Pick out the incorrect statement: (1) \( \mathrm{MnO}_{2} \) dissolves in dilute \( \mathrm{HCl}...

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Pick out the incorrect statement:
(1) \( \mathrm{MnO}_{2} \) dissolves in dilute \( \mathrm{HCl} \), but does not form \( \mathrm{Mn}^{4+} \) ions
(2) \( \mathrm{MnO}_{2} \) oxidizes hot concentrated \( \mathrm{H}_{2} \mathrm{SO}_{4} \) liberating oxygen
(3) \( \mathrm{K}_{2} \mathrm{MnO}_{4} \) is formed when \( \mathrm{MnO}_{2} \) is fused with \( \mathrm{KOH} \) in presence of \( \mathrm{KNO}_{3} \)
(4) Decomposition of \( \mathrm{KMnO}_{4} \) is not catalysed by sunlight.
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