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The pH of a solution of $\mathrm{H}_2 \mathrm{O}_2$ is 6.0. Some chlorine gas is bubbled into this solution. Which of the following is correct?
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The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated
$\mathrm{H}_2 \mathrm{O}_2+\mathrm{Cl}_2 \longrightarrow 2 \mathrm{HCl}+\mathrm{O}_2$
$\mathrm{HCl}$ is formed by the reduction of chlorine by $\mathrm{H}_2 \mathrm{O}_2$, hence $\mathrm{pH}$ further decreases.
$\mathrm{HCl}$ is formed by the reduction of chlorine by $\mathrm{H}_2 \mathrm{O}_2$, hence $\mathrm{pH}$ further decreases.
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