Assertion : cis-3 -chloroprop-2enoic acid is less stable than its trans-form.
Reason : Dipole moment of cis-form is greater than trans-form.

Options

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

Answer

B

Explanation

Assertion is true because usually, for acrylic systems trans-isomers are more stable than cis-isomers. This is due to increased unfavourable steric interaction of the substituents in cis-isomer. Reason is also true because generally the dipole moment of trans-form is zero (or less) depending whether the substituents on both sides of double bond are same or not while cis-forms are polar in nature with certain value of dipole moment.