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The general formula of alkanes is:

• 1 CnH2n-2
• 2 CnH2n
• 3 CnH2n+2
• 4 CnHn

The simplest alkene is:

• 1 Propane
• 2 Ethene
• 3 Methane
• 4 Ethyne

Which hydrocarbon has a triple bond?

• 1 Ethene
• 2 Ethyne
• 3 Methane
• 4 Ethane

Alkenes decolourise bromine water because they are:

• 1 Acidic
• 2 Unsaturated
• 3 Saturated
• 4 Ionic

Complete combustion of methane gives:

• 1 Carbon and water
• 2 Carbon dioxide and water
• 3 Methanol
• 4 Carbon monoxide and hydrogen

The number of carbon atoms in propane is:

• 1 3
• 2 4
• 3 2
• 4 5

The number of hydrogen atoms in ethene, C2H4, is:

• 1 6
• 2 2
• 3 8
• 4 4

Polythene is made from many molecules of:

• 1 Ethane
• 2 Methane
• 3 Ethene
• 4 Ethyne

The general formula of alkenes is:

• 1 CnH2n+2
• 2 CnH2n
• 3 CnHn
• 4 CnH2n-2

Natural gas is mainly:

• 1 Benzene
• 2 Butane
• 3 Methane
• 4 Ethene