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JIPMER2012ChemistryIonic Equilibrium

Which buffer solution comprising of the following has its pH value greater than 7 ?

Options

  1. ACH ₃ COOH + CH ₃ COONa
  2. BHCOOH + HCOOK
  3. CCH ₃ COONH ₄
  4. DNH ₄ OH + NH ₄ Cl

Correct answer

D. NH ₄ OH + NH ₄ Cl

Step-by-step solution

The pH value of basic buffer solutions is always greater than 7. Among the given, only NH ₄ OH + NH ₄ Cl constitutes the basic buffer (a mixture of weak base and its conjugated salt), thus, has pH greater than 7 .

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