railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry Classification of Elements and Periodicity in Properties
Which of the following statements regarding coal is NOT correct?
1
Anthracite is the highest quality hard coal.
2
Coal that has been buried deep and subjected to increased temperatures is bituminous coal.
3
Lignite is a low-grade brown coal, which is soft with high moisture content.
4
Metallurgical coal is high grade lignite coal which has a special value for smelting iron in blast furnaces.