Aldehydes, Ketones and Carboxylic Acids Class 12 MCQs Questions with Answers

1. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives:

2. Which compound is obtained when acetaldehydes are treated with dilute solution of caustic soda?

3. Which of the following cannot reduce Fehling’s solution?

4. Which one the following can be oxidized to the corresponding carbonyl compound?

5. Compound ‘A’ C5H10O forms a phenyl hydrazone and gives a negative Tollen’s reagent test and iodoform test. On reduction with Zn+Hg/HCl, compound A gives n-pentane. The compound ‘A’ is:

6. Which of the following has the most acidic hydrogen?

7. Which of the following will not give aldol condensation?

8. Schiff’s reagent is________

9. Benzaldehyde can be prepared by the hydrolysis of

10. Formic acid and acetic acid are distinguished by reaction with:

11. Which of the following does not answer iodoform test?

12. In aldehydes and ketones the carbonyl carbon is_________

13. Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives:

14. The formation of cyanohydrin from a ketone is an example of:

15. Trans-esterification is a reaction between:

16. Glacial acetic acid is_______

17. An inorganic compound producing an organic compound on heating is:

18. Which one of the following is not a derivative carboxylic acid?

19. CH3CHO and C6H5 CH2CHO can be distinguished chemically by:

20. The polar nature of carbonyl group in aldehydes and ketones is due to____________