JEE CHEMISTRY MCQ: HYDROCARBONS

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Understanding +4 | -1

Which of the following statement(s) is/are correct?

(i) Alkanes can have infinite number of conformations by rotation around a

{C}-{C}

single bonds.

(ii) Rotation around

{C}-{C}

single bond is completely free.

(iii) Rotation is hindered by a small energy barrier of

1-20 {~kJ} {~mol}^{-1}

due to torsional strain.

View answer and explanation

Correct option: B

(i) and (iii)

Option B ((i) and (iii)) is correct because alkanes can have infinite conformations due to rotation around C-C single bonds, and this rotation is hindered by a small energy barrier due to torsional strain.

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