Statement (A): The chemical formula of Rust is ${Fe}_{2} O_{3} \cdot {XH}_{2} O$ .
Statement (B): The composition of German Silver is 25 - 0% copper, 24 - 35% zinc and 10 - 35% nickel
Statement (C): Duralimine is used in making some parts of aeroplanes.

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All the statements are incorrect

A and B are correct and C in incorrect

A and B are incorrect and C is correct

All the statements are 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 - 0% copper, 24 - 35% zinc and 10 - 35% nickel, it is useful in making utensils and artistic materials.

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

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