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1 A reaction is reversible because
(a) reactants are reactive (b) products are reactive
(c) products are stable (d) reactants are stable
2 A large value of Kc means that at equilibrium
(a) less reactants and more products
(b) more reactants and less product
(c) same amount
(d) none
3 Extent to H2 + I2 2HI can be increased by
(a) increasing pressure (b) increasing product
(c) increasing temp (d) adding a catalyst
4 Strength of an acid can be determined by
(a) PKa (b) PKp
(c) POH (d) PKw
5 In an exothermic reversible reaction increase in temp shifts the equilibrium to
(a) reactant side (b) product side
(c) remains unchanged (d) none
6 Units of Kw are
(a) mole dm–3 (b) mole2 dm–3
(c) mole2 dm–6 (d) mole2 dm–3
7 A basic Buffer solution can be prepared by mixing
(a) weak acid and its salt with strong base
(b) strong acid and its salt with weak base
(c) weak base and its salt with strong acid
(d) strong base and its salt with weak acid
8 Buffer action can be explained by
(a) common ion effect (b) law of mass action
(c) Le–Chatlier’s principle (d) all above 9 Ionization of weak acid is expressed in term of following constant (a) Kw (b) Kn (c) Ka (d) Kb 10 Solubility of Ca(OH)2 is exothermic. If solubility will increase
(a) at high temp (b) at low temp (c) temp independent (d) none
11 For which system does the equilibrium constant, Kc has units of concentration (a) N2 + 3H2 2NH3 (b) H2 + I2 2 HI (c) 2NO2 N2O4 (d) 2HF H2 + F2
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12 Which statement about the following equilibrium is correct
2SO2(g) + O2(g) 2SO3(g) H = – 188.3 kJ mol–1
(a) the value of Kp falls with a rise in temp
(b) the value of Kp falls with increasing pressure
(c) adding V2O5 catalyst increase the equilibrium yield of sulphur trioxide
(d) the value of Kp is equal to Kc
13 The PH of 10–3 mole dm–3 of an aqueous solution of H2SO4 is
(a) 3.0 (b) 2.7 (c) 2.0 (d) 1.5
14 The solubility product of AgCl is 2.0 x 10–10 mole2 dm–6. The max concentration of Ag+ ions in
the solution is
(a) 2.0 x 10–10 mol dm–3 (b) 1.41 x 10–5 mol dm–3
(c) 1.0 x 10–10 mol dm–3 (d) 4.0 x 10–20 mol dm–3
15 An excess of aqueous silver nitrate to added to aqueous barium chloride and precipitate is removed
by filtration what are the main ions in the filtrate
(a) Ag+ and NO only (b) Ag+ and Ba2+ and NO3
(c) Ba2+ and NO only (d) Ba+2 and NO and Cl–
16 For N2 + 3H2 2NH3
(a) Kc = Kp (b) Kp = Kc RT
(c) Kp = Kc (RT)–2 (d) Kp = Kc (RT)–1
17 H2 + I2 2HI
In the above equilibrium system, if the conc. of reactants of 25oC is increased, the value of Kc
will
(a) increase (b) decrease
(c) remains constant (d) depends upon nature of reactants
18 In a chemical reaction, equilibrium is said to have established when
(a) opposing reactions stops
(b) concentrations of reactants and products are equal
(c) rate constants of opposing reactions are equal
19 The relation between Kc and Kp is
(a) Kc = Kp (RT) n (b) Kp = Kc (RT) n
(c) Kp = Kc (RT) n (d) Kp = Kc
20 The precipitation occurs if the ionic concentration is
(a) less than Ksp (b) more than Ksp
(c) equal to Ksp (d) is present at any moment
21 The PH of oranges is
(a) 3.5 (b) 3.1 (c) 4.6 (d) 4.2
22 Which one of following solution have zero PH
(a) 1M HCl (b) 0.5 MH2SO4
(c) 0.1 M HNO3 (d) 1M CH3COOH
23 The solubility product expression for BaF2 can be written as
(a) [Ba2+] [F–] (b) [Ba2+] [2F]
(c) [Ba2+] [F–]2 (d) [Ba+] [F–]2
24 To prepare a buffer with PH close to 9.0, you could use a mixture of
(a) NH4OH and NH4Cl (b) CH3COOH and CH3COONa
(c) HNO2 + NaNO2 (d) NaHCO3 + H2CO3
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25 For which reaction the numerical value of Kc and Kp are same
(a) N2 + 3H2 2NH3 (b) 2SO2 + O2 2SO3
36 The unit of Kc for reaction N2 + O2 2NO (a) mol dm–3 (b) mol–1 dm3 (c) mol–2 dm6 (d) no units
37 PH of pure water is (a) 3.2 (b) 4.2 (c) 7.0 (d) 0
(c) H2 + Cl2 2HCl (d) N2O4 2NO2
26 For which system does the equilibrium constant Kc have units (mole dm–3)–1
(a) H2 + I2 2HI (b) N2 + 3H2 2NH3
(c) 2NO2 N2O4 (d) CH3COOH + C2H5OH CH3COOC2H5 + H2O
27 What can affect the magnitude of equilibrium constant Kp of a reversible gaseous reaction
(a) temperature (b) pressure (c) catalyst (d) none
28 Which gas can change the PH towards acidic
(a) argon (b) carbon dioxide (c) nitrogen (d) oxygen
29 The solution having zero PH will be
(a) basic (b) high basic (c) neutral (d) highly acidic
30 A solution have H+ ions concentration 1 x 10–7 its PH will be
(a) acid (b) basic (c) neutral (d) zero
31 Which one of the following has highest PH
(a) 0.1 M HCl (b) 1.0 M HCl (c) gastric juice (d) lemons
32 Which PH is considered as basic
(a) 1 (b) 7 (c) 2 (d) 11
33 The sum of PH and POH is
(a) 2 (b) 7 (c) 14 (d) 13.5
34 A buffer solution can be prepared by mixing
(a) a strong acid and weak base (b) a weak acid and weak base (c) a strong acid and its salt (d) a weak base and its salt with strong acid 35 Law of mass action was presented by (a) Henderson (b) Lewis (c) Guldberg and Waage (d) Arrehenius
(d) by adding more H2 and I2
40 Which of following change will favour the formation of more HI in the given reaction H2 + I2 2HI
(a) increasing pressure (b) decreasing pressure (c) by adding more HI
38 Which of following change will favour the formation of more SO3 at equilibrium
2SO2 + O2 2SO3 + heat
(a) by adding SO3 at equilibrium (b) by increasing temp
(c) by decreasing temp (d) by decreasing pressure
39 When pressure is applied to the given equilibrium ice water which of the following will happen
(a) more ice will be formed (b) more water will be formed
(c) equilibrium will not be disturbed (d) water will formed
(a) PCls(g) PCl3(g) Cl2(g) (b) N2(g) 3H2(g) 2NH3(g)
(c) N2(g) O2(g) 2NO(g) (d) SO2Cl2(g) SO2(g) Cl2(g)
41. One of the following equilibria is not affected by change in volume of the flask.
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(a) M102 -5 (b) M101 -4 (c) M105 -9 (d) M102.2 -446. Calculate concentration of sodium acetate which should be added to 0.1 M solution of
aK3CH COOH P 4.5 to give a solution of 5.5PH
(a) I (b) OH3 (c) HCl (d)
(a) OH3 (b) 3BF (c) OH
2NH is
(a) 4NH (b) 3NH (c) 42HN (d) OHNH2
50. conjugate base of hydrazoic acid is
(a) 3HN (b)
2N (c) 3N (d) 3N
51. In which of the following reaction 3NH acts as acid ?
(a) ClNHHClNH 43 (b) 43 NHHNH
(c) 3 2 21NH Na NaNH H2
(d) 3NH cannot act as acid.
3 2 3CO H O HCO OH
(ii) 2 2 2 3CO H O H CO
(iii) 3 2 4NH H O NH OH.
(iv) 2 3HCl H O Cl H O
3HCO (d) 3NH
42. Equal volmes of two solution of PH 3and 4 are mixed The PH of the resulting solution will be(a) 7 (b) 3.5 (c) 2.96 (d) 3.26
43. PH of 108 M solution of Hcl in water is(a) 8 (b) -8 (c) between 7 and 8 (d) between 6 and 7
PH of buffer is44. A certain buffer solution contains equal concentration of X and HX . Ka for HX is 108 . The
(a) 3 (b) 8 (c) 11 (d) 14
45. The solubility product of AgCl is 41010at 298k The solubility of AgCl in 0.04M CaCl2 will be
(a) 1.0 M (b) 0.1 M (c) 0.2 M (d) 10.0 M47. Which of the following is a base according to lowry-bronsted concept ?
NH 4
48. According to lowry-bronsted concept which one of the following is considered as an acid ?(d) Cl
49. The conjugate acid of
Which of the pairs of reaction proves that water is amphoteric in character ?(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (iii)
53. One of the following is a bronsted acid but not a bronsted base :(a) H2S (b) H2O (c)
52. Consider the following reactions.(i) 2
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2 4 2 3 4H SO H O H O HSO are
(a) OH,OH 32 (b) OH,HSO 24 (c) 423 SOH,OH (d)
442 HSO,SOH
58. Whichof the following weakest ?(a) 10
6 5 2 bC H NH : K 3.8 10 (b) 5b4 106.1K:OHNH
(c) 42 5 2 bC H NH : K 5.6 10 (d) 10
9 7 bC H N : K 6.3 10
(c) 3[H O ] will increase (d) 3[H O ] will decrease
60. According to lowry and bronsted system, the chloride ion
61. The HP of a buffer containing equal molar concentration of a weak base and its
chlorides is 5bK for weak base 2 10 log 2 0.3010
(a) 5 (b) 9 (c) 4.7 (d) 9.362. Solution of 0.1 N OHNH4 and 0.1N ClNH4 has HP 9.25.Then
bKP is(a) 9.25 (b) 4.75 (c) 3.75 (d) 8.25
63. The solubility of product barium sulphate is 9105.1 at C18 Its solubility in water at C18 is
(a) 19 Lmol105.1 (b) 15 Lmol105.1
(c) 19 Lmol109.3 (d) 15 Lmol109.3 64. The least soluble compound (salt) of the following is
(a) ZnS 23Ksp .2 10 (b) 3OH >Cl CH COO
(c) 12CsCl Ksp 1 10 (d) 5
of 0.01 M glycine solution ? For glycine 31 105.4Ka and
102 107.1Ka at 298k.
(a) 3.0 (b) 10.0 (c) 6.1 (d) 7.06
54. The conjugate base in the following reaction
55. With increase in temperature, ionic product of water(a) Decreases (b) Increases(c) Remains same (d) May increase or decrease.
Arrhenius acid (b) Bronsted base.(c) Lewis base (d)
56. EDTA is a/an(a)
All of above57. The units of lonic product of water (kw) are :
(a) mol1 L1 (b) mol2 L2 (c) mol2 L1 (d) mol2 L2
59. On adding ammonia to water,(a) Ionic product will increase (b) Ionic product will decrease
(a) Weak base (b) Strong base(c) Weak acid (d) Strong acid
Cl in aqueous solution is a
PbCl2 Ksp 1.710
65. What is the value of PH
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66. Solid At what concentration of will precipitate ?
93Ksp of BaCO 5.1 10
(a) 5101.4 M (b) M101.5 5 (c) M101.8 5 (d) 78.1 10 M
67. What is the OH in the final solution prepared by mixing of 20.0 ml of 0.05 M HCl with 30.0
ml of 0.1 M 2OHBa (?)(a) 0.4 M (b) 0.05 M (c) 0.12 M (d) 0.1 M
at 298 k. Hydrolysis constant of it is
(a) 12105.6 (b) 131065.5 (c) 121065.5
of 0.01 Msolution of its sodium salt is(a) 0 (b) 1 (c) 7 (d) 8
70. Number of H ions present in 500 ml of lemon juice of 3PH is(a) 2210506.1 (b) 2010012.3 (c) 2210102.3
(?)
(a) 2SrCl (b) 2BaCl (c) 2MgCl (d) 2CaCl
72. Solubility products constants (KSP) of the salt types 2 3MX, MX and M X at temp T. are8 14 154 10 ,3.2 10 and 2.7 10 respectively. Solubility of the salts at temp. T are in the order,,
(a) 23 MXXMMX (b) MXXMMX 32
(c) MXMXXM 23 (d) XMMXMX 32
73. When H ion concentration of a solution increases(a) PH increses (b) PH decreases (c) no change in PH (d) POH decreases
74. At C25 temp. the value of bpk for 3NH in aqueous solution is 4.7. what is the value of HP of 0.1
M aqueous solution of ClNH4 with 0.1 M 3NH (?)`(a) 8.3 (b) 9 (c) 9.5 (d) 10
75. The aqueous solution of 6 5 3HCOO Na, C H NH Cl, and KCN are respectively(a) Acidic, acidic, basic (b) Acidic, basic, neutral(c) Basic, acidic, basic (d) Basic, neutral, basic
76. KSP of 3AgIO is -8101 at a given temperature what is the mass of 3AgIO in 100 ml of itssaturated solution ?(a) gm4100.1 (b) gm2103.28 (c) 32.83 10 gm (d) gm7100.1
68. The ionisation constant of NH4OH is1.77105
(d) 5.651010
69. The dissociation consant of a substituted benzoic acid at 25C is 1.0104 The PH
in water separately. Which one of the solutionswill record the highest PH
(d) 1.5061020
71. Equimolar solution of the following were prepared
Ba NO3 2 is gradually dissolved in 1.0104 M Na 2CO3 solution.
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78. Which one of the following has the lowest HP value ?
ion concentration in the miture ?(a) 111.11 10 M (b) M107.3 12 (c) M107.3 11 (d) 121011.1 M
80. Columm I Column II
(A) O.1M CH3 COOH + 0.01M (p) 3.8 CH3 COONa
(B) 0.0 1M CH3COOH+0.1M CH3COONa (q) 5.8(C) 0.1M CH3COOH+0.1M CH3COONa (v) 7.0(D) 0.1M CH3COONH4 (s) 4.8(Pka Of CH3COOH=Pkb of NH4OH=4.8)(a) A-r, B-q, C-s, D-p(b)A-q, B-p, C-s, D-r(c)A-q, B-p, C-r, D-s(d)A-r, B-q, C-s, D-p
81. PH of a soda water bottle is(a) > 7 (b) = 7(c) < 7 (d) unpredictable.
by mixing sodium acetate and acetic acid , the ratio ofconcentration of salt and acid should be, (Ka=10-5)(a) 1:10 (b) 10:1(c) 100:1 (d) 1:100
84. The KSP of CuS, Ag2S and HgS are 10-32, 45104 and 10-54 respectively. The solubility ofthese sulphides are in order of(a) 2Ag S HgS CuS (b) 2Ag S CuS HgS
(c) 2HgS AgS CuS (d) CuS > Ag2S > HgS
77. PH of a solution containing 50 mg of sodium hydroxide in 10 dm3 of the solution is(a) 9 (b) 3.9031 (c) 10.0969 (d) 10
(a) 0.1 M HCl (b) 0.1 M KOH (c) 0.01 M HCl (d) 0.01 M KOH79. Equal volumes of three basic solutions of 11,12 and13 are mixed in a vessel. what will be the H+
(Buffer Solution) PH
82. Statement :1 PH of 10-8 HCl solution is not equal to 8Statement :2 HCI does not dissociate properly in very dilute solution.(a) Statement -1 is true. Statement -2 is true. Statement-2 is a correct explanation for statement-1(b) Statement- 1 is true. Statement-2 is true. Statement-2 is not a correct explanation of statement-1(c) Statement-1is true. Statement-2 is false.(d)Statement-1 is false.
Statement-2 is true.83. For preparing a buffer solution of PH 6
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85. The PH of neutral water is 6.8 .Then the temperature of OH2
(a) is 250C (b) is more than 250C(c) is less than 250C (d) can not be predicted.
11 6 5SP 4 SP 4 SP 2 4K of BaSO 10 , K of CaSO 10 ,K of Ag SO 10
(a) 4BaSO (b) 4CaSO (c) 2 4Ag SO (d) all of these
87. The solubility of 32BA is x mol L-1. It solubility product is
(a) 5x6 (b) 5x64 (c) 5x36 (d) 5x108
88. How much volume of 0.1 M 3CH COOH should be added to 50ml of 0.2 M 3CH COONa If wewant to prepare a buffer Solution of HP 4.91. given pKa for acetic acid is 4.76(a) 80.92 ml (b) 100 ml (c) 70.92 ml (d) 60.92 ml
89. The ionzation constant of formic acid is 4108.7 . Calculate ratio of sodium formate & formic acidin a buffer of HP 4.25(a) 9.63 (b) 3.24 (c) 6.48 (d) 3.97
90. The ionization constants of HF is 4108.6 . Calculate ionization constant of corresponding conjugatebase.(a) 10109.1 (b) 10107.1 (c) 11105.1 (d) 11109.2
91. The ionization constant of formic acid is 4108.1 around what HP will its mixture with sodiumformate give buffer solution of highest capacity(a) 3.74 (b) 7.48 (c) 4.37 (d) 3.96
blood is 7.0. It remains constant because it is neutial.93. The precipitate of 10
2 SPCaF (K 1.7 10 ) is obtained when equal volumes of the following aremixed.(a) FM10CaM10 424 (b) FM10CaM10 322
(c) FM10CaM10 325 (d) FM10CaM10 523
94. A certain buffer solution contains equal concentrations of X and HX The Ka for HX is 810 TheHP of buffer is
(a) 8 (b) 3 (c) 7 (d) 4
86. On adding 0.1 M solution each ofAg ,Ba2 and Ca2 ions. in a Na2SO4 solution. species firstprecipitated is
92. What is PH of our blood ? why does it remains constant inspite the variety of the foods and spiceswe eat ?(a) of blood is 5.4. It remains constant because.it is acidic.(b) of blood is 7.4. It remains constant because.it is buffer.(c) of blood is 10.8.It remains constant because.it is basic.(d) of
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95. The correct order of increasing OH3 in the following aqueous solution is.
(a) 2 2 4 20.1 M H S 0.1 M H SO 0.1 M NaCl 0.1 M NaNO
(b) 2 4 2 20.1 M H SO 0.1 M NaCl 0.1 M NaNO 0.1 M H S
(c) 2 2 2 40.1 M NaNO 0.1 M NaCl 0.1 M H S 0.1 M H SO
(d) 2 2 2 40.1 M NaNO 0.1 M H S 0.1 M H SO 0.1 M NaCl 96. What is the % hydrolysis of NaCN in N/80 solution when dissociation constant for HCN is
9 14W1.3 10 & K 1 10
(a) 2.48 (b) 8.2 (c) 5.26 (d) 9.697. The KSP of 10100.4isAgCl at 298 k.solubility of AgCl is 0.04 M 2CaCl will be
(a) M102 5 (b) M101 4 (c) M105 9 (d) M102.2 498. How much sodium acetate should be added to 0.1 M solution of 3CH COOH to give a solution of
HP 5.5 3pKa of CH CooH 4.5
(a) 0.1 M (b) 1.0 M (c) 0.2 M (d) 10.0 M99. The HP of solution obtained by mixing 50ml 0.4 N HCl & 50ml 0.2 N NaOH is
(a) 2log (b) 1.0 (c) 2.0log (d) 2.0
100. Ionisation constant of 3CH COOH is 5107.1 and concentration of H ions is 4104.3 The initial
concentration of 3CH COOH molecules is
(a) 4104.3 (b) 3104.3 (c) 3108.6 (d) 1.7103
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