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Question

When benzene sulphonic acid and p-nitrophenol are treated with NaHCO3, the gases released, respectively, are:

A
SO2,NO2
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B
SO2,NO
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C
SO2,CO2
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D
CO2,CO2
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Solution

The correct option is D CO2,CO2
PhSO3H+NaHCO3PhSO3Na+H2O+CO2
(I)
pNO2C6H4OH+NaHCO3pNO2C6H4ONa+H2O+CO2
(II)

Since both (I) and (II) are stronger acids than H2CO3, they are capable of evolving CO2 with NaHCO3.
HCO3+HH2O+CO2

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