Propene can be made by using heat to decompose large alkane molecules into smaller, more useful molecules.
This process is known as:

Molecules of propene can be combined to form a molecule of poly(propene).
Which of these shows part of the structure of a molecule of poly(propene)?
[5CH1H_01_que_20150514]

In the following diagrams, X and Y are atoms of different elements.
Which diagram correctly shows the arrangement of outer electrons in a molecule of methane?
[0620_w15_qp_13 Q4]

The diagram shows the flame produced from burning a hydrocarbon, acetylene, in a welding torch.
Which gas is X?
[0620_w15_qp_13 Q28]

Carbon monoxide is an air pollutant produced when petrol is burned in a car engine.
Why is carbon monoxide considered to be an air pollutant?

Unwanted vegetation is sometimes placed in a bin where it decays to form compost. This compost can be used to fertilise soils.
Which gas is likely to be present in a higher percentage inside the bin than in the air outside the bin?

What are the names of the compounds shown in the reaction scheme at the left?
[0620_w15_qp_13 Q35]

Which row describes the formation of a polymer?
[0620_w15_qp_13 Q36]

Which row shows the correct use of a fraction obtained by the fractional distillation of petroleum?
[0620_w15_qp_13 Q37]

Ethanol can be formed by:
1 fermentation
2 reaction between steam and ethene

Which of these processes uses a catalyst?
[0620_w15_qp_13 Q38]

The structures of four compounds are shown.
Which are members of the same homologous series?
[0620_w15_qp_13 Q39]