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Question paper · UP PGT

UP PGT 2021 — Chemistry (Series A)

17 or 18 August 2021125 questions+3.4 for a correct answer, −0 for a wrong one

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Questions from the U.P. Secondary Education Services Selection Board’s paper of 17 or 18 August 2021. Each question’s answer is under it, hidden until you open it, and the full answer key is at the end. Take the paper as a timed practice test to be scored.

The official booklet is a scan with no text, so ExamBharo typed this paper from it by hand. A typing slip is possible; report one through the contact page.

The board deleted questions 6, 29 and 96 in its final answer key: shown here, with no answer, and not counted in the score.

Chemistry

1. The work done, in dissolving one mole of zinc in an aqueous HCl in open beaker at 27°C is
- (a) 8.314 kJ
- (b) 2.494 kJ
- (c) 24.94 J
- (d) 8.314 J
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Answer: (b)
2. The equation that represents the water gas shift reaction is
- (a) CH₄(g) + H₂O(g) —(1270K, Ni)→ CO(g) + 3H₂(g)
- (b) 2C(s) + O₂(g) + 4N₂(g) —(1273K)→ 2CO(g) + 4N₂(g)
- (c) C(s) + H₂O(g) —(1270K)→ CO(g) + H₂(g)
- (d) CO(g) + H₂O(g) —(673K, Catalyst)→ CO₂(g) + H₂(g)
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Answer: (d)
3. The synthesis of aromatic hydrocarbons can not be done by the process
- (a) Fittig reaction
- (b) Wurtz-Fittig reaction
- (c) Wurtz reaction
- (d) Friedal-Craft alkylation
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Answer: (c)
4. The aqueous solution of a salt of one of the given lanthanide ions is used as a volumetric standard in redox reactions. Identify the lanthanide ion.
- (a) Ce⁴⁺
- (b) Pr⁴⁺
- (c) Tb⁴⁺
- (d) Dy⁴⁺
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Answer: (a)
5. A Cobalt (II) complex is expected to have lowest value of magnetic moment when the ligand field in it is
- (a) a weak octahedral field
- (b) a strong octahedral field
- (c) a weak tetrahedral field
- (d) a strong tetrahedral field
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Answer: (b)
6. “Photochemical equivalence can only be applied to primary processes”. This statement was given by
- (a) Stark
- (b) Bodenstein
- (c) Einstein
- (d) Grotthus
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Answer: —
7. Which one of the following has the highest melting point ?
- (a) Tartaric acid
- (b) Aminoacetic acid
- (c) Succinic acid
- (d) Oxalic acid
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Answer: (b)
8. Ratio of molar heat capacities of diatomic gas molecules is
- (a) 1.15
- (b) 1.16
- (c) 1.30
- (d) 1.67
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Answer: (c)
9. The unit of specific conductance in SI system is
- (a) S cm⁻¹
- (b) ohm⁻¹ cm⁻¹
- (c) S m⁻¹
- (d) ohm⁻¹ m⁻¹
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Answer: (c)
10. Among the following complexes most stable species are
- (a) [AgI₂]⁻, [CoF₆]³⁻, [Co(NCS)₄]²⁻
- (b) [AgF₂]⁻, [CoI₆]³⁻, [Pd(NCS)₄]²⁻
- (c) [Co(CN)₅F]³⁻, [Co(NCS)₄]²⁻, [Pd(SCN)₄]²⁻
- (d) [Co(NH₃)₅F]²⁺, [CoF₆]³⁻, [Co(SCN)₄]²⁻
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Answer: (a)
11. In the three heterocyclic compounds, for example, furan, pyrrole and thiophene, the order of aromaticity is
- (a) Thiophene > pyrrole > furan
- (b) Pyrrole > thiophene > furan
- (c) Pyrrole > furan > thiophene
- (d) Furan > pyrrole > thiophene
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Answer: (a)
12. Why presence of oxygen decreases the rate of chlorination of methane in the presence of sunlight ?
- (a) CH₃ − Ȯ is formed
- (b) CH₃ − O − Cl is formed
- (c) CH₃ − O − Ȯ is formed
- (d) CH₃ − O − ĊH₂ is formed
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Answer: (c)
13. The glucose molecule reacts with X molecules of phenyl hydrazine to yield osazone. The value of X is
- (a) 4
- (b) 2
- (c) 3
- (d) 1
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Answer: (c)
14. Which one of the following will have the highest coagulating power for As₂S₃ colloid ?
- (a) PO₄³⁻
- (b) Al³⁺
- (c) SO₄²⁻
- (d) Na⁺
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Answer: (b)
15. [Re₂Cl₈]²⁻ possess
- (a) Single bond between two Re
- (b) Double bond between two Re
- (c) Triple bond between two Re
- (d) Quadruple bond between two Re
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Answer: (d)
16. Which complex amongst the following is stable according to HSAB principle ?
- (a) [AgF₂]⁻
- (b) [Cd(NH₃)₄]²⁺
- (c) [CoI₆]³⁻
- (d) [AgI₂]⁻
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Answer: (d)
17. The collision theory of reaction rates is only valid for
- (a) Complex reactions
- (b) Parallel reactions
- (c) Simple bimolecular reactions
- (d) All the reactions
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Answer: (c)
18. Which ion possess sp³d² hybridisation ?
- (a) [IF₆]⁻
- (b) [ICl₄]⁻
- (c) [BrF₂]⁻
- (d) [ICl₂]⁻
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Answer: (b)
19. The outcome of Carnot’s theorem is the concept of the following
- (a) Enthalpy
- (b) Internal energy
- (c) Free energy
- (d) Entropy
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Answer: (d)
20. Surface area of an adsorbent is calculated by using following equation
- (a) Freundlich equation
- (b) Langmuir equation
- (c) B.E.T. equation
- (d) McBain equation
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Answer: (c)
21. Among the chlorides of alkaline earths given below, the lowest melting point as per Fajan’s rules will be shown by
- (a) CaCl₂
- (b) BaCl₂
- (c) MgCl₂
- (d) SrCl₂
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Answer: (c)
22. Who first used phenyl isothiocyanate for the synthesis of a peptide ?
- (a) Frederic Sanger
- (b) Max Bergmann
- (c) Leonidas Zervas
- (d) Fehr Edman
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Answer: (d)
23. The most strong acid is
- (a)
- (b)
- (c)
- (d)
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Answer: (c)
24. Which of the following compounds has a cylindrical symmetry ?
- (a) Ethane
- (b) Ethyne
- (c) Methane
- (d) Ethene
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Answer: (b)
25. First law of thermodynamics is based on
- (a) Theory
- (b) Derivation
- (c) Quantum mechanics
- (d) Experimental facts
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Answer: (d)
26. 4PCl₅ + 4NH₃ → ? The aforementioned reaction yields
- (a) (PNCl₂)₃ + 9HCl
- (b) (PNCl₂)₄ + 12HCl
- (c) (PNCl₂)₃ + 12HCl
- (d) (PNCl₂)₄ + 9HCl
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Answer: (b)
27. Concentrations of following aqueous solutions are equal. Select the solution with highest B.P.
- (a) Potassium sulfate
- (b) Potassium chloride
- (c) Potassium phosphate
- (d) Urea
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Answer: (c)
28. In orthoboric acid, H₃BO₃, the trigonal BO₃³⁻ units are bonded together through
- (a) Electrovalent bond
- (b) Covalent bond
- (c) Hydrogen bonds into two dimensional sheet
- (d) Coordinate bonds
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Answer: (c)
29. The expression for Joul-Thomson coefficient μ_JT is
- (a) μ_JT = −(∂H/∂P)_T / C_V
- (b) μ_JT = −(∂E/∂P)_T / C_V
- (c) μ_JT = −(∂E/∂V)_T / C_P
- (d) μ_JT = −(∂H/∂V)_T / C_P
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Answer: —
30. With Fenton’s reagent t-butanol forms
- (a) CH₃CH₂CH₂CHO
- (b) (CH₃)₂C(OH)CH₂CH₂C(OH)(CH₃)₂
- (c) CH₃CH₂CH₂COOH
- (d) (CH₃)₂C(OH)CH═CHC(OH)(CH₃)₂
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Answer: (b)
31. Hydrolysis of which of the following compounds forms benzaldehyde ?
- (a) Benzyl chloride
- (b) Benzal chloride
- (c) Benzotrichloride
- (d) Benzonitrile
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Answer: (b)
32. Number of Cr−O bonds in Chromium (II) acetate hydrate are
- (a) 2
- (b) 9
- (c) 10
- (d) 8
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Answer: (c)
33. Which of the following relation holds true for the reaction ? CO(g) + (1/2)O₂(g) → CO₂(g)
- (a) ΔH = ΔE
- (b) ΔH = ΔE + RT
- (c) ΔH = ΔE + (1/2)RT
- (d) ΔH = ΔE − (1/2)RT
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Answer: (d)
34. The complex M(NH₃)₂Cl₂ does not show geometrical isomerism, if the central metal ion, M is
- (a) Ni²⁺
- (b) Cu²⁺
- (c) Zn²⁺
- (d) Pt²⁺
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Answer: (c)
35. The Miller Indices of a crystal plane which cut through the crystal axes at (2a, 3b, c) is
- (a) (231)
- (b) (312)
- (c) (623)
- (d) (326)
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Answer: (d)
36. In the following compounds the order of acidity is
- (a) III > IV > I > II
- (b) I > IV > III > II
- (c) II > I > III > IV
- (d) IV > III > I > II
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Answer: (d)
37. The reaction C₆H₅CH₃ + 2CrO₂Cl₂ → C₆H₅CH(OCrCl₂OH)₂ —(H₂O)→ C₆H₅CHO + 2CrCl₂(OH)₂ is called
- (a) Leukart reaction
- (b) Dakin reaction
- (c) Etard reaction
- (d) Strecker reaction
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Answer: (c)
38. The chromates are oxidising while molybdate and tungstates are non-oxidising because
- (a) Cr is unstable in all its oxidation states
- (b) Mo and W are stable in their higher oxidation states
- (c) Mo and W are stable in their lower oxidation states
- (d) Cr is stable in its higher oxidation state
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Answer: (b)
39. In [UO₂(NO₃)₃]⁻, the coordination number and geometry are
- (a) 8 and hexagonal bipyramidal
- (b) 8 and square antiprism
- (c) 5 and square pyramidal
- (d) 5 and trigonal bipyramidal
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Answer: (a)
40. If the half-life for first order reaction A → Products is 200 seconds, the value of rate constant will be
- (a) 3.46×10⁻²s⁻¹
- (b) 3.46×10⁻³s⁻¹
- (c) 3.46×10⁻⁴s⁻¹
- (d) 3.46×10⁻⁵s⁻¹
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Answer: (b)
41. In which of the following d-orbital resonance is possible ?
- (a) CF₃⁻
- (b) CCl₃⁻
- (c) CH₃⁻
- (d) CHF₂⁻
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Answer: (b)
42. Nitrogenase enzyme involves which of the following as co-factor ?
- (a) Mg²⁺
- (b) Mo
- (c) Cu²⁺
- (d) Zn²⁺
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Answer: (b)
43. If the standard oxidation potential of zinc electrode is 0.763 volt at 25°C, the electrode potential of half cell consisting of zinc electrode dipped in 0.01M ZnSO₄ solution at 25°C will be
- (a) 0.822 volt
- (b) 8.22 volt
- (c) 82.2 volt
- (d) 0.0591 volt
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Answer: (a)
44. Identify [X] in the following reaction.
- (a)
- (b)
- (c)
- (d)
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Answer: (d)
45. The correct set of magic numbers for nuclear shells is
- (a) 2, 8, 20, 52, ....
- (b) 2, 8, 16, 32, ....
- (c) 2, 8, 32, 64, ....
- (d) 2, 8, 26, 80, ....
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Answer: (a)
46. The number of triple points in phase diagram of sulfur are
- (a) Six
- (b) Three
- (c) Two
- (d) One
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Answer: (b)
47. The ground state electronic configurations of the central metal atom in some octahedral complexes are given below. In which case the electronic transition is forbidden as per the spin selection rule ?
- (a) t₂g⁶ e_g¹
- (b) t₂g³ e_g⁰
- (c) t₂g⁶ e_g²
- (d) t₂g⁶ e_g³
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Answer: (a)
48. Cl₂ —(Cold and dil. NaOH)→ (A) + NaCl + H₂O Cl₂ —(Hot and Conc. NaOH)→ (B) + NaCl + H₂O Compounds (A) and (B) are respectively
- (a) NaClO and NaClO₃
- (b) NaClO₂ and NaOCl
- (c) NaClO₃ and NaOCl
- (d) NaOCl and NaOCl₂
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Answer: (a)
49. A molecule in vibrational motion is associated with energy equal to the following
- (a) (3/2)kT
- (b) (1/2)kT
- (c) kT
- (d) 2kT
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Answer: (c)
50. In the above reaction, in the nitrating mixture, HNO₃ acts as
- (a) a base
- (b) an acid
- (c) a catalyst
- (d) a reducing agent
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Answer: (a)
51. The above reaction is called
- (a) Amadori rearrangement
- (b) Lobry de Bruyn van Ekenstein rearrangement
- (c) Wallach rearrangement
- (d) Semidine rearrangement
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Answer: (b)
52. Which one of the following represent the compressibility factor of a perfect gas ?
- (a) 0
- (b) 1
- (c) 2
- (d) 3
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Answer: (b)
53. The above mentioned compound is precisely termed as
- (a) Base
- (b) Proton sponge
- (c) Electron sponge
- (d) Acid
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Answer: (b)
54. I₂ (A) + I⁻ → I₃⁻ (B) (A) + I⁺ → I₃⁺ (C) Correct order of ν_I-I in A, B, C are
- (a) A > B > C
- (b) A < B < C
- (c) A < C < B
- (d) B > A > C
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Answer: (b)
55. Which one of the following undergoes the Diels-Alder reaction ?
- (a) Thiophene
- (b) Pyridine
- (c) Pyrrole
- (d) Furan
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Answer: (d)
56. Which carbanion is most stable among given below ?
- (a) R−C≡C⁻
- (b) R₂C=C⁻−R
- (c) R₃C−CH₂⁻
- (d) CH₃⁻
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Answer: (a)
57. For a reaction in equilibrium state, the value of (ΔG)_P,T is
- (a) Zero
- (b) +ve
- (c) −ve
- (d) Depends on the reaction
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Answer: (a)
58. Geometries of N(CH₃)₃ and N(SiH₃)₃ are respectively
- (a) Planar and Pyramidal
- (b) Planar and Planar
- (c) Pyramidal and Planar
- (d) Pyramidal and Pyramidal
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Answer: (c)
59. Given that, ΔH°f (HCl) = −92.3 kJmol⁻¹ and ΔHf(HCl.100H₂O) = −168.1 kJmol⁻¹. The enthalpy of dissolution of one mole of HCl in 100 moles of water is
- (a) −260.4 kJ
- (b) +260.4 kJ
- (c) −75.8 kJ
- (d) +75.8 kJ
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Answer: (c)
60. Indicate the product P in the following reaction.
- (a)
- (b)
- (c)
- (d)
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Answer: (a)
61. In the following reaction the product P is
- (a)
- (b)
- (c)
- (d)
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Answer: (a)
62. CFSE will be highest for
- (a) [CoF₆]³⁻
- (b) [Co(NCS)₄]²⁻
- (c) [Mn(H₂O)₆]²⁺
- (d) [Co(NH₃)₆]³⁺
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Answer: (d)
63. Calomel electrode is an example of
- (a) Metal-metal ion electrode
- (b) Metal-amalgam electrode
- (c) Oxidation-reduction electrode
- (d) Metal-insoluble metal ion-soluble same anion electrode
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Answer: (d)
64. In the following reactions, products (A) and (B) respectively, are NaOH(hot and conc.) + Cl₂ → A + side-product Ca(OH)₂ (dry) + Cl₂ → B + side-product
- (a) NaClO₃ and Ca(ClO₃)₂
- (b) NaOCl and Ca(ClO₃)₂
- (c) NaClO₃ and Ca(OCl)₂
- (d) NaOCl and Ca(OCl)₂
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Answer: (c)
65. The effect of increase in temperature on rate of enzyme catalyzed reaction is
- (a) Increases
- (b) Decreases
- (c) Reaches to an optimum value and then decreases
- (d) For some increases and for some decreases
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Answer: (c)
66. The temperature above which a real gas cannot be liquified is known as
- (a) Critical temperature
- (b) Consolute temperature
- (c) Boyle temperature
- (d) Inversion temperature
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Answer: (a)
67. The most suitable alkali metal to remove traces of N₂ from highly pure argon gas is
- (a) Li
- (b) K
- (c) Rb
- (d) Cs
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Answer: (a)
68. Which of the following figure represents the 3s atomic orbital ?
- (a)
- (b)
- (c)
- (d)
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Answer: (c)
69. The pair of ions that most commonly forms complexes with coordination number two
- (a) Cd(II), Hg(II)
- (b) Cu(II), Hg(I)
- (c) Cu(I), Hg(I)
- (d) Cu(I), Hg(II)
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Answer: (d)
70. The example of a vat dye is
- (a) Indigo
- (b) Alizarin
- (c) Malachite green
- (d) Methyl orange
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Answer: (a)
71. Select the crystal system which has no symmetry
- (a) Tetragonal
- (b) Monoclinic
- (c) Triclinic
- (d) Hexagonal
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Answer: (c)
72. The complex can be formally formed from K₂[PtCl₄] by which one of the following sequences of substitutions of the chloride ions ?
- (a) Py, Br⁻, NH₃
- (b) Br⁻, Py, NH₃
- (c) Br⁻, NH₃, Py
- (d) NH₃, Br⁻, Py
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Answer: (a)
73. Dewar benzene is
- (a) bicyclo [2, 0, 2] hexadiene
- (b) bicyclo [2, 1, 2] hexadiene
- (c) bicyclo [1, 0, 2] hexadiene
- (d) bicyclo [2, 2, 0] hexadiene
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Answer: (d)
74. Identify the product of the following reaction.
- (a) Phenanthrene
- (b) Naphthalene
- (c) 2-Methylanthracene
- (d) Anthracene
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Answer: (d)
75. C₆H₅CONH₂ + P₂O₅ —(Δ)→ Product. The product of the above reaction is
- (a) C₆H₅NH₂
- (b) C₆H₅CN
- (c) C₆H₅CH₂NH₂
- (d) C₆H₅NC
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Answer: (b)
76. The acid-base concept involving molten condition is
- (a) Arrhenius concept
- (b) Lowry-Bronsted concept
- (c) Lux-flood concept
- (d) Lewis concept
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Answer: (c)
77. Which of the following statement is not correct ?
- (a) Cu²⁺ ion behaves as harder acid than Mn²⁺ ion
- (b) Cs⁺ ion is harder acid than Li⁺ ion
- (c) NH₃ is harder base than C₆H₅NH₂
- (d) (C₆H₅)₂NH is a soft base
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Answer: (b)
78. A monobasic acid has a dissociation constant equal to 1.8×10⁻⁵ at 25°C. Its degree of dissociation at a concentration of 0.20 M at the same temperature is
- (a) 0.00949
- (b) 0.00849
- (c) 0.00994
- (d) 0.00489
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Answer: (a)
79. Electrophilic substitution in quinoline takes place preferentially at which position ?
- (a) 2
- (b) 3
- (c) 7
- (d) 8
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Answer: (d)
80. The α-Helix structure of protein is stabilised by
- (a) Peptide bond
- (b) Vander-Waals forces
- (c) Hydrogen bond
- (d) Dipole-dipole force
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Answer: (c)
81. Most probable velocity (C_mp) of a gas molecule is given by the following expression
- (a) C_mp = √(8RT/πM)
- (b) C_mp = √(3RT/M)
- (c) C_mp = √(2RT/M)
- (d) C_mp = √(RT/M)
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Answer: (c)
82. An ion M²⁺ forms the complex [M(H₂O)₆]²⁺, [M(en)₃]²⁺ and [MBr₆]⁴⁻. Match the complex with appropriate colour.
- (a) green, blue, red
- (b) blue, red, green
- (c) green, red, blue
- (d) red, blue, green
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Answer: (c)
83. Bond enthalpy is evaluated by using following
- (a) Kirchoff’s equation
- (b) Gibbs Duhem equation
- (c) Hess law
- (d) Maxwell’s relations
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Answer: (c)
84. Naphthalene on oxidation with chromiumtrioxide and acetic acid gives
- (a)
- (b)
- (c)
- (d)
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Answer: (c)
85. This reaction can be explained by
- (a) SN₁ mechanism
- (b) SN₂ mechanism
- (c) E₂ mechanism
- (d) SNᵢ mechanism
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Answer: (d)
86. Which one of the following theories is used to explain homogeneous catalysis ?
- (a) Intermediate compound theory
- (b) Adsorption theory
- (c) Arrhenius theory
- (d) Dalton’s theory
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Answer: (a)
87. Select the photochemical reaction with quantum yield two.
- (a) H₂ + Cl₂ —(hν)→ 2HCl
- (b) H₂ + Br₂ —(hν)→ 2HBr
- (c) 2HBr —(hν)→ H₂ + Br₂
- (d) SO₂ + Cl₂ —(hν)→ SO₂Cl₂
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Answer: (c)
88. Allene on reaction with dilute sulphuric acid gives
- (a) CH₃CH₂CHO
- (b) CH₃COCH₃
- (c) CH₃COCOOH
- (d) CH₃CH₂CH₃
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Answer: (b)
89. NOCl and NaNO₃ react in liquid N₂O₄ to produce
- (a) NO⁺
- (b) NO₃⁻
- (c) N₂O₄ and NaCl
- (d) NaNO₃ and NaCl
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Answer: (c)
90. The correct order of LMCT energies is
- (a) MnO₄⁻ < CrO₄²⁻ < VO₄³⁻
- (b) MnO₄⁻ > CrO₄²⁻ > VO₄³⁻
- (c) MnO₄⁻ > CrO₄²⁻ < VO₄³⁻
- (d) MnO₄⁻ < CrO₄²⁻ > VO₄³⁻
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Answer: (a)
91. What is phorone ?
- (a) (CH₃)₂C═CHCOCH═C(CH₃)₂
- (b) (CH₃)₂C═CHCOCH₃
- (c) (CH₃)₂C═CHCOCH₂OH
- (d) CH₃COCH₂CH₂COCH₃
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Answer: (a)
92. Conductivity at infinite dilution of CH₃COONH₄ can be determined by using following
- (a) Hittorf method
- (b) Kohlrausch law
- (c) Arrhenius theory
- (d) Debye-Huckel-Onsagar equation
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Answer: (b)
93. The octahedral complex which shows both fac- and mer- isomerism
- (a) triglycinatocobalt(III)
- (b) tris(ethylenediamine)cobalt(III)
- (c) dichlorodiglycinatocobalt(III)
- (d) trioxalatocobaltate(III)
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Answer: (a)
94. Which of the following will not give haloform reaction ?
- (a) CH₃ − CHO
- (b) CH₃ − CO − CH₃
- (c) CH₃ − CH₂ − CO − CH₃
- (d) CH₃ − CH₂ − CO − CH₂ − CH₃
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Answer: (d)
95. Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is
- (a) R₃SiCl
- (b) R₄Si
- (c) RSiCl₃
- (d) R₂SiCl₂
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Answer: (c)
96. Which of the following does not obey EAN rule ?
- (a) Fe(CO)₄
- (b) V(CO)₆
- (c) K₄[Fe(CN)₆]
- (d) Mn₂(CO)₁₀
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Answer: —
97. The resistance of 0.01 M solution of an electrolyte is 210 ohm at 25°C. The molar conductance of solution is (cell constant = 0.90)
- (a) 0.0410 sm² mol⁻¹
- (b) 0.0419 sm² mol⁻¹
- (c) 0.0423 sm² mol⁻¹
- (d) 0.0429 sm² mol⁻¹
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Answer: (d)
98. If 3g urea is dissolved in 45g water, the relative lowering of vapour pressure will be
- (a) 0.02
- (b) 0.01
- (c) 0.04
- (d) 0.05
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Answer: (a)
99. In potassium permanganate the dark colour arises because of
- (a) Polarisation
- (b) d − d transition
- (c) Both polarisation and d − d transition
- (d) Charge transfer transition
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Answer: (d)
100. The CFSE for [CoCl₆]⁴⁻ is 18000 cm⁻¹ Δt for [CoCl₄]²⁻ will be
- (a) 18000 cm⁻¹
- (b) 16000 cm⁻¹
- (c) 8000 cm⁻¹
- (d) 7450 cm⁻¹
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Answer: (c)
101. Which positions are very reactive in phenanthrene ?
- (a) 1, 2
- (b) 9, 10
- (c) 3, 4
- (d) 5, 6
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Answer: (b)
102. Which intermediate forms triptycene on reaction with anthracene ?
- (a) Benzyne
- (b) Carbene
- (c) Nitrene
- (d) Carbocation
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Answer: (a)
103. Reaction of acetone with selenium dioxide forms
- (a) CHO−CHO
- (b) CHO−CH₂OH
- (c) CH₃COCHO
- (d) CH₃COCOOH
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Answer: (c)
104. Match the following compounds (Column – I) with their uses (Column – II). Column-I — Column-II I. Ca(OH)₂ — a. Cast of statues II. NaCl — b. White wash III. CaSO₄·0.5 H₂O — c. Antacids IV. CaCO₃ — d. Washing soda preparation Code : I II III IV
- (a) d a c b
- (b) b d a c
- (c) b c d a
- (d) c d b a
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Answer: (b)
105. Which of the following reaction will be preferred to remain on the left side ?
- (a) CaS + H₂O → CaO + H₂S
- (b) HgF₂ + BeI₂ → HgI₂ + BeF₂
- (c) BeF₂ + HgI₂ → HgF₂ + BeI₂
- (d) LiI + CsF → LiF + CsI
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Answer: (c)
106. Reaction is known as
- (a) Carbylamine reaction
- (b) Chichibabin reaction
- (c) Sandmeyer reaction
- (d) None of the above
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Answer: (b)
107. The order of reaction C₁₂H₂₂O₁₁ + H₂O —(H⁺)→ C₆H₁₁O₆ + C₆H₁₁O₆ is
- (a) Zero
- (b) Half
- (c) One
- (d) Two
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Answer: (c)
108. The number of S═O and S−OH bonds present in Marshall’s acid and Oleum, respectively are
- (a) (4 and 2) and (4 and 2)
- (b) (2 and 4) and (2 and 4)
- (c) (4 and 2) and (2 and 4)
- (d) (2 and 2) and (2 and 2)
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Answer: (a)
109. Which one of the following is responsible for lesser pressure of a real gas in comparison to an ideal gas ?
- (a) Finite size of molecules
- (b) Enhancement of kinetic energy of molecules
- (c) Viscosity
- (d) Intermolecular forces
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Answer: (d)
110. For which group of cations the magnetic moment can be given by spin only formula ?
- (a) Gd³⁺ and Lu³⁺
- (b) Ce³⁺ and Nd³⁺
- (c) Yb³⁺ and Tm³⁺
- (d) Pm³⁺ and HO³⁺
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Answer: (a)
111. In liquid ammonia, sulphamic acid behaves as
- (a) Monobasic acid
- (b) Tribasic acid
- (c) Dibasic acid
- (d) Base
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Answer: (c)
112. Ethanol on reaction with bromine in aqueous solution gives
- (a) CH₃COOH
- (b) CH₃CHO
- (c) CH₂═CH₂
- (d) CH₂═CH − OH
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Answer: (b)
113. Which one is not nucleophilic reagent in the following ?
- (a) CH₃⁻
- (b) NH₂⁻
- (c) :CH₂
- (d) R − Ö − R
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Answer: (c)
114. The unit of rate constant for zero order reaction is
- (a) s⁻¹
- (b) mol dm⁻³ s⁻¹
- (c) mol⁻¹ dm⁻³ s⁻¹
- (d) mol⁻² dm⁻⁶ s⁻¹
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Answer: (b)
115. C_V for CO₂ at room temperature is equal to (assume 20% vibrational contribution at room temperature)
- (a) 54.04 JK⁻¹mol⁻¹
- (b) 27.44 JK⁻¹mol⁻¹
- (c) 22.44 JK⁻¹mol⁻¹
- (d) 12.44 JK⁻¹mol⁻¹
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Answer: (b)
116. In the reaction BrMg(CH₂)₅MgBr + CH₃CO₂C₂H₅ → P what is P ?
- (a)
- (b)
- (c)
- (d)
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Answer: (c)
117. If the gold number for the colloidal solutions A, B and C are 0.1, 2.5 and 20 respectively, the order of protective powers of these colloids will be
- (a) C > B > A
- (b) A > B > C
- (c) A = B = C
- (d) B > A > C
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Answer: (b)
118. Which one of the following is hydrolysed more rapidly ?
- (a) CH₃Cl
- (b) CH₃CH₂Cl
- (c) CH₂═CHCl
- (d) CH₃OCH₂Cl
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Answer: (d)
119. What type of reaction takes place upon treatment of ketone with HCN to form a cyanohydrin ?
- (a) Nucleophilic addition reaction
- (b) Electrophilic substitution reaction
- (c) Electrophilic addition reaction
- (d) Nucleophilic substitution reaction
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Answer: (a)
120. The expression I = I₀e^(−∈cl) is known as
- (a) Lambert law
- (b) Lambert-Beer law
- (c) Grotthus-Draper law
- (d) Stark-Einstein law
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Answer: (b)
121. A 5.13% sugar solution is isotonic with a 0.9% unknown solution. The molar mass of the solute is
- (a) 51.3
- (b) 60.0
- (c) 72.4
- (d) 90.0
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Answer: (b)
122. Among the given statements about structure of NH₃ and H₃O⁺, which one is incorrect ?
- (a) All N − H bonds in NH₃ are equal in length and strength
- (b) All O − H bonds in H₃O⁺ are equal in length and strength
- (c) N in NH₃ and O in H₃O⁺, both the atoms involve sp³ hybridization
- (d) Number of lone pairs of electrons on N atom is only one but it is two in case of O in H₃O⁺
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Answer: (d)
123. The anodic oxidation, in the electrolysis of ice cold H₂SO₄(50%) between Pt electrodes at high current density, gives
- (a) Oleum, H₂S₂O₇
- (b) Dithionic acid, H₂S₂O₆
- (c) Marshall’s acid, H₂S₂O₈
- (d) Caro’s acid, H₂SO₅
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Answer: (c)
124. OsO₄ + 9CO → Os(CO)₅ + 4CO₂ The above mentioned reaction is
- (a) Substitution reaction
- (b) Direct carbonylation reaction
- (c) Reductive carbonylation reaction
- (d) Reduction reaction
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Answer: (c)
125. Which of the following metalloenzymes do not contain zinc ?
- (a) Carboxy peptidase
- (b) Carbonic anhydrase
- (c) Nitrogenase
- (d) Alcohol dehydrogenase
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Answer: (c)

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Answer key

Answer key from the U.P. Secondary Education Services Selection Board’s official answer key for this sitting. “—” means the key gave none: the question was deleted.

Chemistry

Q 1: (b)
Q 2: (d)
Q 3: (c)
Q 4: (a)
Q 5: (b)
Q 6: —
Q 7: (b)
Q 8: (c)
Q 9: (c)
Q 10: (a)
Q 11: (a)
Q 12: (c)
Q 13: (c)
Q 14: (b)
Q 15: (d)
Q 16: (d)
Q 17: (c)
Q 18: (b)
Q 19: (d)
Q 20: (c)
Q 21: (c)
Q 22: (d)
Q 23: (c)
Q 24: (b)
Q 25: (d)
Q 26: (b)
Q 27: (c)
Q 28: (c)
Q 29: —
Q 30: (b)
Q 31: (b)
Q 32: (c)
Q 33: (d)
Q 34: (c)
Q 35: (d)
Q 36: (d)
Q 37: (c)
Q 38: (b)
Q 39: (a)
Q 40: (b)
Q 41: (b)
Q 42: (b)
Q 43: (a)
Q 44: (d)
Q 45: (a)
Q 46: (b)
Q 47: (a)
Q 48: (a)
Q 49: (c)
Q 50: (a)
Q 51: (b)
Q 52: (b)
Q 53: (b)
Q 54: (b)
Q 55: (d)
Q 56: (a)
Q 57: (a)
Q 58: (c)
Q 59: (c)
Q 60: (a)
Q 61: (a)
Q 62: (d)
Q 63: (d)
Q 64: (c)
Q 65: (c)
Q 66: (a)
Q 67: (a)
Q 68: (c)
Q 69: (d)
Q 70: (a)
Q 71: (c)
Q 72: (a)
Q 73: (d)
Q 74: (d)
Q 75: (b)
Q 76: (c)
Q 77: (b)
Q 78: (a)
Q 79: (d)
Q 80: (c)
Q 81: (c)
Q 82: (c)
Q 83: (c)
Q 84: (c)
Q 85: (d)
Q 86: (a)
Q 87: (c)
Q 88: (b)
Q 89: (c)
Q 90: (a)
Q 91: (a)
Q 92: (b)
Q 93: (a)
Q 94: (d)
Q 95: (c)
Q 96: —
Q 97: (d)
Q 98: (a)
Q 99: (d)
Q 100: (c)
Q 101: (b)
Q 102: (a)
Q 103: (c)
Q 104: (b)
Q 105: (c)
Q 106: (b)
Q 107: (c)
Q 108: (a)
Q 109: (d)
Q 110: (a)
Q 111: (c)
Q 112: (b)
Q 113: (c)
Q 114: (b)
Q 115: (b)
Q 116: (c)
Q 117: (b)
Q 118: (d)
Q 119: (a)
Q 120: (b)
Q 121: (b)
Q 122: (d)
Q 123: (c)
Q 124: (c)
Q 125: (c)