Chloropicrin a heavy colorless liquid that causes tears and vomiting and is used especially as a soil fumigant

• A. Nitro chloroform
• B. Nitrogen dioxide
• C. Nitrous oxide
• D. Larynx

Answer: (A)

Chloropicrin is a nitro-chloro compound known for being a strong irritant that causes tearing and vomiting, and it’s traditionally used as a soil fumigant because its dense, heavy liquid form tends to linger near ground level to treat soil. The best match among the options is nitrochloroform, which reflects the same nitro-chloro chemical family and the same historical use as a fumigant. The other choices don’t fit: nitrogen dioxide is a gaseous irritant but not typically used as a soil fumigant; nitrous oxide is an anesthetic gas with little to no lachrymatory effect; larynx is an anatomical term, not a chemical.