Aldol condensation involving $CH_3-CHO + CH_3-CHO$ gives the product:

Identify the product $Y$ in the following reaction sequence:
$CH_3CHO + CH_3MgI$ $\xrightarrow{\quad} X$ $\xrightarrow{H_2O/H^+} Y$

$CH_3-CH(OH)-CH_3 \xrightarrow{Cu/300^\circ C} \text{Product (X)}$. Which of the following is correct about product $X$?

Match the following lists:

Compound $(A)$ with molecular formula $C_6H_{12}O$ is optically active. Compound $(A)$ gives a negative Tollens test and a positive test with $2,4$-dinitrophenylhydrazine. Identify $(A)$.

Which of the following methods can be used to oxidize $Butan-2-one$ to $Propionic \ acid$?