Q.1
At 90°C, pure water has H3O+ ion concentration of 10-6 mol/L. the Kw at 90°C is
  • a) 10-12
  • b) 10-14
  • c)10-6
  • d)10-8
Q.2
The value of ionic product of water at 393K is [ Tamil Nadu CET 2002]
  • a) Less than 1 × 10⁻¹⁴
  • b) Greater than 1 × 10⁻¹⁴
  • c)Equal to 1 × 10⁻¹⁴
  • d)Equal to 1 × 10⁻⁷
Q.3
The precipitate of CaF2 ( Ksp=1.7 ×10⁻¹⁰) is obtained when equal volumes of the following are mixed
  • a)10-4 M Ca2+ + 10-4 M F-
  • b) 10-2 M Ca2+ + 10-3 M F-
  • c)10-5 M Ca2+ + 10-3 M F-
  • d)10-3 M Ca2+ + 10-5 M F-
Q.4
The solubility product of salt having general formula MX2 in water is , 4 ×10-The concentration of M2+ ions in the aqueous solution of the salt is [ AIEEE 2005]
  • a) 2.0 × 10⁻⁶ M
  • b) 1.0 × 10⁻⁴ M
  • c)1.6 × 10⁻⁴ M
  • d)4.0 × 10⁻¹⁰ M
Q.5
hydrogen ion concentration in mol/L in solution of pH=5.4 will be [ AIEEE 2005]
  • a) 3.98 × 108
  • b) 3.88 × 106
  • c)3.68 ×10⁻⁶
  • d)3.98 × 10⁻⁶
Q.6
The pKb for fluoride ion at 25°C is 10.83, the ionization constant of hydrofluoric acid at this temperature is ... [ IIT 1997]
  • a) 1.74 × 10⁻²
  • b) 3.52 × 10⁻⁵
  • c)6.57 ×10⁻⁴
  • d)5.38 ×10⁻²
Q.7
Hydrogen ion concentration of an aqueous solution is 1 × 10⁻⁴M. The solution is diluted with equal volume of water. Hydroxyl ion concentration of the resultant solution in terms of mol dm-3 is [ Karnataka CET 2001]
  • a) 1 × 10⁻⁸
  • b) 1 × 10⁻⁶
  • c) 2 × 10⁻¹⁰
  • d) 0.5× 10⁻¹⁰
Q.8
Solid Ba(NO3)2 is gradually dissolved in a 1.0 × 10- M, Na2CO3 solution. At what concentration of Ba2+ will a precipitate being to form ? Ksp for BaCO3=5.1 × 10⁻⁹) [ AIEEE 2009]
  • a) 4.1 × 10⁻⁵M
  • b) 5.1 × 10⁻⁵M
  • c) 8.1 × 10⁻⁸M
  • d) 8.1 × 10⁻⁷M
Q.9
For reaction 2NO2(g) ↔ 2NO(g) + O2(g) Kc=1.8 ×10⁻⁶ at 185°C, the value of Kc for reaction NO + ½O2 ↔ NO2 is ..[MLNR 1993]
  • a) 0.9 × 106
  • b) 7.5 × 102
  • c)1.95 × 10⁻³
  • d)1.95 ×103
Q.10
If Kp for a reactionA(g) + 2B(g) ↔ 3C(g) + D(g) is 0.05 atm at 1000K. Its Kc in terms of R will be.. [CBSE PMT 1989]
  • a) 20000R
  • b) 0.02R
  • c) 5×10⁻⁵R
  • d) 5×10⁻⁵/R
Q.11
The KSP of Ag2CrOAgCl, AgBr and AgI are respectively 1.1×10⁻¹², 1.8×10⁻¹⁰, 5.0 ×10⁻¹³, 8.3×10⁻¹⁷ Which of the following salts will precipitate last if AgNO3solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4? [ AIPMT 2013]
  • a) AgI
  • b) AgCl
  • c) AgBr
  • d) Ag2CrO4
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