\(1) SO_2 + 2H_2S \to S + 2H_2O\\ 2)2 NH_3 + \dfrac{5}{2}O_2 \xrightarrow{Pt,300^oC} 2NO + 3H_2O\\ 3) 2Al + 2H_2O + 2NaOH \to 2NaAlO_2 + 3H_2\)
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