Hydrocarbons in order cGCSE

A homologous series is series of compounds which

• have the same general formula

• differ from each other by a -CH₂ group in the molecular formula

• show a gradual change in physical properties

• have similar chemical properties

How can you tell these molecules all belong to the same homologous series?

• They have the same general formula

• They all start with C

• They all have more H than C

• They are hydrocarbons

• The have different boiling points

Which are hydrocarbons?

• A

• B

• C

• D

• none of them

These molecules belong to the homologous series called ...

• alkanes

• alkenes

This structure belongs to the homologous group called ...

• alkane

• alkene

Which general formula fits homologous series B

• C_nH_2n

• C_nH_2n+2

Tick all the molecules that are hydrocarbons

• A

• B

• C

• D

Which letter molecule would be the least viscous ?

All homologous molecules differ from each other by CH₂ in the formula.

What should X be?

All homologous molecules differ from each other by CH₂ in the formula.

What should K be?