Question

The least pure commercial form of iron is ______.

Options

• cast ion

• wrought iron

• steel

• haematite

Answer 1

The least pure commercial form of iron is cast ion.

Explanation:

Cast iron is the least pure commercial form of iron. It contains about 2.5% to 5% carbon along with other impurities like silicon, phosphorus, and sulphur. It is brittle and used where hardness is more important than strength.