Question

The presence of is essential for rusting.​

Answer 1

Answer:

Explanation:

moisture and air

Answer 2

Answer:

The presence of water vapour, moisture and air is essential for rusting.

Explanation:

Rust is a general term for a series of iron oxides, usually, red oxides, formed by the reaction of iron with oxygen in the presence of water or air moisture.

Water is usually present in the form of water vapour and oxygen is always present in the normal atmosphere.

The oxygen needs moisture as a catalyst and reactant to accelerate the reaction, so in the absence of moisture, iron won't rust.

So the presence of water vapour, moisture and oxygen are required to form rust from metal iron.

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