Which one of the following is the correct statement? (a) \( \mathrm...

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Which one of the following is the correct statement?
(a) \( \mathrm{HCO}_{3}- \) is the conjugate base of \( \mathrm{CO}_{3}{ }^{2-} \).
(b) \( \mathrm{NH}_{2}{ }^{-} \)is the conjugate acid of \( \mathrm{NH}_{3} \).
(c) \( \mathrm{H}_{2} \mathrm{SO}_{4} \) is the conjugate acid of \( \mathrm{HSO}_{4}{ }^{-} \).
(d) \( \mathrm{NH}_{3} \) is the conjugate base of \( \mathrm{NH}_{2}{ }^{-} \).
\( \mathrm{P} \)
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