When benzene sulphonic acid and $p$ -nitrophenol are treated with $N a H C O_{3}$ , the gases released respectively are:

S O_{2}, N O_{2}

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S O_{2}, N O

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S O_{2}, C O_{2}

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C O_{2}, C O_{2}

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Solution

The correct option is D $C O_{2}, C O_{2}$

Because benzene sulphonic acid and p-nitrophenol are stronger acids with $H_{2} C O_{3}$ i.e. ( $H_{2} O + C O_{2}$ ), So they are capable to evolve $C O_{2}$ with $N a H C O_{3}$ .
Option D is correct.

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