Question
Question: Propyne and propene can be distinguished by :...
Propyne and propene can be distinguished by :
A
Conc. H2SO4
B
Br2 in CCl4
C
Dil. KMnO4
D
AgNO3 in ammonia
Answer
AgNO3 in ammonia
Explanation
Solution
Terminal alkyne gives white ppt with ammonical silver nitrate.
CH3 —C ŗ CH + NH3 + AgNO3 ® CH3 —C ŗ C. Ag + NH4NO3
white ppt.