What is the action of mixture of $N a N O_{2}$ and dil. $H C l$ on
(a) Ethyl amine, (b) Aniline, (c) Diethyl amine
How is nylon 6, 6 prepared?
What are 'antacids'?
Write any 'two' side effects of tranquilizers.

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Solution

The action of mixture of $N a N O_{2}$ and dil. $H C l$ on
(a) $E t h y l a m i n e$
$E t h y l a m i n e$ reacts with a mixture of $N a N O_{2}$ and dil. $H C l$ to form $e t h y l a l c o h o l$ , $w a t e r$ and $n i t r o g e n$ gas.
$C_{2} H_{5} - N H_{2} + H N O_{2} 273 - 278 K - ----- \to C_{2} H_{5} - O H + H_{2} O + N_{2} ↑$

(b) $A n i l i n e$
$A n i l i n e$ reacts with a mixture of $N a N O_{2}$ and dil. $H C l$ to form $b e n z e n e d i a z o n i u m c h l o r i d e$ , $w a t e r$ and $N a C l$ .
$P h - N H_{2} + N a N O_{2} + 2 H C l 273 - 278 K - ----- \to P h - N_{2}^{+} C l^{-} + 2 H_{2} O + N a C l$
(c) $D i e t h y l a m i n e$
$D i e t h y l a m i n e$ reacts with a mixture of $N a N O_{2}$ and dil. $H C l$ to form $N - n i t r o s o d i e t h y l a m i n e$ and $w a t e r$
$(C_{2} H_{5})_{2} - N H + H N O_{2} 273 - 278 K - ----- \to (C_{2} H_{5})_{2} - N - N = O + H_{2} O$
Preparation of $n y l o n 6, 6$ :
$ϵ - C a p r o l a c t u m$ is heated at 533 K in an inert atmosphere. It polymerises to form $n y l o n - 6$ .
$ϵ - C a p r o l a c t u m 533 K - -- \to N_{2} - [C O (C H_{2})_{5} -) N H -]_{n}$
'Antacid': A base that neutralizes excess of acid in stomach. For example, $s o d i u m b i c a r b o n a t e$ , $m a g n e s i u m h y d r o x i d e$ and $a l u m i n i u m h y d r o x i d e$ .

The side effects of tranquilizers include headache, weight gain.

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