Heating of some materials produces coal . With increasing temperature and time , one observes : A ) Peat , lignite , anthracite , bituminous . B )...
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5.

Heating of some materials produces coal. With increasing temperature and time, one observes:A) Peat, lignite, anthracite, bituminous.

B) Anthracite, bituminous, peat, lignite.C) Peat, anthracite, lignite, bituminous.D) Peat, lignite, bituminous, anthracite.E) Anthracite, lignite, bituminous, peat.
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