Which is not true about acetophenone?

An organic compound $P$ having molecular formula $C_6H_6O_3$ gives a ferric chloride test and does not have an intramolecular hydrogen bond. The compound $P$ reacts with $3$ equivalents of $NH_2OH$ to produce oxime $Q$. Treatment of $P$ with excess methyl iodide in the presence of $KOH$ produces compound $R$ as the major product. Reaction of $R$ with excess iso-butylmagnesium bromide followed by treatment with $H_3O^{+}$ gives compound $S$ as the major product. The total number of methyl $(-CH_3)$ groups in compound $S$ is . . . .

Match the items in List-$I$ with the items in List-$II$ and select the correct code:

List-$I$	List-$II$
$A$. Tollen's reagent	$I$. Para-rosaniline + $SO_2$
$B$. Schiff's reagent	$II$. Rochelle salt + $aq. NaOH$
$C$. Rosenmund reduction	$III$. Ammoniacal silver nitrate
$D$. Fehling solution $B$	$IV$. $Pd + BaSO_4$

Which of the following will be dehydrated most readily in alkaline medium?

Explain the iodoform test.

Splitting of signals in $NMR$ spectroscopy is caused by