Hydrocarbons Question 76

Question: Acetylene gives [CPMT 1985]

Options:

A) White precipitate with $ AgNO_3 $ and red precipitate with $ Cu_2Cl_2 $

B) White precipitate with $ Cu_2Cl_2 $ and red precipitate with $ AgNO_3 $

C) White precipitate with both the reagents

D) Red precipitate with both the reagents

Show Answer

Answer:

Correct Answer: A

Solution:

$ CH_3\equiv CH+\underset{\text{(Ammonical)}}{\mathop{AgNO_3}}\to \underset{\text{White ppt}\text{.}}{\mathop{Ag-C\equiv C-Ag}} $

$ CH_3\equiv CH+\underset{\text{(Ammonical)}}{\mathop{CuCl_2}}\to \underset{\text{Red ppt}\text{.}}{\mathop{Cu-C\equiv C-Cu}} $