Question

Which of the following pairs is/are correctly matched?

Reaction		Prodinct
I	$RX +AfCN$	$RNC$
II	$RX + KCN$	$RCN$
III	$RX +KNO_{2}$
IV	$RX +AgNO_{2}$	$R- O- N=O$

Select the correct answer using the codes given below

• A. I alone
• B. I and II
• C. III and IV
• D. I, II, III and IV

Answer 1

Answer: (B)

Alkali metal nitrites $\left(K N O_{2}\right)$ being ionic, gives alkyl nitrites when reacts with $RX$.
$R X+K N O \rightarrow \underset{\text { alkyl nitrite }}{R O N}=O+N a X$
However, silver nitrite being covalent, when reacts with RX gives nitroalkane.
$R X+A g N O_{2} \rightarrow \underset{\text { nitroalkane }}{R N O_{2}}+A g X$