Write the structures of the isomers of alcohols with molecular formula C₄H₁₀O. Which of these exhibits optical activity? 

<p><span data-teams="true">This is a short answer type question as classified in NCERT Exemplar</span></p><p>The alcohol with molecular formula C₄H₁₀O is butanol has 4 isomers, these are:</p><p><strong> (a) </strong>CH₃-CH₂CH₂-CH₂OH &nbsp; (Butane-1-ol)</p><p><strong> (b) </strong>CH₃-C^*H-CH₂-CH_3&nbsp; (Butane-2-ol)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;OH</p><p><strong> (c) </strong>CH₃-CH-CH₂-OH_{&nbsp; &nbsp; &nbsp; &nbsp;} (2-methylpropane-1-ol)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CH₃</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CH₃</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|&nbsp;</p><p><strong> (d) </strong>CH₃- C-CH₃ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (2-methylpropan-2-ol)</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|</p><p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;OH</p><p>Only butane-2-ol has chiral carbon due to it being the alcohol with molecular formula C₄H₁₀O exhibits optical activity.</p>

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