4AB › Chemistry PYQ › CSIR-NET › December 2018

1. Q1 — Consider compounds PF₅, SbF₅, PH₃ and SbH₃. The strongest acid and the strongest base among these are · Acids and Bases
2. Q2 — Oxidation of A with HNO₃ / H₂ O provides the product (s), which is (are) A · General Organic Chemistry
3. Q3 — Among the following, the optically active compound is · General Organic Chemistry
4. Q4 — The keto-hexose among the following is · Natural Products
5. Q5 — In the ³¹ P { ¹ H} NMR spectrum of a diamagnetic complex m e r- [M (PR₃)₃ Cl₃] expected number of resonance is · Organic Spectroscopy
6. Q6 — The compound P undergoes a pericyclic reaction under photochemical conditions to give compound Q. In compound · Organic Spectroscopy
7. Q7 — Among the following, reaction(s) which provide(s) I-butene as the major product is (are)- · Reagents, Reaction Mechanisms & Named Reactions
8. Q8 — The mechanism of acid catalysed hydrolysis of benzonitrile involves- · Reagents, Reaction Mechanisms & Named Reactions
9. Q9 — Correct sequence of reagents to be used for the following conversion is- · Reagents, Reaction Mechanisms & Named Reactions
10. Q10 — The correct sequence of reagents to be used for the following conversion is- · Reagents, Reaction Mechanisms & Named Reactions
11. Q11 — Both 1-chloro-1-phenylpropan-2-one and 1-chloro-3-phenylpropan-2-one give same product A when heated in · Reagents, Reaction Mechanisms & Named Reactions
12. Q12 — The structures of products A and B formed in the Edman degradation of dipeptide are- · Reagents, Reaction Mechanisms & Named Reactions
13. Q13 — The correct statement among the following is · Electrochemistry
14. Q14 — The standard free energy of the reaction AgBr(s) → Ag⁺(a q)+Br⁻(a q) Is closest to. [Eo (AgBr / Ag, Br⁻)=0.07 · Electrochemistry
15. Q15 — Conductivities of water and a saturated solution of a sparingly soluble salt AB₂ are 7 and 21 μS m⁻¹ · Electrochemistry
16. Q16 — The equilibrium constant of the following reaction: Sn(s)+Sn⁴⁺(aq) ⇌ 2Sn²⁺(aq) At 300 K is closest to · Electrochemistry
17. Q17 — N₂ O molecule belongs to the point group · Group Theory
18. Q18 — The -orbital πu of ethylene, when placed in the xy-plane with the C=C bond aligned to the x-axis, transforms · Group Theory
19. Q19 — Root mean square speed of the molecules of a perfect gas is proportional to · Gaseous State
20. Q20 — Entropy of a perfect gas is · Gaseous State
21. Q21 — The translational partition function for Ar confined to a volume of 1L at 300K, having thermal wavelength of · Statistical Thermodynamics
22. Q22 — Entropy of a perfect gas is · Thermodynamics
23. Q23 — Consider compounds PF₅, SbF₅, PH₃ and SbH₃. The strongest acid and the strongest base among these are · Acids and Bases
24. Q24 — Match the items of Column I with those of Column II. · Analytical Chemistry
25. Q25 — The chelate rings made by macrocyclic ligand in vitamin B₁₂ are · Bioinorganic Chemistry
26. Q26 — Match the items given below in the three columns: Correct matches: · Bioinorganic Chemistry
27. Q27 — Among SiCl₄, P(O) Cl₃, NF₃, trans- [SnCl₄(py)₂] (py-pyridine), those with zero dipole moment are · Chemical Bonding
28. Q28 — The characters of LUMO and CN⁻and O₂ respectively, are · Chemical Bonding
29. Q29 — Arrange the following molecules in order of increasing fundamental vibrational frequencies · Chemical Bonding
30. Q30 — Consider the species NO, I₂, I₂⁻, Cu²⁺ and VO²⁺. The number of paramagnetic species among them and the EPR · Coordination Chemistry
31. Q31 — The intermediate [Fe(SCN) (H₂ O)₅]²⁺ is detected in the reaction of [Co(NCS) (NH₃)₅]²⁺ with [Fe (H₂ O)₆]²⁺ in · Coordination Chemistry
32. Q32 — For magnesium complex of EDTA²⁻, the number of N -donor and O -donor centers, are respectively. · Coordination Chemistry
33. Q33 — The correct set of electronic configurations for metal ions in octahedral coordination geometry for strong · Coordination Chemistry
34. Q34 — The correct order of intensity of the d-d transitions in the complexes of a 3d-transition metal ion · Coordination Chemistry
35. Q35 — The isomers A and B undergo base hydrolysis by forming a trigonal bipyramidal Intermediate. The correct · Coordination Chemistry
36. Q36 — Consider the two sets of molecules. Set A: [AlF₆]³⁻, [PF₆]⁻, [SF₆] and [SiF₆]²⁻ Set B: [Ba (H₂ O)₆]²⁺, [Ca · Coordination Chemistry
37. Q37 — The ³¹ P{1 H} NMR spectrum of cis- [Pt (PEt₃)₂ Cl₂] (¹⁹⁵ Pt. (33.8% abundance) I=1 / 2; its other isotopes · Inorganic Spectroscopy
38. Q38 — Consider the following statements for [FeO₄]²⁻ (A) It is stable in the pH range 0-14 (B) It is stable in · Inorganic Spectroscopy
39. Q39 — Consider following statements for Eu³⁺ (A) The positions of sharp bands in UV-vis spectra of its complexes · Lanthanides and Actinides
40. Q40 — The reaction of decaborane B₁₀ H₁₄, with acetylene in the presence of Et₂ S gives · Main Group Elements
41. Q41 — In compound N₃ P₃ F₆, the geometry around nitrogen and phosphorus, respectively, are · Main Group Elements
42. Q42 — B₂H₆ reacts with (A) water to give boric acid and H₂ (B) oxygen to give B₂O₃ and H₂ (C) water to give boric · Main Group Elements
43. Q43 — Match the items given in Column-I with those given in Column-II · Main Group Elements
44. Q44 — Match the items given in Column-I with those given in Column-II · Main Group Elements
45. Q45 — The correct order of acceptor ability of the phosphorus ligands is · Organometallic Compounds
46. Q46 — Identify the correct statement(s) for H₃B.CO (A) sp² hybridized orbital of B accepts the lone pair of CO. (B) · Organometallic Compounds
47. Q47 — The product for the reaction given below is IrCl(COE)(PMe₃)₃ (COE = Cyclooctene) + → · Organometallic Compounds
48. Q48 — Match the following complexes with their vCO stretching frequency The correct match is · Organometallic Compounds
49. Q49 — The VCN in [Fe(CN)₆]³⁻(A) and [Fe(CN)₆]⁴⁻(B) and VCO in [Cr(CO)₃ (NH₃)₃](C) and [Cr(CO)₆](D) are compared · Organometallic Compounds
50. Q50 — The cluster type and geometry of the species [Rh₉ P(CO)₂₁]²⁻ are · Organometallic Compounds
51. Q51 — Hydroformylation of 1-propene with [HRh(CO)L₂] leads to linear and branched formylated products. The linear · Organometallic Compounds
52. Q52 — The hydrocarbon having an analogous structure to that of P₄ O₆ is · Organometallic Compounds
53. Q53 — In IR spectra, the stretching frequency (in cm⁻¹) of the carbonyl group of the following compounds is in the · Organic Spectroscopy
54. Q54 — Partial spectroscopic data is given below for an organic compound (i) 4 signals between δ 120 - 150 ~ p p m · Organic Spectroscopy
55. Q55 — The compound P undergoes a pericyclic reaction under photochemical conditions to give compound Q. In compound · Organic Spectroscopy
56. Q56 — Following reaction is an example of · Pericyclic Reactions
57. Q57 — The major product formed in the following photochemical reaction is · Photochemical Reactions
58. Q58 — The b1 u → b 2 g transition in ethylene is (Use Table 1) · Group Theory
59. Q59 — The third and fourth lines in the rotational Raman spectrum of CO are separated by 8 cm⁻¹. The CO bond length · Molecular Spectroscopy
60. Q60 — The dispersity of a polymeric sample is · Polymer Chemistry
61. Q61 — The contour and root mean square length (in nm) of a polymer chain modelled as a random coil, with N=1000 and · Polymer Chemistry
62. Q62 — In a cubic crystal, the (111) and (222) reflections are observed, but not the (001) reflection. The Bravais · Solid State Chemistry
63. Q63 — A metal crystallizes with cubic close-packed structure. The sin ² θ values of Bragg reflections of Miller · Solid State Chemistry
64. Q64 — The free energy [A-A(0)] of a system with 10 non interacting spins (S=I) is · Statistical Thermodynamics
65. Q65 — The translational partition function for Ar confined to a volume of 1 L at 300 K, having thermal wavelength · Statistical Thermodynamics
66. Q66 — For a closed system in the absence of non-PV work, the correct statement is · Thermodynamics
67. Q67 — The volume change in a certain phase transition is 2.0 mL mol⁻¹ at the transition point. From this, we may · Thermodynamics
68. Q68 — Consider a phase transition between two incompressible phases. The correct statement among the following is · Thermodynamics

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