Question

The number of optical isomers of $C{H}_{3}CH(OH)CH(OH)CHO$ is:

• A. zero
• B. 2
• C. 3
• D. 4
• E. 6

Answer 1

Answer: (D)

$\begin{array}{c}C{H}_3\\ |\\ H-C^{\ast }-OH\\ |\\ H-C^{\ast }-OH\\ \begin{array}{rl}& |\\ & CHO\end{array}\end{array}$ Possible number of optical isomers $=2^n$ $=2^n=4$