why does the reactivity of aluminium decreases if it is dipped in nitric acid
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When Al is dipped in HNO3 ,as its a oxidizing agent ....a layer of Al oxide is formed on the metal. It happens because HNO3 is a strong oxidizing agent. The layer of aluminium oxide prevents further reaction of aluminium. because of this, the reactivity of aluminium decreases.
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Answer:due to the formation of a coating of aluminum oxide. Al2
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