Which of the following can act both as a Bronsted acid and a Bronsted

1.	Which of the following can act both as a Bronsted acid and a Bronsted base?
A.	\[{{O}^{-2}}\]
B.	\[HCl\]
C.	Both acid and base
D.	\[N{{a}_{2}}C{{O}_{3}}\]
Answer» C. Both acid and base

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Which of the following can act both as a Bronsted acid and a Bronsted base?

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