Which one of the following minerals is formed by decomposition of rocks, leaving a residual mass of weathered material?

• Coal

• Bauxite

• Gold

• Zinc

Which one of the following minerals is contained in the monazite sand?

• Oil

• Uranium

• Thorium

• Coal

Koderma, in Jharkhand is the leading producer of which one of the following minerals?

• Bauxite

• Mica

• Iron-ore

• Copper

Minerals are deposited and accumulated in the stratas of which of the following rocks?

• Sedimentary rocks

• Metamorphic rocks

• Igneous rocks

• None of the above

Distinguish between the following in not more than 30 words.

 Ferrous and Non-ferrous minerals.