Question : Which one of the following is used in large quantities in Cement Industry ?

Option 1: Gypsum

Option 2: Limestone

Option 3: Coal

Option 4: Clay

Question : Which rock is found in association with rocks composed of calcium carbonates?

Option 1: Limestone

Option 2: Gold

Option 3: Iron

Option 4: Diamond

Question : Metamorphism changes rocks'

Option 1: Structure

Option 2: Texture

Option 3: Both (1) and (2)

Option 4: Actual chemical composition

Question : Pregnant women usually become deficient in

Option 1: Sodium and Calcium

Option 2: Iron and Sodium

Option 3: Calcium and Iron

Option 4: Magnesium and Iron

Question : The core of the Earth is made up of___________.

Option 1: cobalt and nickel

Option 2: iron and cobalt

Option 3: nickel and magnesium

Option 4: nickel and iron