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JEE Main202225 Jun 2022Evening ShiftChemistryIonic EquilibriumActual

Assertion: The amphoteric behaviour of water is explained by Lewis acid base theory Reason: water acts as acid with NH 3 and base with H 2 S

Options

  1. ABoth Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. BBoth Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
  3. CAssertion is true but Reason is false.
  4. DAssertion is false but Reason is true.

Correct answer

D. Assertion is false but Reason is true.

Step-by-step solution

H 2 O ⏟ Acid + N ¨ H 3 ⏟ Base → OH - + NH 4 + H 2 O ⏟ Base   + H 2 S Acid ⟶ H 3 O + + HS ⊖ The amphoteric behaviour of H 2 O is explained by Brønsted theory not the Lewis acid base theory. So, we can say Assertion is false, but reason is true.

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