Assertion :Staggered form is less stable than the eclipsed form. Reason: The conformation in which the bond pairs of two central atoms are very far from one another is called staggered form.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is incorrect but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is incorrect but Reason is correct
The staggered form is more stable than the eclipsed form because the potential of the energy of staggered form in which the bond pair of two carbons are far away from each other is minimum. Also, the $H -$ atoms are as far part as possible and non bonded interaction between them is maximum.

In eclipsed form, the $H -$ atom are very close and so the increased overlap between them non-bonded orbitals is repulsive. That is why the staggered form is more stable than an eclipsed form.

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