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

3. Benzaldehyde can be prepared by the hydrolysis of

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

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

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

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

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

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

10. 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:

11. Trans-esterification is a reaction between:

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

13. In aldehydes and ketones the carbonyl carbon is_________

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

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

16. Schiff’s reagent is________

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

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

19. Glacial acetic acid is_______

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