Question

The type of coal that is used mainly for commercial use is __________.

• A. Anthracite
• B. Lignite
• C. Peat
• D. Bituminous

Answer 1

The correct option is D Bituminous

• Type of coal that is used commercially is bituminous coal. Bituminous coal or black coal is a relatively soft coalcontaining a tar like substance calledbitumen.
  
• This coal is graded based on plasticity, moisture content, volatility and ash content.
  
• Plasticity is essential for the production coke which is useful in making fuel gases like producer gas etc.
  
• Volatility is essential for steel making and power generation.