Why does aluminium become passive when dipped in concentrated nitric acid?

Solution

When a strip of aluminium is dipped in concentrated nitric acid, it is oxidised to aluminium oxide (Al₂O₃). It forms a protective coating on the surface of the metal and checks further attack by the acid. Therefore, aluminium becomes passive.

Some More Questions From The p-Block Elements Chapter

What is inorganic benzene? Write its formula.

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The P-Block Elements

Why does aluminium become passive when dipped in concentrated nitric acid?

Some More Questions From The p-Block Elements Chapter

What is inorganic benzene? Write its formula.

Name a hydride of boron which is used as reducing agent in organic chemistry.

Does a molecule of BH₃ exist?

What is relative stability of +1 oxidation state in group 13.

Are all the B-H bonds in diborane equivalent?

What is tincal ?

What is tau or banana bond?

Name two elements used as semiconductors in electronic devices.

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NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

The P-Block Elements

Why does aluminium become passive when dipped in concentrated nitric acid?

Some More Questions From The p-Block Elements Chapter

What is inorganic benzene? Write its formula.

Name a hydride of boron which is used as reducing agent in organic chemistry.

Does a molecule of BH3 exist?

What is relative stability of +1 oxidation state in group 13.

Are all the B-H bonds in diborane equivalent?

What is tincal ?

What is tau or banana bond?

Name two elements used as semiconductors in electronic devices.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Does a molecule of BH₃ exist?