Acetophenone $(PhCOCH_3)$ reacts with perbenzoic acid to produce a compound $X$. Reaction of $X$ with excess $CH_3MgBr$ followed by treatment with aqueous acid predominantly produces

Acetaldehyde can be converted into $C(CH_2OH)_4$ (pentaerythritol) by which reagent?

The product $B$ is formed by the reaction of cyclohexanone with hydroxylamine $(NH_2OH)$ to form an oxime $(A)$,followed by a Beckmann rearrangement using polyphosphoric acid $(PPA)$. Identify the product $B$.

Which one of the following is used for the purification of aldehydes?

Compare the stability of the enolate formed from $A$ (cyclohexane$-1,3-$dione) and $B$ (cyclohexane$-1,4-$dione).
Which of the following statements is true?

Compound $P$ $(C_{8}H_{8}O)$ gives a red-orange precipitate with $2,4-DNP$ reagent and it does not reduce Fehling's reagent. On drastic oxidation with chromic acid,$P$ gives an aromatic product $Q$ that produces effervescence on treating with aqueous $NaHCO_{3}$. Compound $P$ and $Q$,respectively,are: