MCQ
Bleaching powder loses its power on keeping for a long time because
- AIt changes into calcium hypochlorate
- BIt changes into calcium chloride and calcium hydroxide
- CIt absorbs moisture
- ✓It changes into calcium chloride and calcium chlorate
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$2 \mathrm{H}_{(\mathrm{aq})}^{+}+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_2(\mathrm{~g})$
${\left[\mathrm{H}^{+}\right]=1 \mathrm{M}, \mathrm{P}_{\mathrm{H}_2}=2 \mathrm{~atm}}$
(Given: $2.303 \mathrm{RT} / \mathrm{F}=0.06 \mathrm{~V}, \log 2=0.3$ )