4AB › Chemistry PYQ › CSIR NET › December 2011

1. Q10 — The term symbol for the ground state of nitrogen atoms is · Atomic and Molecular Term Symbol
2. Q11 — Observe the following electronic transition of a diatomic molecule. (A) ¹Σg⁺ → ³Σg⁺ (B) ¹Σu⁺ → ¹Σg⁺ (C) ¹Δu → · Atomic and Molecular Term Symbol
3. Q13 — At any temperature for the following reaction (D and T are deuterium and tritium respectively) correct · Chemical Kinetics
4. Q14 — An example of a relaxation method of measuring rates is: · Chemical Kinetics
5. Q15 — The half life of a zero order reaction (A → P) is given by (k= rate constant) : · Chemical Kinetics
6. Q16 — For a reaction, the rate constant k at 27°C was found to be k = 5.4 × 10¹¹ e⁻⁵⁰. The activation energy of the · Chemical Kinetics
7. Q17 — "Phosphorescence" is represented as · Chemical Kinetics
8. Q18 — Using cuvettes of 0.5 cm path length, a 10⁻⁴ M solution of a chromophore shows 50% transmittance at certain · Chemical Kinetics
9. Q20 — Two α particles having speeds S₁ and S₂ have kinetic energies 1 and 2 MeV respectively; the relationship · Gaseous State
10. Q21 — The Q band in the vibrational spectrum of acetylene is observed in the · Molecular Spectroscopy
11. Q23 — The osmotic pressure (π) of a polymer sample at different concentrations (c) was measured at T(K). A plot of · Polymer Chemistry
12. Q29 — 1 mol of CO₂, 1 mol of N₂ and 2 mol of O₂ were mixed at 300 K. The entropy of mixing is · Thermodynamics
13. Q30 — For the liquid ⇌ vapour equilibrium of a substance d P/d T at 1 bar and 400 K is 8 × 10⁻³ bar K⁻¹. If the · Thermodynamics
14. Q40 — The term symbol for the ground state of nitrogen atoms is · Coordination Chemistry
15. Q73 — An organic compound (MF=C ₈ H₁₀ O) exhibited the following ¹ H NMR spectral data: δ 2.5 (3 H, s), 3.8(3 H · Organic Spectroscopy
16. Q79 — Two α particles having speeds S₁ and S₂ have kinetic energies 1 and 2 MeV respectively; the relationship · Atomic and Molecular Term Symbol
17. Q90 — In least square fitting of a data set {Xi Yi} to the equation Y= A.X, the regression coefficient (A) is · Data Analysis
18. Q94 — The overall reaction for the passage of 1.0 faraday of charge in the following cell Ag(s)-AgCl(s) |KCl (a₁) | · Electrochemistry
19. Q95 — The molecule diborane belongs to the symmetry point group · Group Theory
20. Q96 — The irreducible representations of C2 h are Ag, Bg, Au and Bu. The Raman active modes of trans- 1, 3 · Group Theory
21. Q97 — The symmetry point group of the most stable geometry of the following molecule Cl(H) C=C=C(H) Cl is · Group Theory
22. Q101 — The molecule that possesses symmetry S₄ element is · Group Theory
23. Q102 — For H₂O molecule, the electronic transition from the ground state to an excited state of B₁ symmetry is · Group Theory
24. Q104 — The uncertainty in the NMR frequency of a compound in liquid state (relaxation time =1 s) is 0.1 Hz. The · Molecular Spectroscopy
25. Q106 — The osmotic pressure (π) of a polymer sample at different concentrations (c) was measured at T(K). A plot of · Polymer Chemistry
26. Q108 — Identify which of the following operators is not hermitian? · Quantum Chemistry
27. Q109 — A particle is constrained in a one dimensional box of length 2 a with potential V(x)=∞; x<-a, x>a and · Quantum Chemistry
28. Q110 — For the eigen states of the hydrogen atom, which of the following relations between the expectation value of · Quantum Chemistry
29. Q112 — For non-degenerate perturbation theory for ground state, with E₀⁽⁰⁾ as zeroth order energy, E₀⁽¹⁾ as the · Quantum Chemistry
30. Q113 — An excited triplet state wave function of hydrogen molecule with the electronic configuration σg¹ σu¹ has the · Quantum Chemistry
31. Q114 — The value of d₁₁₁ in a cubic crystal is 325.6 pm. The value of d₃₃₃ is · Solid State Chemistry
32. Q115 — Consider a n-type semiconductor whose Ev=0, EC=2.0 eV and ED=1.98 eV. The correct statement among the · Solid State Chemistry
33. Q116 — PA and PB denote the populations of two energy states EA and EB and EA>EB, The correct statement when the · Statistical Thermodynamics
34. Q117 — A system consisting of 4 identical and distinguishable particles, each possessing three available states of · Statistical Thermodynamics
35. Q121 — For a system of constant composition, the pressure (P) is given by. · Thermodynamics
36. Q122 — For the reaction C₂ H₄(g)+3 O₂(g) → 2 CO₂(g)+2 H₂ O(l), the value of Δ H-Δ U (in kJ) at 300 K and 1bar is · Thermodynamics
37. Q123 — 1 mol of CO 2,1 mol of N 2 and 2 mol of O 2 were mixed at 300 K. The entropy of mixing is · Thermodynamics
38. Q127 — The carbon-14 activity of an old wood sample is found to be 14.2 disintegrations min⁻¹ g⁻¹. Calculate age of · Chemical Kinetics

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