When treated with conc. HNO_(3) aluminium is rendered "………….." due to the formation ofprotective layer of its "………….." on the surfaceof the metal.

When treated with conc. HNO_(3) aluminium is rendered "………….."

1.	When treated with conc. HNO_(3) aluminium is rendered "………….." due to the formation ofprotective layer of its "………….." on the surfaceof the metal.
Answer» ANSWER :PASSIVE, OXIDE