\textbf{82 --} Which compound has ionic and covalent bonds, and when dissolved in water, the attractive force of the ion -- dipole type between the average ionic bond energy in the compound, and the hydrogen bond in water, is greater?
(1) $\mathrm{Na_2SO_4}$ \hfill (2) $\mathrm{KCl}$ \hfill (3) $\mathrm{BaSO_4}$ \hfill (4) $\mathrm{MnBr_2}$
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