Which of the following products is formed when benzaldehyde is treated with $CH_3MgBr$ and the addition product so obtained is subjected to acid hydrolysis?

If formaldehyde and potassium hydroxide are heated,then we get

What are the correct products of the following reaction?
$CH_3CH_2COCH_3 \xrightarrow{NaOCl} \text{Products}$

Predict the product $X$ for the following reaction:
$2\text{-oxocyclohex-3-en-1-yl} \text{ acetate derivative} \rightarrow{NaBH_4, MeOH} X$

You have two $C_6H_{10}O$ ketones,$I$ and $II$. Both are optically active,but $I$ is racemized by treatment with acid and $II$ is not. Wolff-Kishner reduction of both ketones gives the same achiral hydrocarbon,formula $C_6H_{12}$. What reasonable structures may be assigned to $I$ and $II$ respectively?

Identify the structure of $B$ in the following reaction sequence:
$2,6-\text{dimethylcyclohexane-1,4-dione} + \text{ethane-1,2-diol}$ $\xrightarrow{H^+} A$ $\xrightarrow[2. H_3O^+]{1. LiAlH_4} B$