name the products obtained when coal is heated in the absence of air .

write any two uses of its products

When coal is heated in the absence of air the following products are formed:-

  1. coke
  2. gas carbon 
  3. coal tar
  4. ammonia liquor
  5. coal gas

Their uses are as follows :-

  • coke
  1. it is used as a household fuel
  2. it is used in extraction of minerals as it is an excellant reducing agent .
  3. it is used in manufacture of graphite.
  4. it is used to manufacture waterr gas.
  • gas carbon 
  1. it is used for making electrodes for dry cell
  2. it is used forr the extraction of aluminium metal from its molten bauxite ore.
  • coal tar - it is when supjected to fractional distillation the following products are formed :-
  1. toulene - used for making DDT and TNT.
  2. benzene - used for making BHC.
  3. phenol - used for making dyes.
  4. napthalene - used as moth repellant .
  • Ammonia liquor 
  1. used as an artificial ferrtiliser
  • coal gas
  1. used as a household fuel .
  2. used as industrial fuel.

  • 4

when coal is heated in the absence of air we get:-

(i) coke- it is used in the manufacture of steel, and in the extraction of metals

(ii) coal tar-as it a mixture of 200 compounds it is used as the starting materials in industries like dyes, paints, perfumes etc.

(iii) coal gas- in olden times it was used for lighting street light, mainly used as as a fuel in industries.

  • 1

heating a substance in the absence of air is known as destructive distillation.destructive distiilation of coal produces coke,coal gas , coal tar, pyroligneous acid

  • 5

coke

coal gas

coal etc

  • 0

sabka malik ek

  • -1

coke

coal tar

coal gas

  • 2

when coal is heated in the absence of air it gives out 3 substances they are :-

1)coke=it is used in the manufacture of steel and in the extraction of many metals

2)coal tar=it is used in manufacturing various materials such as synthetic dyes, drugs, explosives, perfumes, plastics,

 paints, photographic materials, roofing materials and etc..

3)coal gas=it is used as fuel in many industries situated near the coal processing plants

  • 4
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