WorksheetsGCSE Chemistry Paper 2: Organic Chemistry
Total questions: 15
Worksheet time: 22mins
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.
Identify the Alkanes
Butane
Propene
The general formula for an alkane is:
CnH (a)
Complete the Alkane formula:
C6H (a)
Match the following
C7H__
16
C3H8
Propane
C8H__
18
C_H20
9
C_H10
4
Reorder the following
Methane
C3H8
Butane
What part of the column is hottest?
Where are the smallest hydrocarbons collected?
Where are the largest hydrocarbons collected?
Reorder the following
Crude oil is vaporised
Before entering the column
The column is hottest at the bottom
Larger molecules condense lower down
Small hydrocarbons have a very low boiling point
Collected at the top of the column
The length of the hydrocarbon affects its boiling point
Boiling points separate hydrocarbons
Match the statements
Hydrocarbon series with no double bonds
Alkanes
Hydrocarbon series with double bonds
Alkenes
A method of separating hydrocarbons
Fractional Distillation
A method of splitting larger hydrocarbons into smaller ones
Cracking
Turns from orange to clear with alkenes
Bromine Water
Match the following
Small hydrocarbons can be used as fuel and feedstock
Why is cracking carried out
More viscous
Large hydrocarbons
More flammable
Small hydrocarbons
Complete combustion
Oxygen is not limited
In-complete combustion
Produces Carbon Monoxide
Categorise these hydrocarbons based on if they will de-colour bromine water
Ethene
C3H6
CH4
Ethane
Cracking splits (a) hydrocarbons into (b) hydrocarbons. This can be done using a (c) or steam . There will only be one (d) produced and one or more (e)
C102H206 --> C50H102 + C (a) H104
