PU E 2026 Aldehydes and Ketones Free Quiz 1

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PU E 2026 Aldehydes and Ketones Free Quiz 1

PU E Quiz

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General 10 MCQs

1. How are aldehydes prepared?

A. Oxidation of primary alcohols B. Oxidation of secondary alcohols C. Oxidation of tertiary alcohols D. Oxidation of alkanes

2. How are ketones prepared?

A. Oxidation of primary alcohols B. Oxidation of secondary alcohols C. Oxidation of tertiary alcohols D. Oxidation of alkanes

3. What is the simplest ketone?

A. Butanone B. Pentanone C. Methanone D. Propanone (acetone)

4. What are the methods for aldehyde preparation?

A. Oxidation of primary alcohols, ozonolysis of alkenes B. Only from primary alcohols C. Only from alkanes D. Only from alkynes

5. Which is true about oxidation of aldehydes and ketones?

A. Aldehydes oxidize to carboxylic acids B. Ketones oxidize to carboxylic acids C. Both aldehydes and ketones oxidize easily D. Neither aldehydes nor ketones oxidize

6. Why are ketones resistant to oxidation?

A. They oxidize easily B. Resistant to oxidation (no H on carbonyl carbon) C. Oxidize to alcohols D. Oxidize to acids

7. What are aldehydes and ketones reduced to?

A. Aldehydes to ketones, ketones to aldehydes B. Aldehydes to aldehydes, ketones to ketones C. Aldehydes to primary alcohols, ketones to secondary alcohols D. Both to alkanes

8. What is formed by the reduction of propanal?

A. Propan-2-ol B. Propanone C. Propanoic acid D. Propan-1-ol

9. What type of reaction do aldehydes and ketones undergo?

A. Nucleophilic addition B. Electrophilic addition C. Free radical addition D. Elimination

10. What is formed when HCN adds to aldehydes and ketones?

A. Alcohols B. Cyanohydrins C. Acids D. Alkanes

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