Coal is processed in industries to produce
- Coke
- Coal Tar
- Coal Gas
Let's study them one by one
Coke
It is pure form of carbon
It is tough, porous(liquid or air can pass through it) and black in colour
Uses
- It is used as reducing agent in the extraction of metals
- It is used in the manufacturing of steel.
- It is used as a fuel
Coal Tar
It is black thick liquid
It is a mixture of 200 different substances like naphthalene,benzene etc
Uses
- It is used to make synthetic dyes, drugs, explosives, perfumes, plastics, paints, photographic materials
- Naphthalene balls which is used to repel moths and other insects is also obtained from coal tar
Note:
Coal tar was also used to make roads (to do metalling of roads).But these days, petroleum product bitumen is used to for metalling of roads
Coal Gas
When coal is processed to make coke, coal gas is produced
Uses
- It is used as fuel in many industries
- It is also used as source of heat and light
How are Coke,Coal Tar and Coal Gas Obtained?
When Coal is heated in absence of air .
- It produces gas which is called coal gas.
-
It produces liquid which is called coal tar
- A solid residue is also produced which is called coke
Difference between Coke, Coal Tar and Coal Gas
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Questions
NCERT Question 7 - Describe characteristics and uses of coke.
NCERT Question 5 (c) - Tick True/False against the following statements.
Coke is almost pure form of carbon. (T/F)
NCERT Question 5 (d) - Tick True/False against the following statements.
Coal tar is a mixture of various substances. (T/F)
