Question

Which isomer of C₄H₁₀O is optically active?

Options

• 2-methylpropan-2-ol

• 2-methylpropan-l-ol

• Butan-1-ol

• Butan-2-ol

Answer 1

Butan-2-ol

Explanation:

\[\begin{array}{cc}
\ce{H}\phantom{......}\\
|\phantom{......}\\
\ce{H3C - ^*C - CH2 - CH3}\\
|\phantom{......}\\
\ce{OH}\phantom{....}
\end{array}\]

Butan-2-ol is optically active as it has chiral carbon at C - 2 position.