Which of the following amine(s) show(s) positive carbylamines test?

(A) Aniline ()

(B)

(C)

(D)

(E) N-methylaniline ()

Choose the correct answer from the options given below:

Question

Which of the following amine(s) show(s) positive carbylamines test?

(A) Aniline ()

(B)

(C)

(D)

(E) N-methylaniline ()

Choose the correct answer from the options given below:

Canvas Classes · Accepted Answer

Step 1: Recall the carbylamine (isocyanide) test

The carbylamine test is positive only for primary amines (1° amines — both aliphatic and aromatic).

Reaction: Primary amine +  + alc. KOH → isocyanide (foul smell)

Step 2: Classify each amine

| Amine | Type | Test |
|---|---|---|
| (A) Aniline  | 1° aromatic | ✓ Positive |
| (B)  | 2° aliphatic | ✗ Negative |
| (C)  | 1° aliphatic | ✓ Positive |
| (D)  | 3° aliphatic | ✗ Negative |
| (E)  | 2° aromatic | ✗ Negative |

Step 3: Conclusion

Onl

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