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Q: The igneous rock rich in cavities is
  • A. Granite
  • B. Basalt
  • C. Gabbro
  • D. Dolomite
Correct Answer: Option D - The igneous rock rich in cavities is dolomite dolomite is used as a source of magnesium metal and of magnesia, which is a constitutional of refractory bricks. Dolomite is used mainly in iron and steel industry as a fluxing agent and also used in construction industry.
D. The igneous rock rich in cavities is dolomite dolomite is used as a source of magnesium metal and of magnesia, which is a constitutional of refractory bricks. Dolomite is used mainly in iron and steel industry as a fluxing agent and also used in construction industry.

Explanations:

The igneous rock rich in cavities is dolomite dolomite is used as a source of magnesium metal and of magnesia, which is a constitutional of refractory bricks. Dolomite is used mainly in iron and steel industry as a fluxing agent and also used in construction industry.