`R` and `S` paris of enantiomers differ form one another in

Two enantiomers differ with respect to

The three isotopes of hydrogen differ from one another in

An enantiomer and its racemic form have

The two enantiomers of secondary butyl chloride differ from each other in which one of the following properties?

Assign the R and S configurations to the enantiomers of 2-chlorobutane.

Assign the R and S configurations to the enantiomers of 2-chlorobutane.

Why are both the enantiomers formed in S_N1 reaction?