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

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

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

3. Benzaldehyde can be prepared by the hydrolysis of

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

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

6. Trans-esterification is a reaction between:

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

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

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

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

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

12. Glacial acetic acid is_______

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

14. 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:

15. In aldehydes and ketones the carbonyl carbon is_________

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

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

18. Schiff’s reagent is________

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

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