Question

Which of the following is incorrect regarding inductive effect?

• A. Inductive effect ceases to
  operate (or is negligible) after 3rd Carbon from the substituent.
• B. Inductive effect is a temporary effect
• C. Inductive effect occurs due to polarisation of sigma electrons
• D. Electron pair shifts towards more electronegative atom partially and permanently.

Answer 1

The correct option is B Inductive effect is a temporary effect

Option(a) is correct because as distance increases, strength of Inductive effect decreases.

Option(b) is wrong as permanent polarisation of bond due to shifting of shared pair of sigma electrons towards the more electronegative atom/substituent occurs. So inductive effect is a permanent effect.

Option(c) is correct as inductive effect operates through sigma bond only i.e. no displacement of π electrons.

Option(d) is also correct as electron pair shifts towards more electronegative atom partially and permanently.