Q.

Given below are four compounds :
a) n-propyl chloride    b) iso-propyl chloride
c) sec-butyl chloride     d) neo-pentyl chloride

Percentage of carbon in the one which exhibits optical isomerism is :       [2026]

1 56  
2 52  
3 40  
4 46  

Ans.

(2)

 2-Chlorobutane is optically active and chiral molecule

Molecular formulaC4H9Cl

Molar mass=48+9+35.5=92.5

%OC=4892.5×100=51.89%