GCSE Chemistry Paper 2: Organic Chemistry

Crude oil is ​ (a)   , meaning it will eventually run out. It is a ​ (b)   of hydrocarbon molecules, formed from the ​ (c)   of ancient organisms buried under mud.

• finite
• mixture
• biomass
• infinite
• shells
• formulation

Identify the Alkanes

• Butane

• 
• Propene

• 
• 

The general formula for an alkane is:

C​_nH ​ (a)  

• 2n+2
• 2n
• 2n+1
• n+2

Complete the Alkane formula:

C₆H_{__}

Match the following

• 9

• C_{_}H₁₀

• Propane

• C₈H__

• 4

• C₃H₈

• 18

• C₇H__

• 16

• C_{_}H₂₀

Reorder the following

• 
• Butane

• Methane

• C₃H₈

• 

What part of the column is hottest?

Where are the smallest hydrocarbons collected?

Where are the largest hydrocarbons collected?

Reorder the following

• Before entering the column

• The length of the hydrocarbon affects its boiling point

• Boiling points separate hydrocarbons

• Crude oil is vaporised

• Larger molecules condense lower down

• The column is hottest at the bottom

• Collected at the top of the column

• Small hydrocarbons have a very low boiling point