Statement (1): The chemical formula of Rust is $Fe 2 O 3 ⋅ XH 2 O$
Statement (2): The composition of German Silver is $25 − 50 % copper$ $24 − 35 % zinc$ , and $10 − 35 % nickel$ .
Statement (3): Duralimine is used in making some parts of aero planes.

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All the above statements are correct

All the above statements are incorrect

A and B are correct but C is incorrect

A and B are incorrect but C is correct

answer is A.

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Detailed Solution

Iron undergoes oxidation in presence of air and moisture forms rust.

German Silver is alloy containing

$25 − 50 % copper$

$24 − 35 % zinc$ $10 − 35 % nickel$ it is useful in making utensils and artistic materials.

Duralumin is a soft, ductile, light weight, high strength and less corrosion.

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