A) \[HSO_{4}^{-}\]
B) \[{{H}_{2}}S{{O}_{4}}\]
C) \[O{{H}^{-}}\]
D) \[{{H}_{3}}{{O}^{+}}\]
Correct Answer: A
Solution :
\[{{H}_{2}}S{{O}_{4}}\]⇌\[{{H}^{+}}+HSO_{4}^{-}\]⇌\[{{H}^{+}}+SO_{4}^{-\,-}\] \[HSO_{4}^{-}\] is conjugate base. But it is also an acid because it lose \[{{H}^{+}}\].
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