AIIMS 2019 Chemistry Alkenes MCQ Question
Assertion: In trans-pent-2-ene, net dipole moment is non zero.
[Image: Chemical structure of trans-pent-2-ene]
Reason: The dipole moments of and bonds are not equal.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
In trans-pent-2-ene, the molecular geometry leads to different electronegativities between the C−CH₃ and C−C₂H₅ bonds, resulting in unequal bond dipoles. This asymmetry in bond dipoles contributes to a net dipole moment, making the molecule polar. Option B is incorrect because it implies that the dipole moment is zero, which contradicts the observed molecular structure. Options C and D are not applicable as the dipole moment can be determined based on the molecular geometry and bond characteristics.
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