Chemistry - GOC Question with Solution | TestHub
ChemistryGOCAcid BaseEasy2 minQB
ChemistryEasysingle choice
Which gas is evolved in the following reaction?
4-nitrophenol + NaHCO₃ sodium 4-nitrophenoxide + gas
Options:
Answer:
C
Solution:
The para nitro group stabilises the phenoxide by resonance, making 4-nitrophenol acidic enough (pKa ≈ 7.2) to react with bicarbonate; the carbonic acid formed decomposes, and the escape of CO₂ gas pulls the equilibrium forward.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:Acid Base
⏱ 2mℹ️ Source: QB
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