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  4. Phosgene is formed slowly from which one of the following on exposure to air and sunlight?

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Q. Phosgene is formed slowly from which one of the following on exposure to air and sunlight?

EAMCETEAMCET 2011

Solution:

In the presence of air and light, chloroform forms carbonyl chloride (also called phosgene) which is extremely poisonous.
$\underset{\text{chloroform}}{CHCl _{3}}+\frac{1}{2} O _{2} \xrightarrow{\text { Air and light }} \underset{\text{phosgene}}{COCl _{2}}+ HCl$