Which of the following may exhibit conformational isomerism?

C H_{2} = C H_{2}

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C H \equiv C H

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C H_{3} - C H_{3}

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C H_{2} = C H O H

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Solution

The correct option is C $C H_{3} - C H_{3}$
If two different 3D arrangements in space of the atoms in a molecule are interconvertible merely by free rotation about bonds, they are called Conformations. Free rotation is only possible in alkanes, so, alkanes show conformational isomerism.

So, option C is correct because ethane is an alkane.

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Which of the following is a metamer of $C H_{3} C H_{2} - S - C H_{2} C H_{3}$ ?

C H_{3} C H_{2} C H_{2} - O | | C - O - C H_{2} C H_{3}

C H_{3} C H_{2} - O | | C - O - C H_{2} C H_{2} C H_{3}

{C H}_{3} C H_{2} {C H}_{2} {C H}_{2} {C H}_{3}, {C H}_{3} - {C H}_{3} | C H - {C H}_{2} C H_{3}, {C H}_{3} - {C H}_{3} | C_{3} - {C H}_{3}

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