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ICSE Class 8 Chemistry Question 11 of 17

Carbon & Its Compounds — Question 17

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Question

Question 9

Give two uses for each of the following:

(a) coal

(b) coke

(c) wood charcoal

(d) sugar charcoal

(e) bone charcoal

(f) lamp black

Answer

(a) Coal

  1. It is used both as a domestic and industrial fuel.
  2. It is used to prepare coke, coal gas and coal tar.

(b) Coke

  1. It is used in the manufacture of water gas (CO + H2), producer gas (CO + N2) and artificial graphite.
  2. It is used as a smokeless industrial and domestic fuel.

(c) Wood charcoal

  1. It is an important constituent of gun powder.
  2. Due to its high adsorbing capacity, it is used in military and industrial gas masks to adsorb harmful gases and in water purifier filters.

(d) Sugar charcoal

  1. It is used to prepare artificial diamonds.
  2. It is used mostly as a reducing agent to extract metals from their respective oxides.

(e) Bone charcoal

  1. It is used to decolourise cane sugar in the process of manufacturing sugar.
  2. It is used to remove excess of fluoride from water which causes tooth decay.

(f) Lamp black

  1. It is used in making black shoe polish, carbon paper, printing ink, black paint etc.
  2. It is used in manufacture of tyres and gun powder.