$Ph-CH_3$ $\xrightarrow{CrO_2Cl_2} (A)$ $\xrightarrow{conc. KOH} Ph-CH_2OH + (B)$
Product $(B)$ of the above reaction is:

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:

Which one of the following reacts with $HCN$ and Tollen's reagent,but is not oxidised by Fehling's solution?

Which of the following gives an alcohol and salt of carboxylic acid when reacted with conc. $NaOH$?

The addition of $HCN$ to carbonyl compounds is an example of

The value of $x$ in the above reaction is: