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

1. 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:

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

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

4. Glacial acetic acid is_______

5. Trans-esterification is a reaction between:

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

7. Benzaldehyde can be prepared by the hydrolysis of

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

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

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

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

12. Schiff’s reagent is________

13. In aldehydes and ketones the carbonyl carbon is_________

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

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

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

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

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

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

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