The enol form of acetone after treatment with `D_(2)O` gives:

Options

A. `CH_(3)-overset(OD)overset("| ")"C ="CH_(2)`
B. `CD_(3)-overset(O)overset(||)C-CD_(3)`
C. `CH_(2)=overset(OH)overset("| ")"C "-CH_(2)D`
D. `CD_(2)=overset(OD)overset("| ")C-CD_(3)`.

Answer

B

Explanation

The enol form of acetone on treatment with `D_(2)O` undegoes enolisation, deutration (addition of `D_(2)O`) and dehydration (removal `H_(2)O`). The repeated enolisation, deutration and dehydration ultimately gives `CD_(3).COCD_(3)`(B).