COMEDK · Chemistry · 29. Amines

A gaseous carbon compound is soluble in dilute \(\mathrm{HCl}\). The solution on treating with \(\mathrm{NaNO}_{2}\) gives off nitrogen leaving behind a solution, which smells of wood spirit. The carbon compound is

A \(\mathrm{HCHO}\)
B \(\mathrm{CO}\)
C \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NH}_{2}\)
D \(\mathrm{CH}_{3} \mathrm{NH}_{2}\)

Verified Solution

Answer & Solution

Correct Answer

(D) \(\mathrm{CH}_{3} \mathrm{NH}_{2}\)

Step-by-step Solution

Detailed explanation

The gaseous carbon compound, methyl amine \(\left(\mathrm{CH}_{3} \mathrm{NH}_{2}\right)\) is soluble in dil. \(\mathrm{HCl}\) and forms soluble hydrogen chloride salt solution. This solution on treating with \(\mathrm{NaNO}_{2}\) gives nitrogen leaving behind a methanol…

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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