Given below are two statements: Statement I: Hyperconjugation is not a permanent effect. Statement II: In general,…
General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question
Given below are two statements:
Statement I: Hyperconjugation is not a permanent effect. Statement II: In general, greater the number of alkyl groups attached to a positively charged C-atom, greater is the hyperconjugation interaction and stabilization of the cation.
In the light of the above statements, choose the correct answer:
- a
Statement I true but Statement II false
- b
Both Statement I and Statement II are false
- c✓
Statement I false but Statement II true
- d
Both Statement I and Statement II are true
Statement I false but Statement II true
Step 1: Understanding Hyperconjugation Hyperconjugation (no-bond resonance) involves the delocalization of -electrons of bond of an alkyl group directly attached to an atom of unsaturated system or to an atom with an unshared -orbital. It is a permanent effect.
Step 2: Evaluating Statements
- Statement I: "Hyperconjugation is a temporary effect." (False - It is permanent).
- Statement II: "The more the number of alkyl groups attached to a carbocation, the greater is the stabilization." (True - More -hydrogens increase hyperconjugative structures).
Practice this question with progress tracking
Want timed practice with adaptive difficulty? Solve this question (and hundreds more from General Organic Chemistry (GOC)) inside The Crucible, our adaptive practice platform.
More JEE Main General Organic Chemistry (GOC) PYQs
Ascending acidity order of the following H atom is:
The set of meta directing functional groups from the following sets is:
Correct carbocation stability order:
How many compounds show inductive, mesomeric AND hyperconjugation effects?
Correct stability order of resonance structures of CH₃-CH=CH-CHO: