Question

Acetone is the major product in:
(A) $C{{H}_{2}}=C=C{{H}_{3}}\xrightarrow{\text{ }{{H}^{+}}/{{H}_{2}}O}........$
(B) $C{{H}_{3}}-C\equiv CH\xrightarrow[{{H}_{2}}{{O}_{2}}{{/}^{-}}OH]{\text{ }B{{H}_{3}}/THF}........$
(C) $C{{H}_{3}}-C\equiv CH\xrightarrow[NaB{{H}_{4}}]{\text{ }Hg{{\left( OAc \right)}_{2}}/{{H}_{2}}O}........$
(D) $CH3-C\equiv CH\xrightarrow{\text{ }H{{g}^{2+}}/{{H}_{\left( aq \right)}}}........$

Answer 1

We know that acetone, also known as dimethyl ketone and propanone is the simplest, smallest and most important of all the aliphatic fat-derived ketones. Pure acetone is a colourless, clear liquid. It is somewhat aromatic with a pleasant fruity odour and is a volatile, flammable liquid.

Complete answer:
Acetone naturally occurs in plants, trees, volcanic gases, forest fires, and as a product of the breakdown of body fat. It is also found in small quantities in normal urine and blood, while the concentration may be higher in diabetic patients. Acetone is mostly produced directly or indirectly from propylene. Roughly $83$ of acetone is produced by the cumene process. Since this process requires phenol, acetone production is tied to phenol production. In the cumene process, benzene is treated with alkaline propylene to produce cumene, which is oxidized by air to produce phenol and acetone.
$C{{H}_{2}}=C=C{{H}_{3}}\xrightarrow{\text{ }{{H}^{+}}/{{H}_{2}}O\text{ }}C{{H}_{2}}=C\left( OH \right)-C{{H}_{3}}\xrightarrow{\text{ }tautomerization \text{ }}C{{H}_{3}}-C\left( =O \right)-C{{H}_{3}}$
$C{{H}_{3}}-C\equiv CH\xrightarrow{\text{ }H{{g}^{2+}}/{{H}_{\left( aq \right)}}\text{ }}C{{H}_{3}}-C\left( OH \right)=C{{H}_{2}}\xrightarrow{\text{ }tautomerization \text{ }}C{{H}_{3}}-C\left( =O \right)-C{{H}_{3}}$
Acetone also functions as a solvent in the pharmaceutical industry and is used as a denaturant in denatured alcohols. Acetone is also present as an excipient in multiple pharmaceutical drugs Although it is somewhat flammable, acetone is used as a solvent during storage and transportation of acetylene, which cannot be pressurized as a pure compound. Hence acetylene is dissolved in acetone while being transported. One-third of the world's acetone is used as a solvent.
Therefore, the correct answer is option A and D.

Note:
Remember that acetone is a good usable solvent for many plastics and a few synthetic fibers. It is used to dissolve two-part epoxies and superglue before they harden. It is also used for thinning polyester resin and cleaning tools with it. It is used in paints and varnishes as a volatile component.