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NEET UG CHEMISTRY MCQ: HYDROCARBONS

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Which of the following statement(s) is/are correct regarding rotation around internuclear axis of C−C\mathrm{C}-\mathrm{C} bond?

I. Rotation produces rotamers.

II. Magnitude of torsional strain depends upon the angle of rotation about C−C\mathrm{C}-\mathrm{C} bond.

III. Repulsive interaction between adjacent bond is termed as torsional strain.

IV. Ethane has only four conformational isomers.
Choose the correct option.
View answer and explanation
Correct option: B
I, II and III
Option B (I, II and III) is correct because rotation around the internuclear axis of a C-C bond produces rotamers, the magnitude of torsional strain depends on the angle of rotation, and repulsive interactions between adjacent bonds are termed torsional strain.

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