Which gives nucleophilic addition most easily?

Important Questions on Aldehydes, Ketones and Carboxylic Acids

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 77

Which of the following is most reactive towards nucleophilic addition reactions?

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 78

${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}\stackrel{\mathrm{HCN}}{⟶}\mathrm{X}\stackrel{{\mathrm{H}}^{+}/{\mathrm{H}}_2\mathrm{O}}{⟶}\mathrm{Y}$
In the above sequence, $\mathrm{Y}$ is:

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 79

Which of the following forms a stable hydrate?

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 80

The structure of the addition product formed when acetone reacts with a concentrated aqueous solution of sodium bisulphite is:

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 81

Aldehydes react with alcohols in presence of dry $\mathrm{HCl}$ gas to form:

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 82

Oximes are formed by the reaction of aldehydes and ketones with:

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 83

The compound which does not react with hydroxyl amine is:

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Alpha Question Bank for Medical: Chemistry>Chapter 25 - Aldehydes, Ketones and Carboxylic Acids>Exercise 1>Q 84

The structure for acetaldehyde semicarbazone is: