Question

Match List I with List II

List I	List II
(A). Inductive effect	(I). Delocalization of \(π\) electrons
(B). Hyper-conjugation	(II). Displacement of \(π\) electrons
(C). Resonance effect	(III). Delocalization of \(σ\) electrons
	(IV). Displacement of \(σ\) electrons

Choose the correct answer from the options given below:

• A. \((A)-(IV),(B)-(III),(C)-(I)\)
• B. \((A)-(II),(B)-(IV),(C)-(I)\)
• C. \((A)-(I),(B)-(II),(C)-(IV)\)
• D. \((A)-(III),(B)-(IV),(C)-(I)\)

Hint:

Inductive effect moves sigma electrons, hyperconjugation delocalises sigma electrons, resonance delocalises pi electrons.

Answer 1

The Correct Option is A

Step 1: Sigma versus pi
Sigma electrons are in single bonds, pi electrons in multiple bonds.

Step 2: Inductive
Polarisation of a sigma bond is displacement of sigma electrons: IV.

Step 3: Hyperconjugation and resonance
Hyperconjugation spreads the sigma electrons of C-H into the neighbouring pi system: III. Resonance spreads pi electrons: I.

Step 4: Pick
Only option (A) has IV, III, I in that order.

Final Answer:
Option (A). \[ \boxed{(A)-(IV),(B)-(III),(C)-(I)} \]