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Aldehydes, Ketones and Carboxylic Acids

Short Answer Type

341. What is meant by the following terms? Give an example of the reaction in each case.
Hemiacetal

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342. What is meant by the following terms? Give an example of the reaction in each case.
Oxime

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343. What is meant by the following terms? Give an example of the reaction in each case.
Ketal

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344. What is meant by the following terms? Give an example of the reaction in each case.
Imine

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345. What is meant by the following terms? Give an example of the reaction in each case.
2, 4-DNP-derivative

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346. What is meant by the following terms? Give an example of the reaction in each case.

Schiff’s base

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347. Explain the following:
Aldehydes are more reactive than the isomeric ketones.

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348. Explain the following:

Acetaldehyde, CH₃CHO, does not undergo Cannizzaro reaction.

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349. Explain the following:
Aldehydes undergo oxidation more readily than the ketones.

Oxidation of aldehydes involves cleavage of carbon-hydrogen bond and that of ketones involves cleavage of much higher carbon-carbon bond. Thus, aldehyde undergo oxidation more readily than the ketones.

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350. Explain the following:

Hydrazones of aldehydes and ketones are not prepared in highly acidic medium.

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Previous Year Papers

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Test Yourself

Short Answer Type

349. Explain the following:Aldehydes undergo oxidation more readily than the ketones.

349. Explain the following:
Aldehydes undergo oxidation more readily than the ketones.