Question

Assertion (A): 1-Bromopentane reacts with AgCN to give pentyl isocyanide.
Reason (R): AgCN is mainly ionic in nature.

• A. A is true, R is true and R is the correct explanation of A
• B. A is true, R is true but R is not correct explanation of A
• C. A is true, R is false
• D. A is false, R is true

Hint:

AgCN is covalent and forms isocyanides, while KCN (ionic) gives cyanides (CN group).

Answer 1

The Correct Option is C

- Assertion is true: \( \text{C}_5\text{H}_{11}\text{Br} + \text{AgCN} \rightarrow \text{C}_5\text{H}_{11}\text{NC} \)
AgCN forms isocyanide (NC) due to covalent character of Ag–C bond, which favors bonding through nitrogen.
- Reason is false: AgCN is not mainly ionic; it's largely covalent due to the poor solubility and the nature of silver ion.
Hence, A is true, R is false.