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What product(s) is/are formed when aluminum metal is treated with concentrated nitric acid?

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in Chemistry – Class 12 by (188k points)
What product(s) is/are formed when aluminum metal is treated with concentrated nitric acid?

(a) Al (NO3) 3

(b) Al (NO2) 3 + H2

(c) Al2O3

(d) Al4O3

I got this question during an online interview.

The question is from P-Block Elements in division P-Block Elements of Chemistry – Class 12

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Correct option is (c) Al2O3

The best explanation: Aluminum does not dissolve in nitric acid. This is because treatment with nitric acid results in the formation of a tough oxide layer. This oxide layer prevents it from further reacting with the oxide. Hence, the compound formed is Al2O3 i.e. aluminum (III) oxide.

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