MHT CET · Chemistry · Aldehydes and Ketones
Ethyl methyl ketone is obtained by heating calcium salts of
- A formic acid \(+\) propionic acid
- B acetic acid + propionic acid
- C acetic acid only
- D acetic acid + methanoic acid
Answer & Solution
Correct Answer
(B) acetic acid + propionic acid
Step-by-step Solution
Detailed explanation
Ethyl methyl ketone is an unsymmetric ketone, so two different acids (in the form of calcium salt) are used. The structure of ethyl methyl ketone is
\(
\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}
\)
The structure shows the presence of 4 carbon atoms, thus the calcium salts must be of acetic acid and propionic acid to form \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}\).
\(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COO}\right)_{2} \mathrm{Ca}+\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Ca} \stackrel{\text { Distill }}{\longrightarrow}\) \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}+\mathrm{CaCO}_{3}\)
\(
\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}
\)
The structure shows the presence of 4 carbon atoms, thus the calcium salts must be of acetic acid and propionic acid to form \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}\).
\(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COO}\right)_{2} \mathrm{Ca}+\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Ca} \stackrel{\text { Distill }}{\longrightarrow}\) \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}+\mathrm{CaCO}_{3}\)
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