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Solution


Q.

Phenolic group can be identified by a positive:                   [2024]
1 Phthalein dye test  
2 Lucas test  
3 Tollen's test  
4 Carbylamine test  

Ans.

(1)

Phthalein dye test is a test for phenolic group. For example phenol condense with phthalic anhydride in the presence of concentrated H2SO4 to give phenolphthalein which gives a dark pink color with NaOH solution.