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NEET2002ChemistryIonic EquilibriumActual

Which has highest pH ?

Options

  1. ACH ₃ COOK
  2. BNa ₂ CO ₃
  3. CNH ₄ Cl
  4. DNaNO ₃

Correct answer

B. Na ₂ CO ₃

Step-by-step solution

NaNO ₃ is salt formed by the combination of a strong acid HNO ₃ and a strong base NaOH and hence it is neutral with a pH . CH ₃ COOK is formed by the combination of weak acid CH ₃ COOH and strong base KOH and hence pH will be above 7 . NH ₄ Cl is formed by the formation of strong and HCl and a weak base NH ₄ OH and hence pH will be lesser than 7. Na ₂ CO ₃ is a salt formed by the strong base NaOH and weak acid H ₂ CO ₃ . Hence, pH of the salt will be highest. The pH scale was invented in 1909 by a Danish biochemist

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