Question

Why rusting of iron is a chemical change? *

A) Because it changes its colour

B) Because it makes iron powdery

C) Because a new substance is formed

D) None of these​

Answer 1

Explanation:

HEY MATE ..

A change in which one or more new substances are formed is known as chemical change.

For Example, when the iron is exposed to air and moisture, rust formation takes place. Rust is nothing but Iron Oxide; a new substance formed out of the reaction. The colour of the surface of the iron also changes. Hence, rusting of iron is a chemical change.

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Answer 2

Answer:

A change in which one or more new substances are formed is known as chemical change. For Example, when the iron is exposed to air and moisture, rust formation takes place. Rust is nothing but Iron Oxide; a new substance formed out of the reaction. ... Hence, rusting of iron is a chemical change.

Explanation:

B) Because it makes iron powdery