Question

This group shows +I inductive effect.

a) –Br b) –CN c) –COOH d) –CH2CH3​

Answer 1

Answer:

d shows +I inductive effect

Answer 2

-CH2CH3 (Ethyl) group shows +I (inductive) effect.

Detailed Discussion:

• Any alkyl group shows +I effect , this means that these groups have a tendency to push the covalently bonded electron pairs away from themselves.

• Since , they have a tendency to push electron pairs, they have a stabilizing effect on carbon cations through inductive effect and hyperconjugation.

• On the other hand, they make carbon anions un-stable , due to CHARGE INTENSIFICATION.

Other options are eliminated because:

• Halogen substituents like -Br , -Cl , -I show negative inductive effect.

• -CN has maximum ability to show negative inductive effect.

• -COOH also shows -I effective.

$\star$ Hope It Helps .