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 · Acid and Bases
2. Q2 — Oxidation of A with mathrmHNO₃/H₂O 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 ³¹P{¹H} NMR spectrum of a diamagnetic complex mer–[M(PR₃)₃Cl₃] expected number of resonance is · Organic Spectroscopy
6. Q9 — Correct sequence of reagents to be used for the following conversion is- · Reagents, Reaction Mechanisms & Named Reactions
7. Q10 — The correct sequence of reagents to be used for the following conversion is- · Reagents, Reaction Mechanisms & Named Reactions
8. 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
9. Q13 — The correct statement among the following is · Electrochemistry
10. Q14 — The standard free energy of the reaction AgBr(s) → Ag⁺(aq) + Br⁻(aq) Is closest to. [Eo(AgBr/Ag, Br⁻) = 0.07 · Electrochemistry
11. Q15 — Conductivities of water and a saturated solution of a sparingly soluble salt AB₂ are 7 and 21 μS m⁻¹ · Electrochemistry
12. Q16 — The equilibrium constant of the following reaction: Sn(s) + Sn⁴⁺(aq) ⇌ 2Sn²⁺(aq) At 300 K is closest to · Electrochemistry
13. Q19 — Root mean square speed of the molecules of a perfect gas is proportional to · Gaseous State
14. Q20 — Entropy of a perfect gas is · Gaseous State
15. Q21 — The translational partition function for Ar confined to a volume of 1L at 300K, having thermal wavelength of · Statistical Thermodynamics
16. Q22 — Entropy of a perfect gas is · Thermodynamics
17. Q23 — Consider compounds PF₅, SbF₅, PH₃ and SbH₃. The strongest acid and the strongest base among these are · Acid and Bases
18. Q25 — The chelate rings made by macrocyclic ligand in vitamin B₁₂ are · Bioinorganic Chemistry
19. Q26 — Match the items given below in the three columns: Correct matches: · Bioinorganic Chemistry
20. Q27 — Among SiCl₄, P(O) Cl₃, NF₃, trans- [SnCl₄(py)₂] (py-pyridine), those with zero dipole moment are · Chemical Bonding
21. Q28 — The characters of LUMO and CN⁻and O₂ respectively, are · Chemical Bonding
22. Q29 — Arrange the following molecules in order of increasing fundamental vibrational frequencies · Chemical Bonding
23. Q30 — Consider the species NO, I₂, I₂⁻, Cu²⁺ and VO²⁺. The number of paramagnetic species among them and the EPR · Coordination Chemistry
24. 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
25. Q32 — For magnesium complex of EDTA²⁻, the number of N-donor and O-donor centers, are respectively. · Coordination Chemistry
26. Q33 — The correct set of electronic configurations for metal ions in octahedral coordination geometry for strong · Coordination Chemistry
27. Q34 — The correct order of intensity of the d-d transitions in the complexes of a 3d-transition metal ion · Coordination Chemistry
28. 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
29. 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
30. Q39 — Consider following statements for Eu³⁺ (A) The positions of sharp bands in UV-vis spectra of its complexes · Lanthanides and Actinides
31. Q40 — The reaction of decaborane B₁₀ H₁₄, with acetylene in the presence of Et₂ S gives · Main Group Elements
32. Q41 — In compound N₃ P₃ F₆, the geometry around nitrogen and phosphorus, respectively, are · Main Group Elements
33. Q45 — The correct order of acceptor ability of the phosphorus ligands is · Organometallic Compounds
34. Q46 — Identify the correct statement(s) for H₃B.CO (A) sp² hybridized orbital of B accepts the lone pair of CO. (B) · Organometallic Compounds
35. Q48 — Match the following complexes with their vCO stretching frequency The correct match is · Organometallic Compounds
36. 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
37. Q50 — The cluster type and geometry of the species [Rh₉ P(CO)₂₁]²⁻ are · Organometallic Compounds
38. Q52 — The hydrocarbon having an analogous structure to that of P₄ O₆ is · Organometallic Compounds
39. Q56 — Following reaction is an example of · Pericyclic Reactions
40. Q60 — The dispersity of a polymeric sample is · Polymer Chemistry
41. Q62 — In a cubic crystal, the (111) and (222) reflections are observed, but not the (001) reflection. The Bravais · Solid State Chemistry
42. Q63 — A metal crystallizes with cubic close-packed structure. The sin ²θ values of Bragg reflections of Miller · Solid State Chemistry
43. Q64 — The free energy [A-A(0)] of a system with 10 non interacting spins (S=I) is · Statistical Thermodynamics
44. Q65 — The translational partition function for Ar confined to a volume of 1 L at 300 K, having thermal wavelength · Statistical Thermodynamics
45. Q66 — For a closed system in the absence of non-PV work, the correct statement is · Thermodynamics
46. Q67 — The volume change in a certain phase transition is 2.0 mL mol⁻¹ at the transition point. From this, we may · Thermodynamics
47. Q68 — Consider a phase transition between two incompressible phases. The correct statement among the following is · Thermodynamics

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