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Chemistry PYQ

CSIR-NET Chemistry June 2018 — 75 questions

Chemical Sciences, June 2018: every question we hold for this paper, with options, the answer where the source gives one, and an explanation where available.

  1. Q1 — Dinuclear anion [I₂(OH)₂O₈]⁴⁻ has two bridging oxo groups. The geometry around each iodine is- · Chemical Bonding
  2. Q2 — For the following compounds, the correct order of reactivity towards nucleophilic acyl substitution is · General Organic Chemistry
  3. Q3 — The correct statement about the following species is A B · General Organic Chemistry
  4. Q4 — IUPAC nomenclature of the following propellane is · General Organic Chemistry
  5. Q5 — The correct order of rate of solvolysis in 80% ethanol at 25 °C is A B C · General Organic Chemistry
  6. Q6 — The correct statement about the following compounds is: A B · General Organic Chemistry
  7. Q7 — Reaction of D - glucose with following reagents produces Reagents: 1. Acetone, H+; 2. PDC; 3 (EtO)₂ P(O) CH₂ · Natural Products
  8. Q8 — Number of signals observed in the ¹³ C NMR spectrum of the following compound is · Organic Spectroscopy
  9. Q9 — The reaction of [(η⁵-C₅H₅)Fe(CO)₂] with CH₃I gives compound A. The ¹H NMR spectrum of A shows two singlets in · Organic Spectroscopy
  10. Q10 — The correct match of protons in column A with the ¹H NMR chemical shifts in column B for the product of the · Organic Spectroscopy
  11. Q11 — The structure of the intermediate A and the major product B, formed in the following reaction are · Pericyclic Reactions
  12. Q12 — Mechanism of the following transformation involves + · Pericyclic Reactions
  13. Q13 — For the following thermal [2+2] cycloaddition reaction, the correct statement about Transition State (TS) and · Pericyclic Reactions
  14. Q14 — The major products formed in the following photochemical reaction are · Photochemical Reactions
  15. Q15 — The major product formed in the following oxidation reaction is iii) Br₂, CCl₄ · Reagents, Reaction Mechanisms & Named Reactions
  16. Q16 — The major allylic alcohol A and the ester B formed in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
  17. Q17 — The major heterocyclic compound formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions
  18. Q18 — Structure of the intermediate A and the final product B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
  19. Q19 — For an enzyme-substrate reaction, E+S k₋₁k₁⇌ ES, ES k₂ E+P, the slope and intercept of plot between 1/r and · Chemical Kinetics
  20. Q20 — The change in entropy for a reversible adiabatic process is · Thermodynamics
  21. Q21 — In the phase diagram of water, the solid-liquidboundary has a negative slope. The reason for this unusual · Thermodynamics
  22. Q22 — At 300K, the thermal expansion coefficient and isothermal compressibility of liquid water are 2 × 10⁻⁴ K⁻¹ · Thermodynamics
  23. Q23 — The transformation are given in Column 1 and reagent in Column II. Match the items of Column I with those of · Acids and Bases
  24. Q24 — Height equivalent to theoretical plate (HETP) in gas liquid chromatography depends Significantly on which of · Analytical Chemistry
  25. Q25 — For the catalytic activity of Cu and Zn containing enzyme, superoxide dismutase. What is /are the correct · Bioinorganic Chemistry
  26. Q26 — Consider the following statements for the oxygenation of hemocyanine: (A) Oxidation state of both copper · Bioinorganic Chemistry
  27. Q27 — Choose the correct set of statements for cis-platin. (A) It can be prepared from K₂[PtCl₄]. (B) It can be · Bioinorganic Chemistry
  28. Q28 — Dinuclear anion [I₂(OH)₂ O₈]⁴⁻ has two bridging oxo groups. The geometry around each iodine is · Chemical Bonding
  29. Q29 — Removal of an electron form NO molecule results in A. An increase in the (NO) in the IR spectrum B. An EPR · Chemical Bonding
  30. Q30 — Consider the nature of solvents in column I and the corresponding max for l in various solvents given in · Chemical Bonding
  31. Q31 — Identify the correct statements about the electro negativity of groups given below: · Chemical Bonding
  32. Q32 — The total degeneracy of the ground term of CoII (high spin) in octahedral geometry is · Coordination Chemistry
  33. Q33 — High spin complex of a 3d metal ion M has a magnetic moment of 2.9 B.M. in octahedral coordination · Coordination Chemistry
  34. Q34 — For electronic spectra of K₂ CrO₄(A) and K₂ MoO₄(B) the correct combination is · Coordination Chemistry
  35. Q35 — The lowest energy state of a 1s¹2s¹ electronic configuration, according to hund's rule, is · Coordination Chemistry
  36. Q36 — Consider the following statements: (A) Cr²⁺ is easier to oxidize than V²⁺ in the gas phase (B) Cr²⁺ (aq) is a · Coordination Chemistry
  37. Q37 — Consider the statements A - D regarding equation I-III: (I) [Fe(CN)₆]³⁻+ [Co(CN)₅]³⁻ → [Fe(CN)₆]⁴⁻+ · Coordination Chemistry
  38. Q38 — The allowed electronic transition in fluorine molecule is · Coordination Chemistry
  39. Q39 — Trivalent lanthanide ion having isotropic magnetic susceptibility is · Lanthanides and Actinides
  40. Q40 — Match fluorescence colours given in column A with lanthanide ions given in Column B Correct match is · Lanthanides and Actinides
  41. Q41 — The structure of CaB₆ is close to that of · Main Group Elements
  42. Q42 — Among the elements Zn, Ga, Ge as As, the one with the lowest first ionization energy is - · Main Group Elements
  43. Q43 — A binary fluoride (Z) of xenon combines with two moles of NaF to give a product which on hearting to 100° C · Main Group Elements
  44. Q44 — Consider following statements: I: AsCl₅ is thermally less stable than PCl₅. II: Size of As is more than that · Main Group Elements
  45. Q45 — Consider the following statements for Be₂Cl₄ (I), B₂Cl₄ (II) and Ga₂Cl₄ (III): (A) There is an M-M (M = Be · Main Group Elements
  46. Q46 — The correct of C-O bond length is · Organometallic Compounds
  47. Q47 — For the following reaction + ¹³CO → The structure of the intermediate is · Organometallic Compounds
  48. Q48 — The correct increasing order of C-C bond length in the following molecules (A-D) [PtCl₃ (C₂ H₄)]⁻(A), [Pt · Organometallic Compounds
  49. Q49 — Which of the following are NOT closo clusters? [ {Co(η⁵-C₅H₅)}₂(C₂B₆H₈)](A) [B₄C₂H₈](B) [B₁₀H₁₃{Au(PPh₃)}](C) · Organometallic Compounds
  50. Q50 — Identify the pair of molecules which are isoelecronic as well as isostructural from the following [Pd · Organometallic Compounds
  51. Q51 — For the following reaction, correct statement (S) is/are · Organometallic Compounds
  52. Q52 — The reaction of [(η⁵-C₅H₅)Fe(CO)₂]⁻ with CH₃I gives compound A. The ¹H NMR spectrum of A shows two singlets · Organometallic Compounds
  53. Q53 — The structures of [Re₂ Cl₈]²⁻(A) and [Os₂ Cl₈]²⁻(B) are made up of two MCl₄ units. For these structure which · Organometallic Compounds
  54. Q54 — For the Wacker process, pick the correct statement (s) from the following: · Organometallic Compounds
  55. Q55 — Using a double beam UV-visible spectrophotometer, Beer's law fails for K ₂ Cr₂ O₇ solution when · Organic Spectroscopy
  56. Q56 — Mass spectrum of a compound shows [M²⁺] ion peak that is about 4% of M⁺. This indicates that the compound has · Organic Spectroscopy
  57. Q57 — A compound shows following spectral data. ¹ H ~ NMR: δ=7. 9(d, J=8 ~ Hz, 2H), 6. 6(d, J=8 Hz, 2 H), 4.3(q · Organic Spectroscopy
  58. Q58 — The correct match of protons in column A with the ¹ H NMR chemical shifts in column B for the product of the · Organic Spectroscopy
  59. Q59 — For the following thermal [2+2] cycloaddition reaction, the correct statement about Transition State (TS) and · Pericyclic Reactions
  60. Q60 — The major products formed in the following photochemical reaction are · Photochemical Reactions
  61. Q61 — Elementary steps of a reaction are as follows A+B [k₋₁]k₁ 2 C 2 C k₂ D If steady state approximation is · Chemical Kinetics
  62. Q62 — For an enzyme-substrate reaction, E+S k₋₁k₁⇌ ES the slope and intercept of plot between 1 / r and 1 /[S] are · Chemical Kinetics
  63. Q63 — Difference between-activation energies of the reverse and forward steps of a reversible reaction is 9.212 RT · Chemical Kinetics
  64. Q64 — For a second-order reaction, the straight line among the following plots is · Chemical Kinetics
  65. Q65 — A Gaussian distribution has the functional form f(x)=22 a² π e-(x-b)² / 2 a². The variance of such · Data Analysis
  66. Q66 — The equilibrium constant of the following reaction: Sn(s)+Sn⁴⁺(aq) ⇔ 2 Sn²⁺(aq) At 300 K is closest to · Electrochemistry
  67. Q67 — In the pure Raman rotational spectrum of ¹⁶ O₂, whose electronic ground state is ³Σg, transitions between · Molecular Spectroscopy
  68. Q68 — A symmetric top molecule, among the following, is · Molecular Spectroscopy
  69. Q69 — Assuming harmonic approximation, the energy change for the reaction HCl+D₂ → DCl+HD in cm⁻¹ is (the · Molecular Spectroscopy
  70. Q70 — A 5 g / L polymer solution is prepared with a polymer whose molar mass is 25 kg the osmotic pressure (in atm) · Polymer Chemistry
  71. Q71 — If all the lattice points of an FCC structure are occupied by uniform hard spheres that touch each other, the · Solid State Chemistry
  72. Q72 — The (002) plane of an elemental FCC crystal diffracts X-rays (λ=0.154 nm) at Bragg angle 90°. the density of · Solid State Chemistry
  73. Q73 — Translational partition function of a D₂ molecule confined in 100 cm vessel at 25 C is · Statistical Thermodynamics
  74. Q74 — The change in entropy for a reversible adiabatic process is · Thermodynamics
  75. Q75 — At 300 K, the thermal expansion coefficient and isothermal compressibility of liquid water are 2 × 10⁻⁴ K⁻¹ · Thermodynamics

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