Question

why bricks are red in colour??​

Answer 1

Answer:

An oxidising kiln atmosphere also has an excess of oxygen. During firing, the minerals in the clay give colour to the brick as they absorb oxygen. Iron oxide is one of the most important minerals in clay for giving colour. It is what gives that typical red colour of  a bricks

   

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Answer 2

During firing, the minerals in the clay give red colour to the bricks as they absorb oxygen.