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Solution


Q.

The compounds which give positive Fehling’s test are:               [2025]

Choose the correct answer from the options given below:
1 (A), (D) and (E) only  
2 (C), (D) and (E) only  
3 (A), (B) and (C) only  
4 (A), (C) and (D) only  

Ans.

(2)

Fehling’s test is given by those aldehydes which have α–hydrogen atom. Benzaldehyde (A) has no α–hydrogen atom, hence does not give Fehling’s test. Acetophenone (B) is a ketone and ketones do not give Fehling’s test. (D) and (E) are aldehydes with α–hydrogen atom and C tautomerises to an aldehyde.

Thus C, D and E give positive Fehling’s test.