PU M 2026 Aldehydes and Ketones Free Quiz 2

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PU M 2026 Aldehydes and Ketones Free Quiz 2

PU M Quiz

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Remaining: 7

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General 7 MCQs

11. What is formed when NaHSO3 adds to aldehydes and ketones?

A. Alcohols B. Acids C. Bisulfite addition compounds D. Alkanes

12. What is formed when aldehydes react with 2,4-DNP?

A. Alcohols B. Acids C. Ketones D. Hydrazones (orange or red precipitate)

13. Which compounds give a positive 2,4-DNP test?

A. Both aldehydes and ketones B. Only aldehydes C. Only ketones D. Neither

14. Which compound gives Fehling test?

A. Ketones give Fehling test B. Aldehydes give Fehling test (red precipitate) C. Both give Fehling test D. Neither gives Fehling test

15. How does Tollens test distinguish aldehydes from ketones?

A. Both aldehydes and ketones give positive Tollens test B. Neither gives positive Tollens test C. Aldehydes give positive Tollens test, ketones do not D. Ketones give positive Tollens test, aldehydes do not

16. How does Fehling test distinguish aldehydes from ketones?

A. Both give positive Fehling test B. Neither gives positive Fehling test C. Ketones give positive Fehling test, aldehydes do not D. Aldehydes give positive Fehling test, ketones do not

17. Which gives a positive Tollens test, acetaldehyde or acetone?

A. Acetaldehyde gives positive Tollens test B. Acetone gives positive Tollens test C. Both give positive Tollens test D. Neither gives Tollens test

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