A) \[Na{{H}_{2}}P{{O}_{4}}+N{{a}_{2}}HP{{O}_{4}}\]
B) \[{{H}_{3}}P{{O}_{4}}+Na{{H}_{2}}P{{O}_{4}}\]
C) \[C{{H}_{3}}COOH+C{{H}_{3}}COONa\]
D) \[N{{a}_{2}}HP{{O}_{4}}+N{{a}_{3}}P{{O}_{4}}\]
E) \[{{H}_{2}}C{{O}_{3}}+HCO_{3}^{-}\]
Correct Answer: E
Solution :
\[{{H}_{2}}C{{O}_{3}}\] + \[HCO_{3}^{-}\] buffer present in human blood, which maintain pH of blood.
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