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

323556 \[\begin{gathered}
{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}\xrightarrow{{{\text{C}}{{\text{H}}_{\text{3}}}{\text{MgCl}}}}{\text{X}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{Y}} \hfill \\
\xrightarrow[{573\;{\text{K}}}]{{{\text{Cu}}}}{\text{Z}}\xrightarrow{{{\text{ Conc}}{\text{. }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}}}{\text{ Mesitylene }} \hfill \\
\end{gathered} \]
Identify the substance ' Y '.

1 Acetone
2 2-Propanol
3 Paraldehyde
4 Isobutylene
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323557 In the following sequence of reactions
supporting img
The product (Y) is

1 \(\mathrm{PhCOCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{PhCHOHCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{PhCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{PhCH}=\mathrm{CHCH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323558 Compound \(A\) undergoes Cannizzaro reaction and \(B\) undergoes positive iodoform test. Therefore

1 \(A=\) Acetaldehyde; B=1-pentanal
2 \({\rm{A = }}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO;}}\;\;\;{\kern 1pt} {\rm{B = 3}} - {\rm{pentanone}}\)
3 A Formaldehyde; B = 2-pentanone
4 A Propionaldehyde; B=1-pentanol
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323559 \({\left( {{\text{C}}{{\text{H}}_3}} \right)_2}{\text{CO}}\xrightarrow[{{\text{HCl}}}]{{{\text{NaCN}}}}{\text{A}}\xrightarrow[{}]{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{B}}\)
In the above sequence of reactions (A) and (B) are

1 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{COOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH})_{2}\)
3 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCOOH}\)
4 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{O}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323556 \[\begin{gathered}
{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}\xrightarrow{{{\text{C}}{{\text{H}}_{\text{3}}}{\text{MgCl}}}}{\text{X}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{Y}} \hfill \\
\xrightarrow[{573\;{\text{K}}}]{{{\text{Cu}}}}{\text{Z}}\xrightarrow{{{\text{ Conc}}{\text{. }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}}}{\text{ Mesitylene }} \hfill \\
\end{gathered} \]
Identify the substance ' Y '.

1 Acetone
2 2-Propanol
3 Paraldehyde
4 Isobutylene
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323557 In the following sequence of reactions
supporting img
The product (Y) is

1 \(\mathrm{PhCOCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{PhCHOHCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{PhCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{PhCH}=\mathrm{CHCH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323558 Compound \(A\) undergoes Cannizzaro reaction and \(B\) undergoes positive iodoform test. Therefore

1 \(A=\) Acetaldehyde; B=1-pentanal
2 \({\rm{A = }}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO;}}\;\;\;{\kern 1pt} {\rm{B = 3}} - {\rm{pentanone}}\)
3 A Formaldehyde; B = 2-pentanone
4 A Propionaldehyde; B=1-pentanol
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323559 \({\left( {{\text{C}}{{\text{H}}_3}} \right)_2}{\text{CO}}\xrightarrow[{{\text{HCl}}}]{{{\text{NaCN}}}}{\text{A}}\xrightarrow[{}]{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{B}}\)
In the above sequence of reactions (A) and (B) are

1 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{COOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH})_{2}\)
3 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCOOH}\)
4 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{O}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323556 \[\begin{gathered}
{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}\xrightarrow{{{\text{C}}{{\text{H}}_{\text{3}}}{\text{MgCl}}}}{\text{X}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{Y}} \hfill \\
\xrightarrow[{573\;{\text{K}}}]{{{\text{Cu}}}}{\text{Z}}\xrightarrow{{{\text{ Conc}}{\text{. }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}}}{\text{ Mesitylene }} \hfill \\
\end{gathered} \]
Identify the substance ' Y '.

1 Acetone
2 2-Propanol
3 Paraldehyde
4 Isobutylene
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323557 In the following sequence of reactions
supporting img
The product (Y) is

1 \(\mathrm{PhCOCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{PhCHOHCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{PhCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{PhCH}=\mathrm{CHCH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323558 Compound \(A\) undergoes Cannizzaro reaction and \(B\) undergoes positive iodoform test. Therefore

1 \(A=\) Acetaldehyde; B=1-pentanal
2 \({\rm{A = }}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO;}}\;\;\;{\kern 1pt} {\rm{B = 3}} - {\rm{pentanone}}\)
3 A Formaldehyde; B = 2-pentanone
4 A Propionaldehyde; B=1-pentanol
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323559 \({\left( {{\text{C}}{{\text{H}}_3}} \right)_2}{\text{CO}}\xrightarrow[{{\text{HCl}}}]{{{\text{NaCN}}}}{\text{A}}\xrightarrow[{}]{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{B}}\)
In the above sequence of reactions (A) and (B) are

1 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{COOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH})_{2}\)
3 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCOOH}\)
4 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{O}\)
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CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323556 \[\begin{gathered}
{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}\xrightarrow{{{\text{C}}{{\text{H}}_{\text{3}}}{\text{MgCl}}}}{\text{X}}\xrightarrow{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{Y}} \hfill \\
\xrightarrow[{573\;{\text{K}}}]{{{\text{Cu}}}}{\text{Z}}\xrightarrow{{{\text{ Conc}}{\text{. }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}}}{\text{ Mesitylene }} \hfill \\
\end{gathered} \]
Identify the substance ' Y '.

1 Acetone
2 2-Propanol
3 Paraldehyde
4 Isobutylene
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323557 In the following sequence of reactions
supporting img
The product (Y) is

1 \(\mathrm{PhCOCH}_{2} \mathrm{CH}_{3}\)
2 \(\mathrm{PhCHOHCH}_{2} \mathrm{CH}_{3}\)
3 \(\mathrm{PhCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}\)
4 \(\mathrm{PhCH}=\mathrm{CHCH}_{3}\)
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323558 Compound \(A\) undergoes Cannizzaro reaction and \(B\) undergoes positive iodoform test. Therefore

1 \(A=\) Acetaldehyde; B=1-pentanal
2 \({\rm{A = }}{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO;}}\;\;\;{\kern 1pt} {\rm{B = 3}} - {\rm{pentanone}}\)
3 A Formaldehyde; B = 2-pentanone
4 A Propionaldehyde; B=1-pentanol
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS

323559 \({\left( {{\text{C}}{{\text{H}}_3}} \right)_2}{\text{CO}}\xrightarrow[{{\text{HCl}}}]{{{\text{NaCN}}}}{\text{A}}\xrightarrow[{}]{{{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{ + }}}}}{\text{B}}\)
In the above sequence of reactions (A) and (B) are

1 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{COOH}\)
2 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH})_{2}\)
3 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCOOH}\)
4 \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{CN},\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}=\mathrm{O}\)