Question

Which of the following alkynes can be identified and distinguished from the rest of the alkynes on reaction with ammoniacal silver nitrate to gave a white precipitate?

• A. $CH_3C \equiv C - CH_3$
• B. $CH_3CH_2C \equiv CH$
• C. $CH_3CH_2C \equiv CCH_3$
• D. $CH_3C \equiv CCH_2CH_2CH_3$

Answer 1

Answer: (B)

$CH_3CH_2C \equiv CH$

Answer 2

Only terminal alkynes react with ammoniacal silver nitrate to give white precipitate of silver acetylides.