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

323496 Statement A :
The below reaction (Fig A) is an example of electrophilic substitution reaction
Statement B :
Carbonyl group acts as a deactivitating and meta-directing group.
supporting img

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323497 Assertion :
Aromatic aldehydes are less reactive than aliphatic aldehyde towards nucleophilic addition reaction.
Reason :
In case of aromatic aldehyde, steric hinderance and -I. Effect of phenyl ring is present.

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

323498 Assertion :
Aldol condensation can be catalysed both by acids and bases.
Reason :
\(\beta - \) Hydroxy aldehydes or ketones readily undergo acid catalysed dehydration.

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

323499 Addition of alcohols to aldehydes and ketones takes place in presence of dry \(\mathrm{HCl}\) gas because it
(i) Protonates the oxygen of the carbonyl compounds
(ii) Increase the electrophilicity of the carbonyl carbon
(iii) Removes the excess moisture from the reaction
(iv) Helps the reaction to move in the forward direction

1 (i), (ii) and (iv)
2 (i), (ii), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (iii) and (iv)
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323496 Statement A :
The below reaction (Fig A) is an example of electrophilic substitution reaction
Statement B :
Carbonyl group acts as a deactivitating and meta-directing group.
supporting img

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323497 Assertion :
Aromatic aldehydes are less reactive than aliphatic aldehyde towards nucleophilic addition reaction.
Reason :
In case of aromatic aldehyde, steric hinderance and -I. Effect of phenyl ring is present.

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

323498 Assertion :
Aldol condensation can be catalysed both by acids and bases.
Reason :
\(\beta - \) Hydroxy aldehydes or ketones readily undergo acid catalysed dehydration.

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

323499 Addition of alcohols to aldehydes and ketones takes place in presence of dry \(\mathrm{HCl}\) gas because it
(i) Protonates the oxygen of the carbonyl compounds
(ii) Increase the electrophilicity of the carbonyl carbon
(iii) Removes the excess moisture from the reaction
(iv) Helps the reaction to move in the forward direction

1 (i), (ii) and (iv)
2 (i), (ii), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (iii) and (iv)
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323496 Statement A :
The below reaction (Fig A) is an example of electrophilic substitution reaction
Statement B :
Carbonyl group acts as a deactivitating and meta-directing group.
supporting img

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323497 Assertion :
Aromatic aldehydes are less reactive than aliphatic aldehyde towards nucleophilic addition reaction.
Reason :
In case of aromatic aldehyde, steric hinderance and -I. Effect of phenyl ring is present.

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

323498 Assertion :
Aldol condensation can be catalysed both by acids and bases.
Reason :
\(\beta - \) Hydroxy aldehydes or ketones readily undergo acid catalysed dehydration.

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

323499 Addition of alcohols to aldehydes and ketones takes place in presence of dry \(\mathrm{HCl}\) gas because it
(i) Protonates the oxygen of the carbonyl compounds
(ii) Increase the electrophilicity of the carbonyl carbon
(iii) Removes the excess moisture from the reaction
(iv) Helps the reaction to move in the forward direction

1 (i), (ii) and (iv)
2 (i), (ii), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (iii) and (iv)
For More Updates join with Us
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323496 Statement A :
The below reaction (Fig A) is an example of electrophilic substitution reaction
Statement B :
Carbonyl group acts as a deactivitating and meta-directing group.
supporting img

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323497 Assertion :
Aromatic aldehydes are less reactive than aliphatic aldehyde towards nucleophilic addition reaction.
Reason :
In case of aromatic aldehyde, steric hinderance and -I. Effect of phenyl ring is present.

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

323498 Assertion :
Aldol condensation can be catalysed both by acids and bases.
Reason :
\(\beta - \) Hydroxy aldehydes or ketones readily undergo acid catalysed dehydration.

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

323499 Addition of alcohols to aldehydes and ketones takes place in presence of dry \(\mathrm{HCl}\) gas because it
(i) Protonates the oxygen of the carbonyl compounds
(ii) Increase the electrophilicity of the carbonyl carbon
(iii) Removes the excess moisture from the reaction
(iv) Helps the reaction to move in the forward direction

1 (i), (ii) and (iv)
2 (i), (ii), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (iii) and (iv)