Question:
Why is chloroform stored in dark coloured bottles?
Why is chloroform stored in dark coloured bottles?
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Chloroform stored in dark bottles to prevent formation of toxic phosgene.
Updated On: Mar 2, 2026
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Solution and Explanation
Chloroform undergoes slow oxidation in presence of light and air to form poisonous phosgene gas (\(COCl_2\)).
\[
CHCl_3 + O_2 \xrightarrow{light} COCl_2 + HCl
\]
Dark bottles prevent exposure to light and inhibit this reaction.
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