Organic

What class are you in?

• 11X2A
• 11X2B
• 11Y2A
• 11Y2B
• Other

Select the best description of crude oil:

• It is an element.
• It is a compound.
• It is a mixture.
• It is an atom.

Which of the following properties is always different in different crude oil fractions?

• Colour
• The elements present
• The general formula
• Boiling point

Which two things are needed for cracking?

• Enzymes and high pressure
• Catalyst and heat
• Enzymes and low pressure
• Catalyst and steam

A chemist tests two unknown compounds, one is an alkane and one is an alkene. She mixes both compounds with bromine water. Which statement is true?

• Bromine water is colourless.
• When bromine water is added to an alkene it will be orange.
• There will be no colour change when bromine water is added to an alkane.
• When bromine water is added to an alkane it will be colourless.

A straight chain alkane has 67 carbon atoms. How many hydrogen atoms are in the alkane?

• 268
• 136
• 67
• 134

What alkane is shown in the diagram?

• Propane
• Butane
• Hexane
• Methane