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Which statement is INCORRECT.

1. Phenol has smaller dipolemoment than methanol.
2. Haloarenes are insoluble in water but are soluble in benzene.
3. Chloroform contains chlorine but gives no reaction with \( A g N O_{3} \) solution.
4. Ethanol has much lower pka value than phenol.

Correct answer: Ethanol has much lower pka value than phenol.

Solution

The incorrect statement is the one claiming ethanol has a much lower pKa than phenol. In reality, phenol is far more acidic than ethanol, so phenol has the lower pKa.

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