The process of separation of a racemic mixture into $d$ and $l$ enantiomers is called .............

$X$ and $Y$ are optically active isomers having the molecular formula $C_5H_9Cl$. When treated with one mole of $H_2$,$X$ gets converted to an optically inactive compound $Z$,but $Y$ gives an optically active compound $P$. The structures of $X$ and $Y$ respectively are:

The absolute configuration of the given molecule is:

Find out the statements which are not true.
$A$. Resonating structure with more number of covalent bonds and lesser charge separation are more stable.
$B$. In electromeric effect, an unsaturated system shows $+E$ effect with nucleophile and $-E$ effect with electrophile.
$C$. Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compounds.
$D$. The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation.
$E$. Stability of carbanion increases with the increase in $s$-character of the carbon carrying the negative charge.
Choose the correct answer from the options given below.

The reaction $\text{spiro[3.3]hept-1-ene} \xrightarrow{H^+, \Delta} A$. The product $A$ is:

Identify the total number of compounds containing at least one chiral carbon atom from the following list:
$1$. $2-$methylcyclohexanone
$2$. Cyclopentane$-1,3-$dione
$3$. $CH_3-CH_2-CH(NO_2)-COOH$
$4$. $CH_3-CH(I)-CH_2-NO_2$
$5$. $CH_3-CH_2-CH(OH)-CH_2OH$
$6$. $CH_3-CH_2-CH(I)-C_2H_5$