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Chemistry PYQ

CSIR-NET Chemistry June 2017 — 79 questions

Chemical Sciences, June 2017: every question we hold for this paper, with options, the answer where the source gives one, and an explanation where available.

  1. Q1 — The compound that gives a basic solution in HF is : · Acids and Bases
  2. Q2 — The IUPAC name of the following compound is · General Organic Chemistry
  3. Q3 — The correct match of natural products in Column-I with their biosynthetic precursors in Column-II is Column-I · Natural Products
  4. Q4 — Among the following, the natural product that is a steroid and contains an α, β-unsaturated ketone is · Natural Products
  5. Q5 — The major product formed in the reaction of D-glucose with ZnCl₂ in MeOH is a methyl glucopyranoside (A or · Natural Products
  6. Q6 — ¹³ C NMR spectrum of DMSO- d₆ gives a signal at δ 39.7 ppm as a · Organic Spectroscopy
  7. Q7 — The correct structure of the compound based on the following characteristic spectral data is IR: 1736 cm⁻¹ ¹H · Organic Spectroscopy
  8. Q8 — The major product formed in the sodium ethoxide mediated reaction between benzophenone and chloroacetate is · Reagents, Reaction Mechanisms & Named Reactions
  9. Q9 — The intermediate A and product B formed in the following sequence are: · Reagents, Reaction Mechanisms & Named Reactions
  10. Q10 — The correct combination of reagents to effect the following reaction is: · Reagents, Reaction Mechanisms & Named Reactions
  11. Q11 — The correct combination of reagents A and B to effect the following transformations are <- B <- -- A --> · Reagents, Reaction Mechanisms & Named Reactions
  12. Q12 — The intermediate A and the major product B formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions
  13. Q13 — for the electronic configuration 1 s² 2 s¹ 2 p⁴ two of the possible term symbols are ¹ S and ³ P. the · Atomic and Molecular Term Symbol
  14. Q14 — A solution of Fe³⁺ is titrated potentiometrically using Ce³⁺ solution at 25 °C. The emf (in V) of the redox · Electrochemistry
  15. Q15 — The standard cell potential of cell, Pt | H₂(g) | HBr(aq) | AgBr(s) | Ag(s), was measured over a range of · Electrochemistry
  16. Q16 — The v=0 to 1 vibration-rotation spectrum of a diatomic molecule exhibits transitions for R(0), R1, P(1) and · Molecular Spectroscopy
  17. Q17 — For a certain magnetic field strength, a free proton spin transition occurs at 700 MHz. Keeping the magnetic · Molecular Spectroscopy
  18. Q18 — The correct statement for any cyclic thermodynamic process is · Thermodynamics
  19. Q19 — Match items in column A with items in column B: · Acids and Bases
  20. Q20 — Identify the correct statement(s) for phosphorimetric measurement from the following: A. It is done after a · Analytical Chemistry
  21. Q21 — Identify correct statements from the following: A. Area of differential thermal analysis peak is proportional · Analytical Chemistry
  22. Q22 — The resonance Raman stretching frequencies (in cm⁻¹) of the bound O₂ species in oxyhemerthyrin and · Bioinorganic Chemistry
  23. Q23 — In vitro reaction of an excess of O₂ with free heme B in aqueous medium the end product is · Bioinorganic Chemistry
  24. Q24 — Consider the following statements for metallothioneins: A. the contain about 30% cysteine residues B. they · Bioinorganic Chemistry
  25. Q25 — Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin: A. they are involved in O₂ · Bioinorganic Chemistry
  26. Q26 — Based on VSEPR theory, the predicted shapes of [XeF₅]⁻and BrF₅ respectively, are · Chemical Bonding
  27. Q27 — The relative rates of water exchange for the hydrated complexes of (1) Ni²⁺ (2) V²⁺ and (3) Cr³⁺ ions follows · Coordination Chemistry
  28. Q28 — Consider the following statements for octahedral complexes. (a) [CrF₆]³⁻ (b) [Cr(ox)₃]³⁻ and (c) [Cr(en)₃]³⁺ · Coordination Chemistry
  29. Q29 — Match the items in the three columns. The correct answer is · Coordination Chemistry
  30. Q30 — Mössbauer spectrum of complex [Fe(1,10-phenanthroline)₂(NCS)₂] shows two lines at 300 K, four lines at 186 K · Inorganic Spectroscopy
  31. Q31 — (R₃Ge)₂ on photolysis gives a radical which shows ESR spectrum. The ESR signals carrying the signature of · Inorganic Spectroscopy
  32. Q32 — The ³¹P(¹H) NMR spectrum of 2,2,6,6-N₄P₄Cl₄(NMe₂)₄ is expected to show · Inorganic Spectroscopy
  33. Q33 — Which one of the following pairs has two magic numbers for closed nuclear shells? · Lanthanides and Actinides
  34. Q34 — The calculated and observed magnetic moments (in B.M.) of aqua complex of a lanthanide ion are 0 and ~3.5 · Lanthanides and Actinides
  35. Q35 — Both potassium and sulfuric acid form intercalation compounds with graphite. The graphite layers are · Main Group Elements
  36. Q36 — Addition of two electrons to the bismuth cluster Bi₅³⁺ results in a change of structure type from · Main Group Elements
  37. Q37 — The compound N₂ F₂ has two isomers. Choose the correct option from the following: · Main Group Elements
  38. Q38 — Choose the correct statement for magnitude of threshold energy of an endoergic nuclear reaction between · Nuclear Chemistry
  39. Q39 — Consider following statements for fission of U²³⁵ with thermal neutrons. A. The% of nuclei undergoing · Nuclear Chemistry
  40. Q40 — Choose the isoelectronic pair among the following: A. [V(CO)₆] B. [Cu(η⁵-C₅H₅)(CO)] C. [Co(CO)₄]⁻ D · Organometallic Compounds
  41. Q41 — An organometallic fragment that is isolobal to CH₃ ⁺is · Organometallic Compounds
  42. Q42 — Reaction of Na [Mn(CO)₅] with H₃ C=CHCH₂ Cl gives A along with NaCl. Photolysis of compound A results in · Organometallic Compounds
  43. Q43 — The number of bonding molecular orbitals and the number of available skeletal electrons in [B₆ H₆]²⁻ · Organometallic Compounds
  44. Q44 — Addition of NaBH₄ to [ (η⁵-Cp) Fe (η⁶-C₆ H₆)]⁺will give · Organometallic Compounds
  45. Q45 — The μeff [Fe(S₂CNEt₂)₃] changes with temperature with the involvement of two electronic states. The states are · Organometallic Compounds
  46. Q46 — Identify the product in the reaction between and CH₃I going at room temperature via SN2 mechanism · Organometallic Compounds
  47. Q47 — The correct structure of the compound based on the following characteristic spectral data is IR: 1736 ~ c m⁻¹ · Organic Spectroscopy
  48. Q48 — Following reaction is an example of · Pericyclic Reactions
  49. Q49 — Following reaction is an example of · Pericyclic Reactions
  50. Q50 — Following reaction involves · Pericyclic Reactions
  51. Q51 — The major product formed in the following reaction is: · Photochemical Reactions
  52. Q52 — If the pre-exponential factor in Arrhenius equation is 1.6 × 10¹² s⁻¹, the value of the rate constant at · Chemical Kinetics
  53. Q53 — In kinetic study of a chemical reaction, slopes are drawn at different times in the plot of concentration of · Chemical Kinetics
  54. Q54 — Photochemical decomposition of HI takes place with the following mechanism HI+hv (Ia) → H+I H+HI k₁ H₂+I · Chemical Kinetics
  55. Q55 — In a enzyme catalyzed reaction: E+S k₋₁k₁⇌ ES k₂ E+P k₂=3.42 × 10⁴ s⁻¹. If [E]₀=1.0 × 10⁻² mol dm⁻³, the · Chemical Kinetics
  56. Q56 — Arrhenius equations for two chemical reactions are: k₁=A₁ e-E₁ / RT, k₂=A₂ e-E₂ / RT. If E₁>E₂ then at a · Chemical Kinetics
  57. Q57 — The electrochemical cell potential (E), after the reactants and products reach equilibrium, is (E⁰. is the · Electrochemistry
  58. Q58 — The specific conductance of a solution is 0.176 Ω⁻¹ cm⁻¹. If the cell constant is 0.255 cm⁻¹, the conductance · Electrochemistry
  59. Q59 — The standard cell potential for the reaction Zn(s)+Cu²⁺(aq) ⇔ Zn²⁺(aq)+Cu(s) is +1.10 V. The Gibbs free · Electrochemistry
  60. Q60 — A solution of Fe³⁺ is titrated potentiometrically using Ce³⁺ solution at 25°C. The emf (in V) of the redox · Electrochemistry
  61. Q61 — The standard cell potential of cell, Pt |H₂(g) | HBr(aq)|AgBr(s)| Ag(s), was measured over a range of · Electrochemistry
  62. Q62 — The correct relation involving symmetry operations · Group Theory
  63. Q63 — For a point group, an incomplete character table is given below with one irreducible representation missing · Group Theory
  64. Q64 — Given below is a specific vibrational mode of BCl₃ with ⊕ and ⊖ denoting movements of the respective atoms · Group Theory
  65. Q65 — For a certain magnetic field strength, a free proton spin transition occurs at 700 MHz. Keeping the magnetic · Molecular Spectroscopy
  66. Q66 — The first electronic absorption band maximum of a polar and relatively rigid aromatic molecule appears at 310 · Molecular Spectroscopy
  67. Q67 — For a monodisperse polymer, the number-average molar mass (MN) and weight-average molar mass (Mw) are related · Polymer Chemistry
  68. Q68 — A polydisperse polymer sample has ten molecules of molar mass 20,000 g mol⁻¹ and fifteen molecules of molar · Polymer Chemistry
  69. Q69 — Metallic silver crystallizes in face-centred-cubic lattice structure with a unit cell of length 40 nm. The · Solid State Chemistry
  70. Q70 — Polonium is the only metal known to exist in a simple cubic lattice form. The density of polonium at 0°C is · Solid State Chemistry
  71. Q71 — Consider a system of three particles which can occupy energy levels with energy 0, ∈ and 2 ∈, such that the · Statistical Thermodynamics
  72. Q72 — The first excited state (² P1 / 2) of fluorine lies at an energy of 400 cm⁻¹ above the ground state (² P3 / · Statistical Thermodynamics
  73. Q73 — An intense purple colour (Plasmon band) is exhibited by a colloid consisting of spherical · Surface Chemistry
  74. Q74 — The figure below depicts an adsorption isotherm of O₂, on charcoal at 90 K.At a pressure 25 torr, only 10% of · Surface Chemistry
  75. Q75 — A one-component system with the associated phase diagram (see the figure) is not possible because · Thermodynamics
  76. Q76 — A phase transition process is always · Thermodynamics
  77. Q77 — The correct statement for any cyclic thermodynamic process is · Thermodynamics
  78. Q78 — The fugacity of a real gas is less than the pressure (P) of an ideal gas at the same temperature (T) only · Thermodynamics
  79. Q79 — The minimum work required by an engine to transfer 5 J of heat from a reservoir at 100 K to one at 300 K is · Thermodynamics

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