323474
Assertion : \(\alpha\)-Hydrogen atoms in aldehydes and ketones are acidic. Reason : The anion left after the removal of \(\alpha\)-hydrogen is stabilised by inductive effect.
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.
Explanation:
Removal of \(\alpha-\mathrm{H}\) from aldehydes and ketones forms an anion, which is stabilized through resonance. Acidity in carbonyl compounds is attributed to the electronwithdrawing effect of the carbonyl group and conjugate base stabilization. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323475
Consider the following reaction :
The correct statement for product B is ______ . It is
1 optically active and adds one mole of bromine.
2 optically active alcohol and is neutral.
3 racemic mixture and gives a gas with saturated \(\mathrm{NaHCO}_{3}\) solution.
4 racemic mixture and is neutral.
Explanation:
First step is aldol condensation reaction.Then nucleophilic addition of \(\mathrm{CN}^{\ominus}\), followed by hydrolysis gives a racemic mixture of unsaturated hydroxy acid.
JEE - 2023
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323476
\({\text{2C}}{{\text{H}}_{\text{3}}}{\text{COC}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ dry HCl}}}}{\text{' X '}}\). ' \(\mathrm{X}\) ' is:
1 Mesityl oxide
2 Diacetone alcohol
3 Acetic acid
4 Mesitylene
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323477
Which is the most suitable reagent for the following conversion?
1 Tollen's reagent
2 Benzoyl peroxide
3 \(\mathrm{I}_{2}\) and \(\mathrm{NaOH}\) solution
4 \(\mathrm{Sn}\) and \(\mathrm{NaOH}\) solution
Explanation:
Iodoform test is used to test presence of \(-\mathrm{COCH}_{3}\) group which is converted into \(-\mathrm{COOH}\) group. The reaction is shown as
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323474
Assertion : \(\alpha\)-Hydrogen atoms in aldehydes and ketones are acidic. Reason : The anion left after the removal of \(\alpha\)-hydrogen is stabilised by inductive effect.
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.
Explanation:
Removal of \(\alpha-\mathrm{H}\) from aldehydes and ketones forms an anion, which is stabilized through resonance. Acidity in carbonyl compounds is attributed to the electronwithdrawing effect of the carbonyl group and conjugate base stabilization. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323475
Consider the following reaction :
The correct statement for product B is ______ . It is
1 optically active and adds one mole of bromine.
2 optically active alcohol and is neutral.
3 racemic mixture and gives a gas with saturated \(\mathrm{NaHCO}_{3}\) solution.
4 racemic mixture and is neutral.
Explanation:
First step is aldol condensation reaction.Then nucleophilic addition of \(\mathrm{CN}^{\ominus}\), followed by hydrolysis gives a racemic mixture of unsaturated hydroxy acid.
JEE - 2023
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323476
\({\text{2C}}{{\text{H}}_{\text{3}}}{\text{COC}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ dry HCl}}}}{\text{' X '}}\). ' \(\mathrm{X}\) ' is:
1 Mesityl oxide
2 Diacetone alcohol
3 Acetic acid
4 Mesitylene
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323477
Which is the most suitable reagent for the following conversion?
1 Tollen's reagent
2 Benzoyl peroxide
3 \(\mathrm{I}_{2}\) and \(\mathrm{NaOH}\) solution
4 \(\mathrm{Sn}\) and \(\mathrm{NaOH}\) solution
Explanation:
Iodoform test is used to test presence of \(-\mathrm{COCH}_{3}\) group which is converted into \(-\mathrm{COOH}\) group. The reaction is shown as
323474
Assertion : \(\alpha\)-Hydrogen atoms in aldehydes and ketones are acidic. Reason : The anion left after the removal of \(\alpha\)-hydrogen is stabilised by inductive effect.
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.
Explanation:
Removal of \(\alpha-\mathrm{H}\) from aldehydes and ketones forms an anion, which is stabilized through resonance. Acidity in carbonyl compounds is attributed to the electronwithdrawing effect of the carbonyl group and conjugate base stabilization. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323475
Consider the following reaction :
The correct statement for product B is ______ . It is
1 optically active and adds one mole of bromine.
2 optically active alcohol and is neutral.
3 racemic mixture and gives a gas with saturated \(\mathrm{NaHCO}_{3}\) solution.
4 racemic mixture and is neutral.
Explanation:
First step is aldol condensation reaction.Then nucleophilic addition of \(\mathrm{CN}^{\ominus}\), followed by hydrolysis gives a racemic mixture of unsaturated hydroxy acid.
JEE - 2023
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323476
\({\text{2C}}{{\text{H}}_{\text{3}}}{\text{COC}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ dry HCl}}}}{\text{' X '}}\). ' \(\mathrm{X}\) ' is:
1 Mesityl oxide
2 Diacetone alcohol
3 Acetic acid
4 Mesitylene
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323477
Which is the most suitable reagent for the following conversion?
1 Tollen's reagent
2 Benzoyl peroxide
3 \(\mathrm{I}_{2}\) and \(\mathrm{NaOH}\) solution
4 \(\mathrm{Sn}\) and \(\mathrm{NaOH}\) solution
Explanation:
Iodoform test is used to test presence of \(-\mathrm{COCH}_{3}\) group which is converted into \(-\mathrm{COOH}\) group. The reaction is shown as
323474
Assertion : \(\alpha\)-Hydrogen atoms in aldehydes and ketones are acidic. Reason : The anion left after the removal of \(\alpha\)-hydrogen is stabilised by inductive effect.
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.
Explanation:
Removal of \(\alpha-\mathrm{H}\) from aldehydes and ketones forms an anion, which is stabilized through resonance. Acidity in carbonyl compounds is attributed to the electronwithdrawing effect of the carbonyl group and conjugate base stabilization. So the option (3) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323475
Consider the following reaction :
The correct statement for product B is ______ . It is
1 optically active and adds one mole of bromine.
2 optically active alcohol and is neutral.
3 racemic mixture and gives a gas with saturated \(\mathrm{NaHCO}_{3}\) solution.
4 racemic mixture and is neutral.
Explanation:
First step is aldol condensation reaction.Then nucleophilic addition of \(\mathrm{CN}^{\ominus}\), followed by hydrolysis gives a racemic mixture of unsaturated hydroxy acid.
JEE - 2023
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323476
\({\text{2C}}{{\text{H}}_{\text{3}}}{\text{COC}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{ dry HCl}}}}{\text{' X '}}\). ' \(\mathrm{X}\) ' is:
1 Mesityl oxide
2 Diacetone alcohol
3 Acetic acid
4 Mesitylene
Explanation:
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323477
Which is the most suitable reagent for the following conversion?
1 Tollen's reagent
2 Benzoyl peroxide
3 \(\mathrm{I}_{2}\) and \(\mathrm{NaOH}\) solution
4 \(\mathrm{Sn}\) and \(\mathrm{NaOH}\) solution
Explanation:
Iodoform test is used to test presence of \(-\mathrm{COCH}_{3}\) group which is converted into \(-\mathrm{COOH}\) group. The reaction is shown as
