- 1(current)
Q. No.To what volume of \(10\) litre of \(0.5 \mathrm{M} ~\mathrm{CH}_3 \mathrm{COOH}\left(K_a=1.8 \times 10^{-5}\right)\) be diluted in order to double the hydroxide ion concentration?
1. \(20 \mathrm{~L}\)
2. \(30 \mathrm{~L}\)
3. \(40 \mathrm{~L}\)
4. None of the above
1. \(20 \mathrm{~L}\)
2. \(30 \mathrm{~L}\)
3. \(40 \mathrm{~L}\)
4. None of the above
Subtopic: Ionisation Constant of Acid, Base & Salt |
From NCERT
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A certain weak acid has a dissociation constant of \(1.0 \times 10^{-4}\). The equilibrium constant for its reaction with a strong base will be:
| 1. | \(1.0 \times 10^{-4}\) | 2. | \(1.0 \times 10^{-10} \) |
| 3. | \( 1.0 \times 10^{10} \) | 4. | \( 1.0 \times 10^{14} \) |
Subtopic: Ionisation Constant of Acid, Base & Salt |
From NCERT
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Which is the correct expression for pKb in the following reaction?
\(\mathrm{H}_2 \mathrm{O}+\mathrm{NH}_3 \rightleftharpoons {\mathrm{NH}_4^{+}} \ + \mathrm{HO}^{-}\)| 1. | \(pK_{b} \ = \ log\frac{[H_{2}O][NH_{3}]}{[NH_{4}^{+}][OH^{-}]}\) |
| 2. | \(\)\(pK_{b} \ = \ log\frac{[OH^{-}][NH_{4}^{+}]}{[NH_{3}][H_{2}O]}\) |
| 3. | \(pK_{b} \ = -\ log\frac{[H_{2}O][NH_{3}]}{[NH_{4}^{+}][OH^{-}]}\) |
| 4. | \(pK_{b} \ = \ log\frac{[NH_{3}][NH_{4}^{+}]}{[OH^{-}][H_2O]}\) |
Subtopic: Ionisation Constant of Acid, Base & Salt |
From NCERT
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Q. No.
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