Mark the incorrect statement about Aldehydes and Ketones:
Correct answer: D. none
- A. Aldehydes on reduction with NaBH4/H3O+ give 1o alcohol
- B. Ketones on reduction with NaBH4/H3O+ give 2o alcohol
- C. Aldehydes on reduction with N2H4/KOH gives alkane
- D. none
Explanation
The correct answer is 'none' because all of the given statements about the reduction of aldehydes and ketones are accurate. Option A describes the reduction of aldehydes to primary alcohols, which is a standard reaction using NaBH4. Option B explains the reduction of ketones to secondary alcohols with NaBH4, another common transformation. Option C pertains to the Wolff-Kishner reduction, which is a well-established method to convert aldehydes and ketones into alkanes using hydrazine and potassium hydroxide. Therefore, none of the statements are incorrect.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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679 free Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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