The number of chiral alcohol(s) with molecular formula C 4 H 10 O is ________ (Assume stereoisomers as…

Molecular formula $={\mathrm{C}}_4{\mathrm{H}}_{10}\mathrm{O}$

Degree of unsaturation $=\left(\mathrm{C}+1\right)-\frac{\mathrm{H}+\mathrm{X}-\mathrm{N}}{2}=5-\frac{10}{2}=0$

Possible alcohols are:

2-butanol exhibits optical isomerism, hence, two stereoisomers need to be considered.