Question

Q11:- Which among the following is the youngest variety of coal
(a) Anthracite
(b) Bituminous
(c) Lignite
(d) Peat​

Answer 1

Answer is (c) Lignite

Hope that helped :)

Answer 2

Answer:

(d)  Peat​ is the youngest variety of coal.

Explanation:

• Peat is the youngest type of coal, and it is light brown in colour. It has a low carbon content and produces less heat and smoke when burned. Its calorific value ranges between 10 and 15 kJ/g.
• Anthracite coal is the toughest coal with the highest carbon content. Because of the low volatile matter content, T+ burns slowly. As a result, it is mostly used in the industrial sector and not in the home. It has a calorific value of 28–30 kJ/g.
• Lignite is known as soft coal  It's also brown in colour and has a higher carbon content than peat. Its calorific value ranges between 15 and 20 kJ/g.
• Bituminous coal is the most prevalent type of coal found in homes. It's the most common f and Is more compact, black, and contains more carbon than peat and lignite, and produces more heat. It has a calorific value of 30 to 35 kJ per gramme.