Enter Title

Hydrocarbons and crude oil

100

Which elements make up hydrocarbons?

C and H

200

What is an isomer?

Molecules with the same molecular formula but different structural formula

300

Crude oil is a mixture of different hydrocarbons. these hydrocarbons have different boiling points. Choose the correct order of the fractions below from highest to lowest.

Fuel oil, diesel, kerosene, gasoline

400

From the four liquid fractions (fuel oil, diesel, kerosene, gasoline) produced from the fractional distillation which is the least viscous?

Gasoline

500

Which fraction of crude oil is used as a fuel for large ships

Fuel oil

Alkanes

100

The formula for an alkane with 14 carbons would be

C₁₄H₃₀

200

Which one of the following is a poisonous gas produced as the result of the incomplete combustion of hydrocarbons?

CO

300

Alkanes undergo substitution reactions in the presence of UV light. Write the correct reaction of ethane and chorine in the presence of UV light

CH₃CH_3(g) + Cl_2(g) → CH₃CH₂Cl_(g) + HCl_(g)

400

How many isomers are there for the compound C₅H₁₂?

3

500

Select the correct combination of catalyst and temperature for the cracking of hydrocarbons

Temp: 600C, Catalyst: Silicon dioxide and aluminium oxide

Alkenes

100

What is the functional group of the alkene homologous series?

A carbon-carbon double bond.

200

Why are alkenes described as unsaturated

They contain carbon-carbon double bonds and these carbon atoms do not have as many hydrogen atoms as they possibly could

300

If an alkene is added to bromine water what would the result be?

The bromine water changes from orange to colourless

400

Alkenes are very valuable chemicals and so are not burned as fuel. However, if they were write the correct equation for the combustion of ethene?

C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(l)

500

Describe the conditions needed to convert ethene and steam into ethanol

• Temperature: 300C
• Pressure: 60-70 atm
• Catalyst: Phosphoric acid

Alcohols and Carboxylic acids

100

Select the functional group found in alcohols

OH

200

Correctly display formula for the functional group found on a carboxylic acid

COOH

300

Which carboxylic acid is found in an aqueous solution as vinegar?

Ethanoic acid

400

Ethanol can be oxidised in a number of ways. Which one of the following is not a method of oxidising ethanol?

• Combustion in oxygen
• Heating in the presence of potassium dichromate(VI) in dilute sulfuric acid
• Fermentation
• Microbial oxidation

Fermentation

500

What name is given to the process that yeast use to turn glucose into ethanol in the absence of air?

Fermentation

Polymers

100

Which of the following is not an addition polymer?

• Polyethene.
• Polyester.
• Poly(propene).
• Poly(chloroethene).

• Polyester.

200

Which ester is produced when ethanol and ethanoic acid react?

• Ethyl ethanoate.

300

Which polymer is used to make non-stick pans

teflon CF2=CF2

400

Show the condensation polymerisation reaction

Dicarboxylic acid + A diol -> Polyester + Water

500

Which of the following leads to problems disposing of addition polymers?

They produce toxic chemicals when burned.