WBJEE · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Which of the following is used to prepare \(\mathrm{Cl}_2\) gas at room temperature from concentrated \(\mathrm{HCl}\) ?
- A \(\mathrm{MnO}_2\)
- B \(\mathrm{H}_2 \mathrm{~S}\)
- C \(\mathrm{KMnO}_4\)
- D \(\mathrm{Cr}_2 \mathrm{O}_3\)
Answer & Solution
Correct Answer
(C) \(\mathrm{KMnO}_4\)
Step-by-step Solution
Detailed explanation
Hints : \(2 \mathrm{MnO}_4^{-}+16 \mathrm{H}^{+}+10 \mathrm{Cl}^{-} \rightarrow 2 \mathrm{Mn}^{2+}+5 \mathrm{Cl}_2+8 \mathrm{H}_2 \mathrm{O}\)
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