Chemical Reactions of Aldehydes and Ketones
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323598 A substance \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) on oxidation yields compound \(\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}\) which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives \(\mathrm{C}_{4} \mathrm{H}_{8}\). The compound is

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\)
2 \(\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323599 Assertion :
Benzaldehyde is less reactive than ethanal towards nucleophilic attack.
Reason :
The \(+\mathrm{R}\) effect of phenyl group decreases the electron density on the carbon atom of group in benzaldehyde.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323600 The reactivity order of indicated functional groups towards a nucleophile is:
supporting img

1 P \(>\) Q \(>\) R
2 Q \(>\) P \(>\) R
3 Q \(>\) R \(>\) P
4 \(\mathrm{R}>\mathrm{P}>\mathrm{Q}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323601 Give the decreasing order of the following in the extent by hydration or towards nucleophilic addition reaction.
supporting img

1 IV \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) I
2 I \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) IV
3 IV \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) I
4 I \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) IV
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323602 Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), propanal (II), propanone (III), butanone (IV)

1 III \( < \) II \( < \) I \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 IV \( < \) III \( < \) II \( < \) I
4 I \( < \) II \( < \) III \( < \) IV
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323598 A substance \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) on oxidation yields compound \(\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}\) which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives \(\mathrm{C}_{4} \mathrm{H}_{8}\). The compound is

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\)
2 \(\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323599 Assertion :
Benzaldehyde is less reactive than ethanal towards nucleophilic attack.
Reason :
The \(+\mathrm{R}\) effect of phenyl group decreases the electron density on the carbon atom of group in benzaldehyde.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323600 The reactivity order of indicated functional groups towards a nucleophile is:
supporting img

1 P \(>\) Q \(>\) R
2 Q \(>\) P \(>\) R
3 Q \(>\) R \(>\) P
4 \(\mathrm{R}>\mathrm{P}>\mathrm{Q}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323601 Give the decreasing order of the following in the extent by hydration or towards nucleophilic addition reaction.
supporting img

1 IV \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) I
2 I \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) IV
3 IV \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) I
4 I \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) IV
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323602 Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), propanal (II), propanone (III), butanone (IV)

1 III \( < \) II \( < \) I \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 IV \( < \) III \( < \) II \( < \) I
4 I \( < \) II \( < \) III \( < \) IV
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323598 A substance \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) on oxidation yields compound \(\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}\) which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives \(\mathrm{C}_{4} \mathrm{H}_{8}\). The compound is

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\)
2 \(\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323599 Assertion :
Benzaldehyde is less reactive than ethanal towards nucleophilic attack.
Reason :
The \(+\mathrm{R}\) effect of phenyl group decreases the electron density on the carbon atom of group in benzaldehyde.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323600 The reactivity order of indicated functional groups towards a nucleophile is:
supporting img

1 P \(>\) Q \(>\) R
2 Q \(>\) P \(>\) R
3 Q \(>\) R \(>\) P
4 \(\mathrm{R}>\mathrm{P}>\mathrm{Q}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323601 Give the decreasing order of the following in the extent by hydration or towards nucleophilic addition reaction.
supporting img

1 IV \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) I
2 I \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) IV
3 IV \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) I
4 I \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) IV
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323602 Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), propanal (II), propanone (III), butanone (IV)

1 III \( < \) II \( < \) I \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 IV \( < \) III \( < \) II \( < \) I
4 I \( < \) II \( < \) III \( < \) IV
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323598 A substance \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) on oxidation yields compound \(\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}\) which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives \(\mathrm{C}_{4} \mathrm{H}_{8}\). The compound is

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\)
2 \(\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323599 Assertion :
Benzaldehyde is less reactive than ethanal towards nucleophilic attack.
Reason :
The \(+\mathrm{R}\) effect of phenyl group decreases the electron density on the carbon atom of group in benzaldehyde.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323600 The reactivity order of indicated functional groups towards a nucleophile is:
supporting img

1 P \(>\) Q \(>\) R
2 Q \(>\) P \(>\) R
3 Q \(>\) R \(>\) P
4 \(\mathrm{R}>\mathrm{P}>\mathrm{Q}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323601 Give the decreasing order of the following in the extent by hydration or towards nucleophilic addition reaction.
supporting img

1 IV \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) I
2 I \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) IV
3 IV \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) I
4 I \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) IV
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323602 Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), propanal (II), propanone (III), butanone (IV)

1 III \( < \) II \( < \) I \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 IV \( < \) III \( < \) II \( < \) I
4 I \( < \) II \( < \) III \( < \) IV
NEET DIGITAL LIBRARY
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323598 A substance \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) on oxidation yields compound \(\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}\) which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives \(\mathrm{C}_{4} \mathrm{H}_{8}\). The compound is

1 \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}\)
2 \(\mathrm{CH}_{3}-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
3 \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}\)
4 \(\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{2} \mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323599 Assertion :
Benzaldehyde is less reactive than ethanal towards nucleophilic attack.
Reason :
The \(+\mathrm{R}\) effect of phenyl group decreases the electron density on the carbon atom of group in benzaldehyde.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323600 The reactivity order of indicated functional groups towards a nucleophile is:
supporting img

1 P \(>\) Q \(>\) R
2 Q \(>\) P \(>\) R
3 Q \(>\) R \(>\) P
4 \(\mathrm{R}>\mathrm{P}>\mathrm{Q}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323601 Give the decreasing order of the following in the extent by hydration or towards nucleophilic addition reaction.
supporting img

1 IV \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) I
2 I \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) IV
3 IV \({\mathrm{>}}\) II \({\mathrm{>}}\) III \({\mathrm{>}}\) I
4 I \({\mathrm{>}}\) III \({\mathrm{>}}\) II \({\mathrm{>}}\) IV
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323602 Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), propanal (II), propanone (III), butanone (IV)

1 III \( < \) II \( < \) I \( < \) IV
2 II \( < \) I \( < \) III \( < \) IV
3 IV \( < \) III \( < \) II \( < \) I
4 I \( < \) II \( < \) III \( < \) IV