The major product $(P)$ in the following reaction is :

Which of the following reactants on reaction with conc. $NaOH$ followed by acidification gives the following lactone as the only product?

The reaction of acetaldehyde with conc. $KMnO_4$ gives

Which of the following undergoes haloform reaction?
$ (i) \ CH_3CH_2COCH_2Cl $
$ (ii) \ C_6H_5COCH_3 $
$ (iii) \ C_6H_5COCHCl_2 $
$ (iv) \ CH_3CH_2COCCl_3 $

Which of the following will undergo deprotonation most readily in a basic medium?

The iodoform test can differentiate between:
$A$. Methanol and Ethanol
$B$. $CH_3COOH$ and $CH_3CH_2COOH$
$C$. Cyclohexene and cyclohexanone
$D$. Diethyl ether and Pentan$-3-$one
$E$. Anisole and acetone
Choose the correct answer from the options given below: