A primary aliphatic amine on reaction with nitrous acid in cold 273 K and there after raising temperature of reaction mixture to room temperature 298 K , gives a/an

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A primary aliphatic amine on reaction with nitrous acid in cold gives a diazonium salt, but diazonium salt of aliphatic amines are not much stable, so, they dissociate on increasing temperature slightly and gives alcohol with water.

$R - {NH}_{2} \to_{273 ° C}^{{HNO}_{2} (aq)} {RN}_{2}^{+} \to_{H_{2} O}^{283 ° C} R - OH + N_{2}$

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