ionic Equilibrium MCQ Question with Answer

ionic Equilibrium MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
Ionisation constant of formic acid is 1.8 x $1.8 \times 10^{- 4}$ at 298 K. In 0.1 NHCOOH the percentage ionisation of HCOOH acid is

0.18

42.4

4.24

2.89

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Question No : 2
Solubility of calcium carbonate is 0.0305 gm/litre. $K_{s p}$ for $C a C O_{3}$ is

0.000305

193 x

10^{- 8}

9.3 x

10^{- 8}

93.05 x

1^{- 5}

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Question No : 3
$K_{s p}$ for AgCl (mol wt 143.5) is 17 x $10^{- 11}$ at 298K. The molar solubility of AgCl at 298 Kis

18.7 x

10^{- 5}

2.3 x

10^{- 3}

9.90 x

10^{- 3}

1.3 x

10^{- 5}

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Question No : 4
Strength of an acid depends on

hydrolysis

concentration of

O H^{-}

ions

concentration of

H^{+}

ions

no. of moles of base used for neutralisation

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Question No : 5
0.1 M acetic acid ionise to an extent of 1.34%. Ionisation constant of acetic acid is

0.00134

1.182

1.82 x

10^{- 5}

2.8 x

10^{- 6}

1CF6

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Question No : 6
Dissociation constant of 0.01 M HCN is 4 x $10^{- 10}$ . The $H^{-}$ concentration in the solution is

3 \times 10^{- 6} m o l e l i t^{- 1}

2 \times 10^{- 6} m o l e l i t^{- 1}

5 \times 10^{- 10} m o l e l i t^{- 1}

5 \times 10^{- 8} m o l e l i t^{- 1}

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Question No : 7
$B a S O_{4}$ (Mol. wt 233) has solubility 0.009 gm $l i t^{- 1}$ at 298 K. Its solubility product is

1.521 x

10^{- 5}

152.1 x

10^{- 19}

10"19

1.9 x

10^{- 5}

15.21 x

10^{- 9}

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