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Electron releasing group (–CH3) decreases acidity while electron withdrawing group (–NO2) increases acidity.

1. Electron withdrawing group (–NO2) increases the acidity while electron releasing group (–CH3) decreases acidity.
2. Electron releasing group (–CH3) increases acidity while electron withdrawing group (–NO2) decreases acidity.
3. Electron releasing group (–CH3) decreases acidity while electron withdrawing group (–NO2) increases acidity.
4. Electron withdrawing group (–CH3) decreases acidity while electron releasing group (–NO2) increases acidity.

Correct answer: Electron releasing group (–CH3) decreases acidity while electron withdrawing group (–NO2) increases acidity.

Solution

Electron withdrawing groups like –NO2 stabilize the conjugate base by delocalizing negative charge, increasing acidity. Conversely, electron releasing groups like –CH3 destabilize the conjugate base, decreasing acidity.

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