4AB › Chemistry PYQ › CSIR-NET › December 2011

1. Q1 — Match list I (compounds) with list II (structures), and select the correct answer using the codes given below. · Chemical Bonding
2. Q2 — Match the amino acids with their structures: · Natural Products
3. Q3 — The reaction given below proceeds through · Reagents, Reaction Mechanisms & Named Reactions
4. Q4 — The major product formed in the following reaction is · Reagents, Reaction Mechanisms & Named Reactions
5. Q5 — In the following reaction, the product formed and the mechanism involved is · Reagents, Reaction Mechanisms & Named Reactions
6. Q6 — The major products A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
7. Q7 — The major products A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
8. Q8 — The major products A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
9. Q9 — The major products A and B in the following reaction sequence are · Reagents, Reaction Mechanisms & Named Reactions
10. Q10 — The term symbol for the ground state of nitrogen atoms is · Atomic and Molecular Term Symbol
11. Q11 — Observe the following electronic transition of a diatomic molecule. (A) ¹Σg⁺ → ³Σg⁺ (B) ¹Σu⁺ → ¹Σg⁺ (C) ¹Δu → · Atomic and Molecular Term Symbol
12. Q12 — The concentration of a reactant undergoing decomposition was 0.1, 0.08 and 0.067 mol L⁻¹ after 1.0, 2.0 and · Chemical Kinetics
13. Q13 — At any temperature for the following reaction (D and T are deuterium and tritium respectively) correct · Chemical Kinetics
14. Q14 — An example of a relaxation method of measuring rates is: · Chemical Kinetics
15. Q15 — The half life of a zero order reaction (A → P) is given by (k= rate constant) : · Chemical Kinetics
16. 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
17. Q17 — "Phosphorescence" is represented as · Chemical Kinetics
18. Q18 — Using cuvettes of 0.5 cm path length, a 10⁻⁴ M solution of a chromophore shows 50% transmittance at certain · Chemical Kinetics
19. Q19 — The character table of the C2v point group is given below: The two functions φ=p₁+2p₂+2p₃+p₄ and · Group Theory
20. Q20 — Two α particles having speeds S₁ and S₂ have kinetic energies 1 and 2 MeV respectively; the relationship · Gaseous State
21. Q21 — The Q band in the vibrational spectrum of acetylene is observed in the · Molecular Spectroscopy
22. Q22 — The sodium D lines are due to ²P1/2 → ²S1/2(Δ E₁) and ²P1/2 → ²S1/2(Δ E₂) transitions. The splitting due to · Molecular Spectroscopy
23. Q23 — The osmotic pressure (π) of a polymer sample at different concentrations (c) was measured at T(K). A plot of · Polymer Chemistry
24. Q24 — The addition polymerization of M (monomer) involves the following stages: (I=initiator, R=free radical) I k₁ · Polymer Chemistry
25. Q25 — If θr denotes the characteristic temperatures of rotation, then the magnitude of [θr, (H₂). θr (D₂)] / [θr(H · Statistical Thermodynamics
26. Q26 — Two α particles having speeds S₁ and S₂ have kinetic 1 and 2 MeV respectively; the relationship between S₁ · Statistical Thermodynamics
27. Q27 — Flocculation value of K₂SO₄ is much less than that of KBr for Sol A. Floccultion value of CaCl₂ is much less · Surface Chemistry
28. Q28 — The Langmuir adsorption isotherm is given by θ=kp/(1+kp), where P is the pressure of the adsorabate gas. The · Surface Chemistry
29. 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
30. 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
31. Q31 — For the reaction H₂ O(g)+C (graphite) ⇌ CO(g)+H₂ O(g), the variation of energy parameter Δ G⁰, Δ H⁰ and T Δ · Thermodynamics
32. Q32 — The correct order of acidity among the following species is · Acids and Bases
33. Q33 — Superoxide dismutase contains the metal ions · Bioinorganic Chemistry
34. Q34 — Among the following drugs, the anticancer agents is: · Bioinorganic Chemistry
35. Q35 — The reduction of nitrogen to ammonia, carried out by the enzyme nitrogenase, needs, · Bioinorganic Chemistry
36. Q36 — A metal ion that replace manganese (II) ion in mangano-proteins without changing its function, is · Bioinorganic Chemistry
37. Q37 — In the bacterial rubredoxin, the number of iron atoms, sulfur bridges and cysteine ligands are Fe atom Sulfur · Bioinorganic Chemistry
38. Q38 — The number of anti-bonding electrons in NO and CO according to MO theory are respectively. · Chemical Bonding
39. Q39 — Among the following pairs, those in which both species have similar structures are: (A) N₃⁻, XeF₂ (B) · Chemical Bonding
40. Q40 — The term symbol for the ground state of nitrogen atoms is · Coordination Chemistry
41. Q41 — The complex that absorbs light of shortest wavelength is · Coordination Chemistry
42. Q42 — Green coloured Ni(PPh₂Et)₂Br₂, has a magnetic moment of 3.20 B.M. The geometry and the number of isomers · Coordination Chemistry
43. Q43 — Observe the following electronic transition of a diatomic molecule. (A) ¹Σg⁺ → ³Σg⁺ (B) ¹Σu⁺ → ¹Σg⁺ (C) ¹Δu → · Coordination Chemistry
44. Q44 — The electronic spectrum of [CrF₆]³⁻ shows three bands at 14,900 cm⁻¹, 22400 cm⁻¹ and 34,800 cm⁻¹. The value · Coordination Chemistry
45. Q45 — A true statement about base hydrolysis of [Co (NH₃)₅ Cl]²⁺ is: · Coordination Chemistry
46. Q46 — The correct order of d-orbital splitting in a trigonal bipyramidal geometry is: · Coordination Chemistry
47. Q47 — For the following outer sphere electron transfer reactions. [Co (NH₃)₆]²⁺+ [Co* (NH₃)₆]³⁺ → [Co (NH₃)₆]³⁺+ · Coordination Chemistry
48. Q48 — The coordination number and geometry of cerium in [Ce (NO₃)₆]²⁻ are respectively, · Coordination Chemistry
49. Q49 — The electric dipole allowed transition in a d² atomic system is · Coordination Chemistry
50. Q50 — In the ¹⁹ F NMR spectrum of PF₅, the number of signals and multiplicity, at room temperature are · Inorganic Spectroscopy
51. Q51 — In ⁵⁷Fe Mossbauer experiment, source of 14.4 keV (equivalent to 3.48 × 10¹² MHz) is moved towards absorber at · Inorganic Spectroscopy
52. Q52 — The actual magnetic moment shows a large deviation from the spin-only formula in the case of · Lanthanides and Actinides
53. Q53 — The correct statement regarding closo-{BnHn} species is: · Main Group Elements
54. Q54 — Lewis acidity of BCl₃, BPh₃ and BMe₃ with respect to pyridine follows the order · Main Group Elements
55. Q55 — Among the following pairs (1) oxygen-sulfur (2) nitrogen-phosphorus (3) phosphorus arsenic (4) · Main Group Elements
56. Q56 — The reaction between NH₄ Br and Na metal in liquid ammonia (solvent) results in the products · Main Group Elements
57. Q57 — The material that exhibits the highest electrical conductivity among the following sulfur - nitrogen · Main Group Elements
58. Q58 — The final product (s) of the reaction P(OR)₃+R′ X is/are · Main Group Elements
59. Q59 — A Sodalite cage in zeolites is · Main Group Elements
60. Q60 — The styx code of B₄ H₁₀ is: · Main Group Elements
61. Q61 — Bayer's process involves. · Main Group Elements
62. Q62 — For the nuclear reactions. (A) ₄⁸Be → 2 ₂⁴He (B) ₃₆⁸⁰Kr → 2 ₁₈⁴⁰Ar (Given masses: ⁸Be = 8.005300, ⁴He = · Nuclear Chemistry
63. Q63 — Among the metals Mn, Fe, Co and Ni, the ones those would react in its native form directly with CO giving · Organometallic Compounds
64. Q64 — The correct combination of metal, number of carbonyl ligands and the charge for a metal carbonyl complex · Organometallic Compounds
65. Q65 — The stable cyclopentadienyl complex of beryllium is · Organometallic Compounds
66. Q66 — Reaction of Fe(CO)₅ with OH leads to complex A which on oxidation with MnO₂ gives B. Compounds A and B · Organometallic Compounds
67. Q67 — The number of metal-metal bonds in the dimers, [CpFe(CO)(NO)]₂ and [CpMo(CO)₃]₂ respectively, are · Organometallic Compounds
68. Q68 — In the trans- PtCl₂ L(CO) complex, the CO stretching frequency for L=NH₃, pyridine, NMe₃ decreases in the · Organometallic Compounds
69. Q69 — The catalyst involved in carrying out the metathesis of 1-butene to give ethylene and 3-hexene is: · Organometallic Compounds
70. Q70 — The greater stability of ((CH₃)₃ C-CH₂ ⁻)₄ Ti(A) compared to that of ((CH₃)₂ CH-CH₂ ⁻)₄ Ti(B) is due to · Organometallic Compounds
71. Q71 — A compound A having the composition FeC₉H₈O₃ shows one signal at 2.5 ppm and another one around · Organometallic Compounds
72. Q72 — In the mass spectrum of dodecahedron (C₂₀ H₂₀), approximate ratio of the peaks at m / z=260 and 261 is · Organic Spectroscopy
73. 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
74. Q74 — An organic compound having molecular formula C ₁₅ H₁₄ O exhibited the following ¹ H and ¹³ C NMR spectral · Organic Spectroscopy
75. Q75 — Appropriate ¹ H ~ NMR chemical shifts (δ) for the protons A-D for the following compound are · Organic Spectroscopy
76. Q76 — In the following concerted reaction, the product is formed by a Δ · Pericyclic Reactions
77. Q77 — The product formed and the process involved in the following reaction are · Pericyclic Reactions
78. Q78 — Match the following starting compounds with corresponding products in photochemical reactions: Starting · Photochemical Reactions
79. Q79 — Two α particles having speeds S₁ and S₂ have kinetic energies 1 and 2 MeV respectively; the relationship · Atomic and Molecular Term Symbol
80. Q80 — The overall rate of the following complex reaction, 2 A k₁k₂⇌ A₂ (fast equilibrium) A+B k₂⇌ C (fast · Chemical Kinetics
81. Q81 — The concentration of a reactant undergoing decomposition was 0.1, 0.08 and 0.067 mol L⁻¹ after 1.0, 2.0 and · Chemical Kinetics
82. Q82 — An example of a relaxation method of measuring rates is: · Chemical Kinetics
83. Q83 — The decomposition of gaseous acetaldehyde at T(K) follows second order kinetics. The half-life of this · Chemical Kinetics
84. Q84 — For an enzyme catalyzed reaction, a Lineweaver-Burk plot gave the following data: slope =40 s, intercept =4 · Chemical Kinetics
85. Q85 — Observe the following aqueous solutions of same compound. All the measurements are made at same wavelength · Chemical Kinetics
86. Q86 — The rate law for one of the mechanism of the pyrolysis of CH₃ CHO at 520° C and 0.2 bar is Rate =- |k₂ · Chemical Kinetics
87. Q87 — In the Michaelis-Menten mechanism for enzyme kinetics, the expression obtained is: v/([E]₀[S])=1.4 × · Chemical Kinetics
88. Q88 — One of the assumptions made in the conventional activated complex theory is: · Chemical Kinetics
89. Q89 — The quantitative determination of N₂ H₄ with KIO₃ proceeds in a mixture of H₂ O / CCl₄ as Follows N₂ · Chemical Kinetics
90. Q90 — In least square fitting of a data set {Xi Yi} to the equation Y= A.X, the regression coefficient (A) is · Data Analysis
91. Q91 — Which one of the following conductometric titrations will show a linear increase of the conductance with · Electrochemistry
92. Q92 — For a potentiometric titration, in the curve of emf (E) vs volume (V) of the titrant added, the equivalence · Electrochemistry
93. Q93 — The standrad electrode potentials (E°) of Fe³⁺ / Fe²⁺ and Fe²⁺ / Fe electrodes are +0.77 V and -0.44 V · Electrochemistry
94. Q94 — The overall reaction for the passage of 1.0 faraday of charge in the following cell Ag(s)-AgCl(s) |KCl (a₁) | · Electrochemistry
95. Q95 — The molecule diborane belongs to the symmetry point group · Group Theory
96. Q96 — The irreducible representations of C2 h are Ag, Bg, Au and Bu. The Raman active modes of trans- 1, 3 · Group Theory
97. Q97 — The symmetry point group of the most stable geometry of the following molecule Cl(H) C=C=C(H) Cl is · Group Theory
98. Q98 — The point group obtained by adding symmetry operation σh to the point group C₄ is · Group Theory
99. Q99 — The character table for the D₄ point group is provided below: For this point group, the correct statement · Group Theory
100. Q100 — The character table of C3 v point group is provided below, along with an additional reducible representation · Group Theory
101. Q101 — The molecule that possesses symmetry S₄ element is · Group Theory
102. Q102 — For H₂O molecule, the electronic transition from the ground state to an excited state of B₁ symmetry is · Group Theory
103. Q103 — The pair of symmetry point groups that are associated with only polar molecules is · Group Theory
104. Q104 — The uncertainty in the NMR frequency of a compound in liquid state (relaxation time =1 s) is 0.1 Hz. The · Molecular Spectroscopy
105. Q105 — The NMR spectrum of AX, exhibits lines at δ=2.1 and 2.3 ppm (for X type protons) and = 4.1, 4.3, 4.5 and 4.7 · Molecular Spectroscopy
106. Q106 — The osmotic pressure (π) of a polymer sample at different concentrations (c) was measured at T(K). A plot of · Polymer Chemistry
107. Q107 — The addition polymerization of M (monomer) involves the following stages: (I= initiator, R= free radical) The · Polymer Chemistry
108. Q108 — Identify which of the following operators is not hermitian? · Quantum Chemistry
109. 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
110. Q110 — For the eigen states of the hydrogen atom, which of the following relations between the expectation value of · Quantum Chemistry
111. Q111 — Which of the following is true for the radial part of the hydrogen atom wave functions Rn 1(r) (n principal · Quantum Chemistry
112. Q112 — For non-degenerate perturbation theory for ground state, with E₀⁽⁰⁾ as zeroth order energy, E₀⁽¹⁾ as the · Quantum Chemistry
113. Q113 — An excited triplet state wave function of hydrogen molecule with the electronic configuration σg¹ σu¹ has the · Quantum Chemistry
114. Q114 — The value of d₁₁₁ in a cubic crystal is 325.6 pm. The value of d₃₃₃ is · Solid State Chemistry
115. 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
116. Q116 — PA and PB denote the populations of two energy states EA and EB and EA>EB, The correct statement when the · Statistical Thermodynamics
117. Q117 — A system consisting of 4 identical and distinguishable particles, each possessing three available states of · Statistical Thermodynamics
118. Q118 — Flocculation value of K₂ SO₄ is much less than that of KBr for Sol A. Floccultion value of CaCl₂ is much less · Surface Chemistry
119. Q119 — The Langmuir adsorption isotherm is given by kp/(1+kp), where P is the pressure of the adsorabate gas. The · Surface Chemistry
120. Q120 — Hydrogen is adsorbed on many metal surfaces by dissociation (S represents a surface site)- If the pressure of · Surface Chemistry
121. Q121 — For a system of constant composition, the pressure (P) is given by. · Thermodynamics
122. 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
123. 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
124. Q124 — For the liquid ⇌ vapour equilibrium of a substance dP / dT at 1 bar and 400 K is 8 × 10⁻³ bar K⁻¹. If the · Thermodynamics

← June 2011 · June 2012 → · All CSIR-NET papers