Chemistry
State in brief the transformation of vegetable matter to different types of coal varying in carbon content. State two uses each of
(a) coal
(b) coke
(c) lampblack or soot
Carbon
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Answer
Coal is formed by slow bacterial decomposition of vegetable matter. It is formed under the influence of heat, pressure & limited air, over millions of years. The different stages of transformation of vegetable matter results in a residue rich in varying amounts of carbon, hence giving different types of coal
- Peat [60% C]
- Lignite [65% C]
- Bituminous [85% C]
- Anthracite [90% C ]
(a) Uses of coal —
- Mainly as a cheap fuel.
- Manufacture of coke, coal gas and synthetic petrol.
(b) Uses of coke —
- As a fuel.
- As a reducing agent in the iron & steel production.
(c) Uses of lampblack or soot —
- For making printers ink, black shoe polish, typewriter ribbons & black paints.
- As a filler in rubber tyres.
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