question_answer

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.

Read the assertion and reason carefully to mark the correct option out of the options given below:

A)  If both assertion and reason are true and the reason is the correct explanation of the assertion.

B)  If both assertion and reason are true but reason is not the correct explanation of the assertion.

C)  If assertion is true but reason is false.

D)  If the assertion and reason both are false.

E)  If assertion is false but reason is true. [e] The staggered form is more stable than the eclipsed form because the potential energy of staggered form in which the bond pairs of two carbons are far away from each other is minimum. Also the H-atoms are as far apart as possible and non-bonded interaction between them is maximum. In occupied form, the H-atom are very close and so the increased overlap between them non-bonded orbitals is repulsive. That is why staggered form is more stable than eclipsed form.