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MHT CET Medical202623 April 2026Morning ShiftChemistryIonic EquilibriumActual

Which from the following is NOT a buffer solution?

Options

  1. ACH ₃ COOH + CH ₃ COONa in water.
  2. BNH ₄ OH + NH ₄ Cl in water.
  3. CHCOOH + HCOONa in water.
  4. DCH ₃ COOH + NaCl in water.

Correct answer

D. CH ₃ COOH + NaCl in water.

Step-by-step solution

A buffer solution is formed by mixing a weak acid and its conjugate base (salt with a strong base) or a weak base and its conjugate acid (salt with a strong acid). CH ₃ COOH + CH ₃ COONa is an acidic buffer because it contains a weak acid ( CH ₃ COOH ) and its salt with a strong base ( CH ₃ COONa ). NH ₄ OH + NH ₄ Cl is a basic buffer because it contains a weak base ( NH ₄ OH ) and its salt with a strong acid ( NH ₄ Cl ). HCOOH + HCOONa is an acidic buffer because it contains a weak acid ( HCOOH ) and its salt with

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