Question

Dolomite is a lime stone that contains carbonate of magnesia up to:
1. 35%
2. 15%
3. 25%
4. 45%

Answer 1

Correct Answer - Option 4 : 45%

Explanation: 

Limestone: It is a sedimentary rock composed primarily of calcite, a calcium carbonate mineral with a chemical composition of CaCO3.

Dolomite: It is a mineral composed of calcium and magnesium carbonate combined in equal molecular property, expressed by the formula CaMg(CO₃)_2.

Dolomite contains a 45% carbonate of magnesia.