Question

what is known as oxidation ? What effect does it have on the colour of rocks​

Answer 1

Answer:

Oxidation means reaction of minerals in rocks to atmospheric oxygen. When the atmospheric oxygen comes in contact with iron-compounds in rocks, the iron starts rusting or crumbling. The colour of the rock changes to red, yellow or brown.

Explanation:

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Answer 2

Answer:

Oxidation is the loss of electrons during a reaction by a molecule, atom or ion. Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. The opposite process is called reduction, which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases.

Explanation:

When the atmospheric oxygen comes in contact with iron-compounds in rocks, the iron starts rusting or crumbling. The colour of the rock changes to red, yellow or brown.