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Preparations and Uses of Caustic Soda

The compound ...

Question

The compound rust is a hydrated oxide of

A

copper

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B

aluminium

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C

gold

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D

iron

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Solution

The correct option is D
iron

When iron reacts with oxygen in presence of moisture a new reddish-brown substance is formed which is called rust. This rust is a hydrated oxide of iron.

Therefore, option c is correct here.

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Preparations and Uses of Caustic Soda

Standard XII Chemistry

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