Q35 · CSIR-NET Chemistry, December 2016
Paper: CSIR-NET December 2016 · Subject: Inorganic Chemistry · Chapter: Acids and Bases · Topic: Acids & Bases – General · Marks: 2 · Difficulty: Medium
For the reaction, \[ \mathrm{HX(aq)}+\mathrm{H}_{2}\mathrm{O(l)} \stackrel{\text{gives}}{\longleftrightarrow} \mathrm{H}_{3}\mathrm{O}^{+}+\mathrm{X}^{-} \]
the highest value of $[\mathrm{X}^{-}]$, when $\mathrm{X}^{-}$ is (a)$\mathrm{OCl}^{-}$
(b)$\mathrm{F}^{-}$
(c)$\mathrm{Cl}^{-}$
(d)$\mathrm{NO}_{2}{ }^{-}$
Answer
Answer: C ✓ checked by 4AB · confidence high
The source book printed D; on checking, C is correct — see the explanation.
Explanation
[X⁻] is highest for the strongest acid. HCl is a strong acid (fully ionised); HF, HOCl and HNO₂ are weak.
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