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Question
Why chloroform is stored in dark coloured air tight bottles?
Short Note
Solution
Chloroform (CHCl3 ) when exposed to air and light forms a poisonous compound phosgene. So it is stored in cool and air-tight coloured bottles.
\[\ce{\underset{(Chloroform)}{2CHCl3} + O2 ->[sunlight]\underset{(Phosgene)}{2COCl2} + 2HCl}\]
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Uses and Environmental Effects of Some Polyhalogen Compounds
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