Question

X is a rock mineral that is mined from sedimentary rocks. A form of X is also used to make chalk. From the following statements, select all that are true about X.

• A. India is the largest producer and exporter of X.
• B. X is found with rocks having calcium carbonates or calcium and magnesium chlorides.
• C. X is used in smelting iron ores in blast furnaces.
• D. Cement industires heavily rely on X as a raw material.

Answer 1

Answer: (C), (D)

The correct options are
C X is used in smelting iron ores in blast furnaces.
D Cement industires heavily rely on X as a raw material.

X is limestone. Limestone is a rock mineral that can be mined from sedimentary rocks. We will be able to find limestone in rocks having calcium carbonates or calcium and magnesium carbonates. Limestone is an essential raw material in the cement industry.
It is also used in smelting iron ores in blast furnaces. It removes impurities like silica, phosphorus, and sulfur present in the ore.