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Standard XII

Chemistry

Reaction with Diazonium Salts

A colourless ...

Question

A colourless liquid $A (b . p 184^{\circ} C)$ is sparingly soluble in warm water to which it gives feebly alkaline reaction on treating with $N a N O_{2} a n d d i l H C l$ in the cold solution, it yields a solution which reacts with an alkaline solution of $β -$ napthol to give an orange yellow precipitate. Compound $A$ is :

C_{6} H_{5} N_{2} C l

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C_{6} H_{5} N H N H_{2}

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n - C_{4} H_{9} N H_{2}

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C_{6} H_{5} N H_{2}

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Solution

The correct option is D $C_{6} H_{5} N H_{2}$
Aniline is the colourless liquid A having boiling point $184^{o} C$ .
On treatment with $N a N O_{2} a n d d i l H C l$ at low temperature, it forms benzne diazonum salt.
The diazonium salt reacts with napthol in alkaline medium to form azo dye which is n orange yellow precipitate.

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A colourless liquid A(b.p184∘C) is sparingly soluble in warm water to which it gives feebly alkaline reaction on treating with NaNO2anddilHCl in the cold solution, it yields a solution which reacts with an alkaline solution of β−napthol to give an orange yellow precipitate. Compound A is :

The correct option is D C6H5NH2Aniline is the colourless liquid A having boiling point 184oC.On treatment with NaNO2anddilHCl at low temperature, it forms benzne diazonum salt.The diazonium salt reacts with napthol in alkaline medium to form azo dye which is n orange yellow precipitate.