If a rock contains copper, then the rock will be of which colour ?

Correct option is C

Correct Answer: (C) Blue and Green
Explanation:

→ Copper-bearing rocks and minerals commonly show blue and green colours.
→ These colours appear due to oxidation and chemical reactions of copper with air and water.
→ Minerals like malachite (green) and azurite (blue) are classic copper ores.
→ Hence, the presence of copper in rocks is often identified by blue or green shades.

Information Booster:
→ Copper ores are important metallic minerals.
→ Malachite is a green copper carbonate mineral.
→ Azurite is a blue copper carbonate mineral.
→ Copper has been used since ancient times for tools and coins.
→ Colour is an important clue in identifying minerals.

Additional Information (Other Options):
Option (A) Red: Usually indicates iron oxide (hematite).
Option (B) Yellow: Often associated with sulphur or gold-bearing minerals.
Option (D) Brown: Commonly linked with iron-rich rocks, not copper