When Mixed in Appropriate Amounts,each of the Following Mixtures Can

Multiple Choice

When mixed in appropriate amounts,each of the following mixtures can produce an effective buffer solution EXCEPT

A) HCl and NaH₂PO₄
B) Na₂HPO₄ and Na₃PO₄.
C) NaHCO₃ and Na₂CO₃.
D) NaH₂PO₄ and Na₂HPO₄.
E) NaOH and NaF.