In the following reaction,product $P$ is: $RCOCl \xrightarrow{H_2, Pd-BaSO_4} P$

Consider the following statements. Which of the following reactions can be used to prepare acetophenone?
$I.$ Oxidation of $1$-phenylethanol.
$II.$ Reaction of benzaldehyde with methyl magnesium bromide.
$III.$ Friedel-Crafts acylation of benzene with acetyl chloride.
$IV.$ Distillation of calcium benzoate.
Which of these statements are correct?

Give the conversion of the following:
$(i)$ Lactic acid from ethanal
$(ii)$ $p-$fluorobenzaldehyde from $p-$fluorotoluene

In the sequence of the following reactions $CH_3CH_2OH$ $\xrightarrow{[O]}$ $X$ $\xrightarrow{[O]}$ $CH_3COOH$,$X$ is

Predict the product of the following reaction:
$m\text{-Tolunitrile} \xrightarrow[(ii) H_3O^+]{(i) CH_3MgBr} \text{Product}$

Nitriles are reduced to corresponding imine with stannous chloride in the presence of hydrochloric acid,which on hydrolysis gives the corresponding aldehyde. This reaction is called: