Question

Match List -I with List II:

Choose the correct answer from the options given below :

• (A) – (IV), (B) – (III), (C) – (I), (D) – (II)
• (A) – (III), (B) – (I), (C) – (II), (D) – (IV)
• (A) – (II), (B) – (IV), (C) – (III), (D) – (I)
• (A) – (I), (B) – (II), (C) – (IV), (D) – (III)

Answer 1

The Correct Option is A

Understand the Effects (Inductive, Resonance, and Electromeric):

E Effect (Electromeric Effect): A temporary effect where a pi bond shifts to one of the atoms in the presence of an attacking reagent.

R Effect (Resonance Effect): The delocalization of electrons in a conjugated system.

+E Effect (Positive Electromeric Effect): Electron pair movement towards the attacking atom.

+R Effect (Positive Resonance Effect): Electron-donating resonance effect, often seen in groups with lone pairs that can donate electron density.

Match Each Mechanism with the Correct Effect:

• (A) Shows a nucleophile attacking and shifting a lone pair, which is a +R effect (IV).
• (B) Shows protonation that increases electron density through resonance, an R effect (II).
• (C) Shows cyanide attaching and shifting electron density, representing +E effect (III).
• (D) Shows electron density shift due to a nitro group, indicating E effect (I).

Conclusion:

The correct matching is:

\[ (A) - (IV), \, (B) - (II), \, (C) - (III), \, (D) - (I) \]

which corresponds to Option (1).