MHT CET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Identify a compound having properties of tear gas.

A \(\mathrm{SOCl}_2\)
B \(\mathrm{COCl}_2\)
C \(\mathrm{Cl}\left(\mathrm{CH}_2\right)_2 \mathrm{~S}\left(\mathrm{CH}_2\right)_2 \mathrm{Cl}\)
D \(\mathrm{CCl}_3 \mathrm{NO}_2\)

Verified Solution

Answer & Solution

Correct Answer

(D) \(\mathrm{CCl}_3 \mathrm{NO}_2\)

Step-by-step Solution

Detailed explanation

The compound that is commonly associated with tear gas is chloropicrin, which has the chemical formula \(\mathrm{CCl}_3 \mathrm{NO}_2\). This compound is also known as trichloronitromethane. It is known for its use as a tear gas agent because it irritates the eyes and respiratory system, causing severe discomfort and sometimes even temporary blindness.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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