Question

The hydrocarbon which does decolourise alkaline $KMnO_{4}$ solution and also does not give any precipitate with ammoniacal silver nitrate is

• A. benzene
• B. acetylene
• C. propyne
• D. butyne-1

Answer 1

Answer: (A)

benzene

Answer 2

Benzene is resonance stabilised and hence does not react with alk. $KMnO _{4}$ and it has no acidic hydrogen. Therefore, it does not react with ammoniacal $AgNO _{3}$ solution.