Question

When iron rusts, its weight .....
A) decreases B) increases C) remains the same D) first increases and then decreases

Answer 1

Answer:

The correct option is B) increases.

Rust is nothing but an oxidised form of iron. Thus, when the rust forms above the iron object, the mass of oxygen is added on with the mass of iron, and that is, the weight of the object is increased. When iron rusts, the weight increases.

Explanation:

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