Which of the following elements does hydrogen react with?

Heated cupric oxide

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Heated ferric oxide

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Heated stannic oxide

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Heated aluminium oxide

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Solution

The correct option is D
Heated aluminium oxide

Generally at high temperature hydrogen reacts with non-metals and metals.Non -metals like nitrogen, sulphur, chlorine etc and some high electropositive metals like sodium, potassium and calcium react with hydrogen to form compounds called hydrides.Also, hydrogen displaces the less electropositive copper metal from its oxide.

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