular Term Symbol
  10. Q10 — Photochemistry of a molecule, M, is described as by the mechanism The intercept at [Q]=0 is 4 for the inverse · Chemical Kinetics
  11. Q11 — If the overpotential of an electrolysis process is increased from 0.5 V to 0.6 V, then the ratio of current · Electrochemistry
  12. Q12 — The Berge-Sponer plot between Δ Gv+1/2=(εv+1-εv) and (v+1) for CO ia a straight line with slope of -14 cm⁻¹ · Molecular Spectroscopy
  13. Q13 — 1.5T and 7.0 T are N' and N, respectively. The value of ln (N′)/N in (γ, h, k, T are gyromagnetic ratio of · Statistical Thermodynamics
  14. Q14 — The populations of proton spins in the highest energy level of a sample in magnetic fields of 1.5T and 7.0 T · Statistical Thermodynamics
  15. Q15 — One mole of a mono-atomic ideal gas is transformed from 300 K and 2 atm to 600 K and 4 atm. The entropy · Thermodynamics
  16. Q16 — A non-ideal gas, follows the equation P=R T/Vm [1+B/Vm] where B is a function of temperature only. The · Thermodynamics
  17. Q17 — The chemical potential (μ) of a 2 molar Na₂SO₄ solution is expressed in terms of mean ionic activity · Thermodynamics
  18. Q18 — The cations formed upon dissolving SnF₄ and AuF₃ in liquid BrF₃ separately, respectively are · Acids and Bases
  19. Q19 — The role of H₃ PO₄ in the estimation of Fe (II) with K₂ Cr₂ O₇ using diphenylamine sulphonate as ndicator is · Analytical Chemistry
  20. Q20 — Incorrect statement for amperometric titration is · Analytical Chemistry
  21. Q21 — The metal transferred by bacteria and fungi using siderophores/siderochromes is · Bioinorganic Chemistry
  22. Q22 — The correct match for the compounds in Column-I with the property in Column-II is · Bioinorganic Chemistry
  23. Q23 — Consider the following statements with respect to Cytochrome P-450 (A) It has histidine coordinated to iron · Bioinorganic Chemistry
  24. Q24 — Consider the following transformation, reactions in the context of co-enzyme mathrmB₁₂ (A) 1,2-Carbon shift · Bioinorganic Chemistry
  25. Q25 — Hydrogen Bonding Weak Interactions · Chemical Bonding
  26. Q26 — Among the following, the correct statement about π-molecular orbitals (π-MOs) of benzene is · Chemical Bonding
  27. Q27 — Match the appropriate geometry on the right with each of the speices on the left · Chemical Bonding
  28. Q28 — Self-exchange electron transfer is fastest in · Coordination Chemistry
  29. Q29 — Consider the following reaction: Hg²⁺(aq)+X⁻(aq)=[HgX]⁺(aq) The stability constants for [HgX]⁺(aq) for X=F · Coordination Chemistry
  30. Q30 — The correct set of information is · Coordination Chemistry
  31. Q31 — Consider the following statements regarding electronic spectra of high spin complexes (A) Ti³⁺ complexes · Coordination Chemistry
  32. Q32 — Hydrolysis of trans-[CoLCl(en)₂]⁺ (L = NO₂⁻, NCS⁻, OH⁻, Cl⁻) results in a product (A). The tendency to form · Coordination Chemistry
  33. Q33 — Donor mode of NO ligand depends on the metal. Now, consider the following complexes (in gaseous state). (A) · Coordination Chemistry
  34. Q34 — An aqueous solution of metal ion (A) gives a blood-red colored product (B) upon reaction with KSCN. Upon · Coordination Chemistry
  35. Q35 — Correct order of molar extinction coefficient values of the visible absorption bands for the following · Coordination Chemistry
  36. Q36 — The correct statement about base hydrolysis of [Co(py)₄ Cl₂]⁺(py-pyridine) is · Coordination Chemistry
  37. Q37 — FeCr₂ O₄ and NiGa₂ O₄ have normal and inverse spinel structures, respectively. The correct statement is · Coordination Chemistry
  38. Q38 — The correct match of spin-only magnetic moment for the complexes cis- [Fe(phen)₂(NCS-N)₂] (A) and · Coordination Chemistry
  39. Q39 — In the electronic spectrum of [IrBr₆]²⁻, the number of charge transfer band(s) and their origin are · Coordination Chemistry
  40. Q40 — For the given reaction [ * Co(L)n]²⁺+ [Co(L)n]³⁺ → [ * Co(L)n]³⁺+ [Co(L)n]²⁺ the correct statement with · Coordination Chemistry
  41. Q41 — The number of geometrical isomers of the complex [RhH(C ≡ CR)₂ (PMe₃)₃] is · Coordination Chemistry
  42. Q42 — The products A and B for the given reaction [Co (NH₃)₅ Cl]²⁺+ [Cr (OH₂)₆]²⁺+5 H₃ O⁺ → A+B are respectively, · Coordination Chemistry
  43. Q43 — The number of expected electronic transitions in [Cr(en)₃]³⁺ and trans- [Cr(en)₂ F]⁺ at 4 K is, respectively · Coordination Chemistry
  44. Q44 — The term symbol for the ground state of dinitrogen cation radical (N₂)⁺is · Coordination Chemistry
  45. Q45 — The calculated heat of formation (Δ Hf) for NaCl₂ and CaF is · Coordination Chemistry
  46. Q46 — The coordination number of Gd in GdCl₃.6 H₂ O is · Lanthanides and Actinides
  47. Q47 — The species that results by replacing one quarter of Si(IV) in pyrophyllite [Al₂(OH)₂ Si₄ O₁₀] with Al(III) · Main Group Elements
  48. Q48 — The oxidation state of sulphur in the dithionous and dithionic acids, respectively, are · Main Group Elements
  49. Q49 — In the synthesis of polydimethylsiloxane, the chain forming, branching and terminating agents respectively · Main Group Elements
  50. Q50 — The correct statements regarding Boron among the following (1) Nuclear spin of ¹¹ B is greater than that of · Main Group Elements
  51. Q51 — Choose the correct statement(s) among the following (I) LiF is more soluble than LiClO₄ in water. (II) The · Main Group Elements
  52. Q52 — Choose the correct statement(s) among the following (1) The dihedral angle in O₂F₂ is 0°. (II) OF₂ is · Main Group Elements
  53. Q53 — In neutron activation analysis the radiation commonly detected is · Nuclear Chemistry
  54. Q54 — The number of Ni-Ni bonds in [CpNi (μ-PPh₂)]₂ complex obeying the 18 electron rule is · Organometallic Compounds
  55. Q55 — The organic species isolobal to [Fe(CO)₂ (PPh₃)]⁻is · Organometallic Compounds
  56. Q56 — A plausible structure of the intermediate involved in the following reaction [Fe(η⁵-C₅H₅)(CH₃)(CO)₂] + PPh₃ → · Organometallic Compounds
  57. Q57 — The number of ' H NMR signals observed for the following compound is · Organic Spectroscopy
  58. Q58 — The compound that will show a base peak at m / z 120 in its EI mass spectrum is · Organic Spectroscopy
  59. Q59 — The compound that exhibits the following spectral data is IR: (ν) 1685 cm⁻¹; ¹H NMR: δ = 7.84 (d, J=8 Hz · Organic Spectroscopy
  60. Q60 — The major product formed in the following reaction is: Δ · Pericyclic Reactions
  61. Q61 — Structures of the products A and B in the following photo-deprotection reactions are: · Photochemical Reactions
  62. Q62 — The major product formed in the following reaction is: · Photochemical Reactions
  63. Q63 — If the half-life of a reaction is inversely proportional to the square of the concentration of the reactant · Chemical Kinetics
  64. Q64 — The gas phase decomposition of A at 1000K follows two decomposition paths. The maximum theoretical percentage · Chemical Kinetics
  65. Q65 — A physical observable, 'x', appears with the probability distribution e(-|2 x-12|) the average of x would be · Data Analysis
  66. Q66 — The mobility of a divalent cation in water is 8 × 10⁻⁸ m² V⁻¹ S⁻¹. The effective radius of the ion is · Electrochemistry
  67. Q67 — If the over potential of an electrolysis process is increased from 0.5V to 0.6V, then the ratio of current · Electrochemistry
  68. Q68 — The π-orbital p₁+p₂-p₃-p₄ of cis-butadiene belongs to the irreducible representation · Group Theory
  69. Q69 — The number of times A₁ representation appears in the representation Γ of the C2 v point group given below is · Group Theory
  70. Q70 — The correct statements about HCl and DCl, among the following is · Molecular Spectroscopy
  71. Q71 — The Berge-Sponer plot between Δ Gv+1/2= (εv+1-εv) and v+1 for CO in a straight line with slope of -14 cm⁻¹ · Molecular Spectroscopy
  72. Q72 — The degree of polymerisation () and the fraction of monomer consumed (P) for apolymerization reaction are · Polymer Chemistry
  73. Q73 — The reaction rate of a self-catalyzed polyesterification reaction is given as -(d[COOH])/dt=k[COOH]²[OH] If · Polymer Chemistry
  74. Q74 — The correct relationship among the following, for a tetragonal (a=b ≠ c, α=β=γ=90°) crystal system, is · Solid State Chemistry
  75. Q75 — Nearest neighbour distance in a crystal system of side length a is a/(√(2)) in · Solid State Chemistry
  76. Q76 — A certain system of non interacting particles has the single-particle partition function f=A Tm/V where A is · Statistical Thermodynamics
  77. Q77 — The allowed transition among the following is · Statistical Thermodynamics
  78. Q78 — The rotational partition function is expected to be the smallest for the molecule, among the following · Statistical Thermodynamics
  79. Q79 — For a linear molecule the mean energies for translation, rotation (T θr) and vibration (T θv) follow ratio: · Statistical Thermodynamics
  80. Q80 — The populations of proton spins in the highest energy level of a sample in magnetic fields of 1.5T and 7.0 T · Statistical Thermodynamics
  81. Q81 — The difference between standard molar entropies of two mono-atomic gases (A) and (B) (Sm, A⁰-Sm, B⁰) at a · Statistical Thermodynamics
  82. Q82 — Above the critical micelle concentration (CMC), the option which correctly describes the variation of molar · Surface Chemistry
  83. Q83 — One mole of a mono-atomic ideal gas is transformed from 300 K and 2 atm to 600 K and 4 atm. The entropy · Thermodynamics
  84. Q84 — A non-ideal gas, follows the equation P=R T/Vm [1+B/Vm] where B is a function of temperature only. The · Thermodynamics
  85. Q85 — When two moles of liquid A are mixed with two moles of liquid B at 300 K, the excess molar Gibbs energy of · Thermodynamics
  86. Q86 — A sample of 2.0 moles of O₂(g) (assumed ideal) at 500 K is expanded from 5 L to 50 L under adiabatic and · Thermodynamics
  87. Q87 — The chemical potential (μ) of a 2 molar Na₂ SO₄ solution is expressed in terms of mean ionic activity · Thermodynamics

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