Q35 / 150 · MHT CET 2026 (15 April Shift 1) · Chemistry
Which of the following halogen derivative forms a poisonous phosgene, when come in contact with air and light?
- Correct answerA$\text{CHCl}_3$
- B$\text{PCl}_3$
- C$\text{C}_6\text{H}_5\text{Cl}$
- D$\text{CH}_2\text{Cl}_2$
Solution
Chloroform ($\text{CHCl}_3$) is slowly oxidized by oxygen in the presence of light to form a highly poisonous gas, carbonyl chloride, which is commonly known as phosgene.
The chemical reaction is given by:
$2\text{CHCl}_3 + \text{O}_2 \xrightarrow{h\nu} 2\text{COCl}_2 + 2\text{HCl}$
Therefore, $\text{CHCl}_3$ forms poisonous phosgene when it comes in contact with air and light.
The chemical reaction is given by:
$2\text{CHCl}_3 + \text{O}_2 \xrightarrow{h\nu} 2\text{COCl}_2 + 2\text{HCl}$
Therefore, $\text{CHCl}_3$ forms poisonous phosgene when it comes in contact with air and light.
Hence, the correct answer is option: 'A'.