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Introduction to d and f Block Elements

Aluminium bec...

Question

Aluminium becomes less reactive or passive in presence of:

A

Dilute

H C l

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B

Aqueous

N a O H

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C

Concentrated Nitric acid

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D

All of the above

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Solution

The correct option is C Concentrated Nitric acid
Concentrated nitric acid renders aluminium passive by forming a protective oxide layer on the surface.

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