Which of the following can give $OH^{-}$ ions?
- A$H_2O$
- B$H_3O^{+}$
- C$H_2$
- D$HCl$
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Identify the conjugate bases of $H_3PO_3$ and $H_2SO_4$ respectively from the following.
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$(ii)$ $HPO_4^{2-}$
$(iii)$ $HS^{-}$
$(i)$ $(CH_3)_2NH$
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$(iii)$ $HS^{-}$
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