Question

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

• A. $CHC{l}_3$
• B. $H_{3}CCl$
• C. $H_{3}COH$
• D. $C_2{H}_{5}Cl$

Answer 1

Answer: (A)

In the presence of air and light, chloroform forms carbonyl chloride (also called phosgene) which is extremely poisonous.
$\underset{\text{chloroform}}{CHC{l}_3}+\frac{1}{2}{O}_2\stackrel{\text{ Air and light }}{\to }\underset{\text{phosgene}}{COC{l}_2}+HCl$