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JEE Main levelSingle correct optionDifficulty 2 of 3pb021

Aluminium vessels can be used to transport concentrated nitric acid because

Aa thin, tough, adherent layer of $Al X_{2} O X_{3}$ forms and makes the metal passive
Baluminium does not form an oxide in acid
Caluminium is less reactive than hydrogen
Dconcentrated $HNO X_{3}$ reduces the oxide to $Al$

Answer: A

Conc.

HNO X_{3}

is oxidising and forms a protective oxide film on aluminium, which stops further attack. This is passivation.

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