Alkanes

What is the general formula for alkanes?

• CnHn+2

• CnH2n

• CnHn

• CnH2n+2

What type of hydrocarbons are alkanes?

• Aliphatic

• Aromatic

• Saturated

• Unsaturated

How do alkanes differ in their molecular formulae from neighbouring members of their series?

• Differ by C2H4

• Differ by CH2

• Differ by CH4

• Differ by CO2

What is the molecular formula of decane?

• C10H24

• C10H12

• C10H22

• C10H20

What is the molecular formula of hexane?

• C6H12

• C6H10

• C6H14

• C6H16

What property is NOT a characteristic of alkanes?

• Having similar chemical properties

• Showing a gradual variation in physical properties

• Having the same general formula

• Containing carbon-to-carbon double bonds

What is a homologous series?

• A series of elements with similar properties

• A series of compounds with different functional groups

• A group of inorganic compounds that react similarly

• A 'family' of organic compounds with similar chemical properties

What does it mean if a hydrocarbon is saturated?

• It can dissolve a large amount of substance

• It has a high level of carbon-to-hydrogen bonds

• It contains only carbon-to-carbon single bonds

• It contains at least one carbon-to-carbon triple bond

What is the significance of the boiling points of alkanes?

• They increase with increasing molecular weight

• They are all the same regardless of molecular weight

• They are not affected by molecular weight

• They decrease with increasing molecular weight

Which of the following is NOT a use of alkanes?

• Fuel

• Lubricants

• Plastics

• Conducting electricity