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

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

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

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

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

5. In aldehydes and ketones the carbonyl carbon is_________

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

7. Glacial acetic acid is_______

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

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

10. Trans-esterification is a reaction between:

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

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

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

14. Benzaldehyde can be prepared by the hydrolysis of

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

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

17. Schiff’s reagent is________

18. 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:

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

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