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Hydrogen can reduce copper oxide but not aluminium oxide. Explain

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Potential -Potassium
Scientist -Sodium
Can -Calcium
Make -Magnesium
A-Aluminium
Zoo-Zinc
In-Iron
Low-Lead
Hydrogen -Hydrogen
Countries -Copper
Melt-Mercury
Silver&-Silver
Gold -Gold
From the starehe Girls COOL TEACHER 

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Because aluminium is more reactive than the hydrogen hence hydrogen cannot reduce aluminium oxide

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Because aluminum is more  reactive than hydrogen hence hydrogen cannot remove the combined oxide in aluminum

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