323646
Suitable reagent for conversion of following reaction
1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{Ni} / \mathrm{H}_{2}\)
3 \(\mathrm{Zn} / \mathrm{Hg} / \mathrm{HCl}\)
4 Red \(\mathrm{P}+\mathrm{HI}\)
Explanation:
The suitable reagent for the conversion \(\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CHO} \xrightarrow{?} \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{OH}\) is \(\mathrm{NaBH}_{4}\). It is a selective reagent that reduces \(>\mathrm{C}=\mathrm{O}\) group to \(-\mathrm{OH}\) and does not reduce carbon-carbon double bond. Thus, unsaturated alcohols can be prepared.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323647
In the reduction \(\mathrm{R}-\mathrm{CHO}+\mathrm{H}_{2} \longrightarrow \mathrm{RCH}_{2} \mathrm{OH}\) the catalyst used is :
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd}\)
3 \(\mathrm{Pt}\)
4 Any of these
Explanation:
Any one of Ni, Pt or Pd can be used in the reduction of aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323648
The medium used in step - 1 and step - 2 are, respectively
1 acidic, basic
2 basic, acidic
3 acidic, acidic
4 basic, basic
Explanation:
Step - 1 is Clemmesen reduction, favourable in acidic medium Step - 2 is Wolff- Kishner reduction favourable in basic medium
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323649
Assertion : Mixture of benzaldehyde and acetaldehyde in hot alkaline medium gives cinnamaldehyde. Reason : Benzaldehyde is strong electrophile than acetaldehyde.
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:
Claisen-Schmidt condensation reaction. So the option (1) is correct.
323646
Suitable reagent for conversion of following reaction
1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{Ni} / \mathrm{H}_{2}\)
3 \(\mathrm{Zn} / \mathrm{Hg} / \mathrm{HCl}\)
4 Red \(\mathrm{P}+\mathrm{HI}\)
Explanation:
The suitable reagent for the conversion \(\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CHO} \xrightarrow{?} \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{OH}\) is \(\mathrm{NaBH}_{4}\). It is a selective reagent that reduces \(>\mathrm{C}=\mathrm{O}\) group to \(-\mathrm{OH}\) and does not reduce carbon-carbon double bond. Thus, unsaturated alcohols can be prepared.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323647
In the reduction \(\mathrm{R}-\mathrm{CHO}+\mathrm{H}_{2} \longrightarrow \mathrm{RCH}_{2} \mathrm{OH}\) the catalyst used is :
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd}\)
3 \(\mathrm{Pt}\)
4 Any of these
Explanation:
Any one of Ni, Pt or Pd can be used in the reduction of aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323648
The medium used in step - 1 and step - 2 are, respectively
1 acidic, basic
2 basic, acidic
3 acidic, acidic
4 basic, basic
Explanation:
Step - 1 is Clemmesen reduction, favourable in acidic medium Step - 2 is Wolff- Kishner reduction favourable in basic medium
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323649
Assertion : Mixture of benzaldehyde and acetaldehyde in hot alkaline medium gives cinnamaldehyde. Reason : Benzaldehyde is strong electrophile than acetaldehyde.
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:
Claisen-Schmidt condensation reaction. So the option (1) is correct.
323646
Suitable reagent for conversion of following reaction
1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{Ni} / \mathrm{H}_{2}\)
3 \(\mathrm{Zn} / \mathrm{Hg} / \mathrm{HCl}\)
4 Red \(\mathrm{P}+\mathrm{HI}\)
Explanation:
The suitable reagent for the conversion \(\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CHO} \xrightarrow{?} \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{OH}\) is \(\mathrm{NaBH}_{4}\). It is a selective reagent that reduces \(>\mathrm{C}=\mathrm{O}\) group to \(-\mathrm{OH}\) and does not reduce carbon-carbon double bond. Thus, unsaturated alcohols can be prepared.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323647
In the reduction \(\mathrm{R}-\mathrm{CHO}+\mathrm{H}_{2} \longrightarrow \mathrm{RCH}_{2} \mathrm{OH}\) the catalyst used is :
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd}\)
3 \(\mathrm{Pt}\)
4 Any of these
Explanation:
Any one of Ni, Pt or Pd can be used in the reduction of aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323648
The medium used in step - 1 and step - 2 are, respectively
1 acidic, basic
2 basic, acidic
3 acidic, acidic
4 basic, basic
Explanation:
Step - 1 is Clemmesen reduction, favourable in acidic medium Step - 2 is Wolff- Kishner reduction favourable in basic medium
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323649
Assertion : Mixture of benzaldehyde and acetaldehyde in hot alkaline medium gives cinnamaldehyde. Reason : Benzaldehyde is strong electrophile than acetaldehyde.
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:
Claisen-Schmidt condensation reaction. So the option (1) is correct.
323646
Suitable reagent for conversion of following reaction
1 \(\mathrm{NaBH}_{4}\)
2 \(\mathrm{Ni} / \mathrm{H}_{2}\)
3 \(\mathrm{Zn} / \mathrm{Hg} / \mathrm{HCl}\)
4 Red \(\mathrm{P}+\mathrm{HI}\)
Explanation:
The suitable reagent for the conversion \(\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CHO} \xrightarrow{?} \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{OH}\) is \(\mathrm{NaBH}_{4}\). It is a selective reagent that reduces \(>\mathrm{C}=\mathrm{O}\) group to \(-\mathrm{OH}\) and does not reduce carbon-carbon double bond. Thus, unsaturated alcohols can be prepared.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323647
In the reduction \(\mathrm{R}-\mathrm{CHO}+\mathrm{H}_{2} \longrightarrow \mathrm{RCH}_{2} \mathrm{OH}\) the catalyst used is :
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd}\)
3 \(\mathrm{Pt}\)
4 Any of these
Explanation:
Any one of Ni, Pt or Pd can be used in the reduction of aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323648
The medium used in step - 1 and step - 2 are, respectively
1 acidic, basic
2 basic, acidic
3 acidic, acidic
4 basic, basic
Explanation:
Step - 1 is Clemmesen reduction, favourable in acidic medium Step - 2 is Wolff- Kishner reduction favourable in basic medium
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323649
Assertion : Mixture of benzaldehyde and acetaldehyde in hot alkaline medium gives cinnamaldehyde. Reason : Benzaldehyde is strong electrophile than acetaldehyde.
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:
Claisen-Schmidt condensation reaction. So the option (1) is correct.
