Question

Shifting of electrons of a multiple bond under the influence of reagent is called?

• A. I-effect
• B. M-effect
• C. E-effect
• D. T-effect

Answer 1

The correct option is B M-effect

Solution: Multiple bonds refer to the double bond or triple bond. So, shifting of electrons of multiple bonds under the influence of reagent is called M- effect. Here, M stands for mesomeric. In this effect, the electron density is increased over the conjugated system.

Hence, the correct option is (B).