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Reactivity with Air and Water (Group 2)

Which of the ...

Question

Which of the following metal is protected by a layer of its own oxide?

A

Silver

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B

Sodium

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C

Aluminium

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D

Iron

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Solution

The correct option is C Aluminium
Aluminium is reactive and reacts spontaneously with water or air to form aluminium oxide $(A l_{2} O_{3})$ , forms a stable passive layer which protects aluminium from corrosion or further oxidation.

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