Which gas will be evolved when $[C H_{3} C H_{2} N H_{2} + {(C H_{3})}_{2} C H N H_{2}]$ is treated with sodium nitrite and $H C l$ ?

Chlorine

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Ammonia

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Nitrogen

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N O_{2}

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Solution

The correct option is C Nitrogen
Primary amine reacts with nitrous acid (obtained from sodium nitrite and HCl) to form primary alcohol along with evolution of nitrogen gas.
$C H_{3} C H_{2} N H_{2} + (C H_{3})_{2} C H N H_{2} + H N O_{2} N a N O_{2} + H C l - ------- \to 273 - 278 K$
$C H_{3} C H_{2} O H + (C H_{3})_{2} C H O H + H_{2} O + N_{2} ↑$

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