Question

Auto-oxidation of chloroform in air and sunlight produces a poisonous gas known as ______.

Options

• Tear gas

• Mustard gas

• Phosgene gas

• Chlorine gas

• Phosphine 

Answer 1

Auto-oxidation of chloroform in air and sunlight produces a poisonous gas known as phosgene gas.

Explanation:

When chloroform \[\ce{(CHCl3)}\] combines with air and sunshine, it creates Phosgene gas \[\ce{(COCl2)}\] and hydrochloric acid \[\ce{(HCl)}\].

\[\ce{2CHCl3 + \underset{(Air)}{O2} ->[Light]\underset{(poisonous gas)}{\underset{Phosgene}{2COCl2}} + 2 HCl}\]