1.

Which one of the following pairs will gives effervescence with aq. NaHCO_(3)? underset((I))(CH_(3)COCl)""underset((II))(CH_(3)COCH_(3)) underset((III))(CH_(3)COOCH_(3))""underset((IV))(CH_(3)COOCOCH_(3))

Answer»

I & II
I & IV
II & III
I & III

Solution :Acid chloride and acid anhydride are extremely REACTIVE out of acid derivatives. They react independently with water even in the absence of CATALYST to give carboxylic acid, which will ultimately reacts with `NaHCO_(3)` to give sodium salt of acid and `CO_(2)`. Ester reacts with water in presence of acid catalyst to produce acid. Acetone is inert toward `NaHCO_(3)` solution.


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