Question

Fill ups.
1.lignite has less _______ content than anthracite.
2.Natural gas mainly made up of_______.
3.the slow process of conversation of coal_______.
4.___________a fractional product of petroleum used for making candles.​

Answer 1

Answer:

1) carbon

2) methane

3) carbonification

4) Wax or paraffin

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Answer 2

Answer:

1.carbon

2.methane

3.carbonisation

4.paraffin