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  4. Which among the following compounds will not give effervescence with sodium bicarbonate?

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Q. Which among the following compounds will not give effervescence with sodium bicarbonate?

Alcohols Phenols and Ethers

Solution:

Phenol does not react with $NaHCO _3$ or $Na _2 CO _3$. Although picric acid is a phenolic compound $(2,4,6$ - trinitrophenol), due to the presence of $3 NO _2$ group (EWG), it is highly acidic and reacts with $NaHCO _3$ or $Na _2 CO _3$