Organic Chemistry Multiple Choice Questions and Answers

1 The oxidation of toluene to benzaldehyde by chromyl chloride is called as which of the following?

A Cannizzaro reaction

B Wurtz reaction

C Etard reaction

D Reimer-Tiemann reaction

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Answer:Etard reaction

2 Benzaldehyde can be prepared by oxidation of toluene by which of the following reagent?

A Acidic KMnO₄

B K₂Cr₂O₇

C CrO₂Cl₂

D basic KMnO₄

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Answer: CrO₂Cl₂

3 The oxidation of benzyl chloride with lead nitrate gives which of the following compound?

A Benzaldehyde

B Benzyl alcohol

C Benzoic acid

D p-chlorobenzaldehyde

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Answer: Benzaldehyde

4 Which of the following is the commercial method of preparation of benzaldehyde?

A Oxidation of toluene

B Oxidation of benzyl chloride

C Oxidation of benzyl alcohol

D Etard reaction

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Answer: Oxidation of benzyl alcohol

5 Which of the following is the not a method of preparation of benzaldehyde?

A Gattermann Koch synthesis

B Etards reaction

C Stephan’s reaction

D Oxidation of secondary alcohol

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Answer: Oxidation of secondary alcohol

6 What reagents will be used in the preparation of benzaldehyde via Gattermann Koch synthesis?

A Carbon dioxide and HCl

B Carbon monoxide and HCl

C Oxygen and H₂SO₄

D Carbon monoxide and H₂SO₄

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Answer:Carbon monoxide and HCl

7 Partial reduction of phenyl cyanide with stannous chloride and passing dry HCl gas in ether solution followed by hydrolysis of the aldimine stannic chloride with water to form benzaldehyde is called as which of the following method of preparation of benzaldehyde?

A Gattermann Koch synthesis

B Etards reaction

C Stephan’s reaction

D Gattermann reaction

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