JEE Main · 2024 · Shift-IIeasyGOC-056

The functional group that shows negative resonance effect is:

General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question

Question

The functional group that shows negative resonance effect is:

Options
  1. a

    -NH₂

  2. b

    -OH

  3. c

    -COOH

    ✓
  4. d

    -OR

Correct Answerc

-COOH

Detailed Solution

Step 1: Identifying Negative Resonance (-R) A negative resonance effect occurs when a functional group withdraws electron density from a conjugated system.

  • \ce−NH2,−OH,−OR\ce{-NH2, -OH, -OR}: All have lone pairs to donate, showing +R+R.
  • \ce−COOH\ce{-COOH}: Contains a \ceC=O\ce{C=O} bond that withdraws electrons from the system through resonance.

Answer: (c) -COOH\boxed{\text{Answer: (c) -COOH}} image

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