Q25 of 269 Page 131

The main constituent of petroleum gas is:

Petroleum gas consist mainly of butane with a very small amount of ethane and propane.

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24

Which fossil fuels were formed by the buried remains of large land plants?

 24

Which fossil fuel was formed by the buried remains of large land plants?

 26

The natural gas consist mainly of:

 27

Which of the following is not produced by the burning of fossils fuels?