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

323611 Identify compound A from the following reaction.
\({\text{A + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgBr}}\xrightarrow[{{\text{ ether }}}]{{{\text{dry}}}}{\text{B}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}\)
3- Methylpentan-3-ol

1 Butanal
2 Propanone
3 Propanal
4 Butanone
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323612 Which of the following compound is highly reactive towards \(\mathrm{HCN}\) ?

1 \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CHO}\)
2 \(\mathrm{H}-\mathrm{CHO}\)
3 \(\mathrm{CH}_{3}-\mathrm{CHO}\)
4 \(\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323613 What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?

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

323614 Aldehydes or ketones react with semicarbazide to form corresponding semicarbazone. At what \(\mathrm{pH}\) this reaction is favoured?

1 \(3.5-4\)
2 \(4.5-5.5\)
3 \(5.5-6.5\)
4 \(6.5-7.5\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323615 Assertion :
Halogen acids do not add on to carbonyl bond.
Reason :
Addition depends upon the polarisation of HX and carbonyl bond.

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

323611 Identify compound A from the following reaction.
\({\text{A + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgBr}}\xrightarrow[{{\text{ ether }}}]{{{\text{dry}}}}{\text{B}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}\)
3- Methylpentan-3-ol

1 Butanal
2 Propanone
3 Propanal
4 Butanone
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323612 Which of the following compound is highly reactive towards \(\mathrm{HCN}\) ?

1 \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CHO}\)
2 \(\mathrm{H}-\mathrm{CHO}\)
3 \(\mathrm{CH}_{3}-\mathrm{CHO}\)
4 \(\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323613 What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?

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

323614 Aldehydes or ketones react with semicarbazide to form corresponding semicarbazone. At what \(\mathrm{pH}\) this reaction is favoured?

1 \(3.5-4\)
2 \(4.5-5.5\)
3 \(5.5-6.5\)
4 \(6.5-7.5\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323615 Assertion :
Halogen acids do not add on to carbonyl bond.
Reason :
Addition depends upon the polarisation of HX and carbonyl bond.

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

323611 Identify compound A from the following reaction.
\({\text{A + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgBr}}\xrightarrow[{{\text{ ether }}}]{{{\text{dry}}}}{\text{B}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}\)
3- Methylpentan-3-ol

1 Butanal
2 Propanone
3 Propanal
4 Butanone
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323612 Which of the following compound is highly reactive towards \(\mathrm{HCN}\) ?

1 \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CHO}\)
2 \(\mathrm{H}-\mathrm{CHO}\)
3 \(\mathrm{CH}_{3}-\mathrm{CHO}\)
4 \(\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323613 What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?

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supporting img


supporting img


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

323614 Aldehydes or ketones react with semicarbazide to form corresponding semicarbazone. At what \(\mathrm{pH}\) this reaction is favoured?

1 \(3.5-4\)
2 \(4.5-5.5\)
3 \(5.5-6.5\)
4 \(6.5-7.5\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323615 Assertion :
Halogen acids do not add on to carbonyl bond.
Reason :
Addition depends upon the polarisation of HX and carbonyl bond.

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

323611 Identify compound A from the following reaction.
\({\text{A + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgBr}}\xrightarrow[{{\text{ ether }}}]{{{\text{dry}}}}{\text{B}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}\)
3- Methylpentan-3-ol

1 Butanal
2 Propanone
3 Propanal
4 Butanone
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323612 Which of the following compound is highly reactive towards \(\mathrm{HCN}\) ?

1 \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CHO}\)
2 \(\mathrm{H}-\mathrm{CHO}\)
3 \(\mathrm{CH}_{3}-\mathrm{CHO}\)
4 \(\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323613 What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?

supporting img


supporting img


supporting img


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

323614 Aldehydes or ketones react with semicarbazide to form corresponding semicarbazone. At what \(\mathrm{pH}\) this reaction is favoured?

1 \(3.5-4\)
2 \(4.5-5.5\)
3 \(5.5-6.5\)
4 \(6.5-7.5\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323615 Assertion :
Halogen acids do not add on to carbonyl bond.
Reason :
Addition depends upon the polarisation of HX and carbonyl bond.

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

323611 Identify compound A from the following reaction.
\({\text{A + }}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{MgBr}}\xrightarrow[{{\text{ ether }}}]{{{\text{dry}}}}{\text{B}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}\)
3- Methylpentan-3-ol

1 Butanal
2 Propanone
3 Propanal
4 Butanone
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323612 Which of the following compound is highly reactive towards \(\mathrm{HCN}\) ?

1 \(\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{CHO}\)
2 \(\mathrm{H}-\mathrm{CHO}\)
3 \(\mathrm{CH}_{3}-\mathrm{CHO}\)
4 \(\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323613 What will be the order of reactivity of the following carbonyl compounds with Grignard's reagent?

supporting img


supporting img


supporting img


supporting img

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

323614 Aldehydes or ketones react with semicarbazide to form corresponding semicarbazone. At what \(\mathrm{pH}\) this reaction is favoured?

1 \(3.5-4\)
2 \(4.5-5.5\)
3 \(5.5-6.5\)
4 \(6.5-7.5\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323615 Assertion :
Halogen acids do not add on to carbonyl bond.
Reason :
Addition depends upon the polarisation of HX and carbonyl bond.

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.