AIIMS 2013
- Exam
- AIIMS
- Year
- 2013
- Subject
- Chemistry
- Chapter
- Chemical Bonding and Molecular Structure
AIIMS 2013 · Chemistry · Chemical Bonding and Molecular Structure
Assertion : cis-3-chloroprop-2-enoic acid is less stable than its...
Assertion : cis-3-chloroprop-2-enoic acid is less stable than its trans-form.
Reason : Dipole moment of cis-form is greater than trans-form.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
Step-by-step solution
Assertion is true because usually, for acrylic systems trans-isomers are more stable than cisisomers. 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.