Exams › JEE Main › Chemistry

Statement-I: Me3C+ is more stable than Me2CH+, and Me2CH+ is more stable than MeCH2+. Statement-II: The greater the number of hyperconjugative (no-bond resonance) structures, the more stable the carbocation. Choose the correct option.

1. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
2. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
3. Statement-1 is true, statement-2 is false.
4. Statement-1 is false, statement-2 is true.

Correct answer: Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.

Solution

Carbocation stability order is 3 deg > 2 deg > 1 deg, which is exactly Me3C+ > Me2CH+ > MeCH2+, so Statement-I is true. The number of hyperconjugative structures equals the number of alpha C-H bonds: 9, 6, 3 respectively. More hyperconjugative structures means greater delocalization of positive charge and greater stability, so Statement-II is true AND it correctly explains Statement-I.

Related JEE Main Chemistry questions

• Lactic acid loses its optical activity when the hydroxyl group is replaced by hydrogen because
• Which is the most suitable technique for separating a mixture of sugars?
• Which statement correctly compares the staggered and eclipsed conformations of ethane?
• Which statement correctly describes a common feature shared by optical and geometrical isomerism?
• Which substituent lowers the reactivity of a benzene ring toward electrophilic substitution, yet still mainly directs a new group to the ortho and para positions?
• Among the following substances, which has the greatest affinity for a proton?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →