Question
How is dioxygen prepared in laboratory from $KClO_3?$
✓
Answer
By heating chlorates, nitrates and permanganates.
Potassium chlorate in the presence of manganese dioxide on heating decomposes to form potassium chloride and oxygen.$2 KClO _3 \underset{ MnO _2}{\stackrel{\Delta}{\longrightarrow}} 2 KCl +3 O _{2(g)}$
Potassium chlorate in the presence of manganese dioxide on heating decomposes to form potassium chloride and oxygen.$2 KClO _3 \underset{ MnO _2}{\stackrel{\Delta}{\longrightarrow}} 2 KCl +3 O _{2(g)}$
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