Among the following reactions,a mixture of diastereomers is produced from

According to $Cahn-Ingold-Prelog$ sequence rules,the correct order of priority for the given groups is

Which of the following types of isomerism is shown by pentanone?

Which of the following molecules are chiral?

The number of stereoisomers possible for the following compound is $CH_3-CH=CH-CH(OH)-CH_3$.

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.