How many alcohols with molecular formula C₄H₁₀O are chiral in nature? 

I. 1

II. 2 

III. 3

IV. 4 

This is a multiple choice answer as classified in NCERT Exemplar

(I) The alcohol with molecular formula C₄H₁₀O is butanol has 4 isomers, these are:

(a) CH₃-CH₂CH₂-CH₂OH   (Butane-1-ol)

(b) CH₃-C^*H-CH₂-CH₃  (Butane-2-ol)

              |

            OH

(c) CH₃-CH-CH₂-OH         (2-methylpropane-1-ol)