Both assertion and reason are true and reason is correction explanation of assertion
Both assertion and reason are true and reason is not the correction explanation of assertion
Assertion is true and reason is false
Assertion is false and reason is true
Show Solution
The Correct Option isA
Solution and Explanation
The question involves the polarity of trans But-2-ene and cis But-2-ene and their related dipole moments. Let's explore the chemistry behind these compounds to understand why the assertion and reason are true and how the reason explains the assertion.
Polarity and Dipole Moment:
In organic chemistry, isomers such as cis and trans configurations can have different physical properties, including polarity.
The polarity of a molecule is determined by its dipole moment, which is a vector quantity that depends on the electronegativity differences and the spatial arrangement of atoms.
Structure of But-2-ene:
Cis But-2-ene: In this configuration, similar groups are on the same side of the double bond. This creates a net dipole moment because the molecular dipole moments from the C-H bonds do not cancel each other out entirely.
Trans But-2-ene: In this configuration, similar groups are on opposite sides of the double bond, which causes the dipole moments to cancel out, resulting in a 0 dipole moment.
Reasoning:
The assertion states that trans But-2-ene is less polar than cis But-2-ene. This is true because trans But-2-ene has a symmetrical structure where the dipole moments cancel each other, leading to no net dipole moment (non-polar), while cis But-2-ene is polar due to an asymmetrical arrangement of dipoles.
The reason states that trans But-2-ene has zero dipole moment, which is indeed the correct explanation for why trans But-2-ene is less polar.
Conclusion:
Both the assertion and reason are accurate, and the reason explains the assertion by highlighting the structural cause of the zero dipole moment in the trans isomer.
The correct option is: Both assertion and reason are true and reason is correction explanation of assertion
