1.

Give chemical teststo distinguish between the following pairs of compounds: (a) Phenol and Benzoic acid (b) Benzaldehyde and Acetophenone.

Answer»

Solution :Distinction between pairs of compounds can be made as under:
(a. Add neutral ferric chloride. Phenol will GIVE VIOLET colour whereras benzoic acid will not.
b. Add `I_(2)` and NAOH. Acetophenone `(C_(6)H_(5)COCH_(3))` gives yellow ppt of iodoform whereas benzaldehyde `(C_(6)H_(5)CHO)` does not.


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