Alkenes & Polymers quiz

1. What is used to test if something is an alkane or and alkene?

Benedict\'s reagent

Bromine water

Starch

Silver nitrate

Question 1 of 29

2. When lots of these molecules have their double bond broken and they all join together into a long chain, what is the new molecule called?

polychloroethane

chloroethene

polytetrachloroethene

polychloroethene

Question 2 of 29

3. What is the name of this molecule?

ethanol

ethene

methane

ethane

Question 3 of 29

4. State the general formula for alkenes

CₙH₂ₙ

CₙHₙ

CₙHₙ₊₁

CₙH₂ₙ₊₂

Question 4 of 29

5. Describe the trend in viscosity of the main fractions in crude oil

Viscosity increases as the number of carbon atoms (chain length) decreases

Viscosity increases as the number of carbon atoms (chain length) increases

Viscosity increases as boiling point decreases

Viscosity increases as boiling point increases

Question 5 of 29

6. Why does incomplete combustion occur?

When the fuel is wet

When there is an insufficient supply of water

When there is an insufficient supply of oxygen for complete combustion

When there is reduced fuel avaliable

Question 6 of 29

7. What is a general formula?

A series of compounds with similar chemical properties and a trend in physical properties

A formula to determine the structure of a general series, i.e it shows which isomers are part of the general series and which aren\'t

A formula to determine the exact number of different types of atom in a molecule, e.g. C₂H₄ for ethene

A formula to show the relative quantity of different types of atom for a molecules in a homologous series. Eg CₙH₂ₙ₊₂ for alkanes

Question 7 of 29

8. Would methane normally react with bromine?

No (because it is saturated)

Yes (to produce bromomethane and hydrogen bromide)

Only if the temperature is over 500⁰C

Only if the pressure is greater than 2 atm

Question 8 of 29

9. Name this molecule

butane

but-2-ene

polybut-1-ene

2-methylpropene

Question 9 of 29

10. What is crude oil?

An oily liquid

A mixture of alkanes

A mixture of hydrocarbons

A mixture of alcohols

Question 10 of 29

11. Explain the term hydrocarbon

A hydrocarbon is an organic molecule

A hydrocarbon is a molecule that is in a homologous series

A hydrocarbon is a molecule that comes from crude oil

A hydrocarbon is a molecule containing only hydrogen and carbon

Question 11 of 29

12. Recall a use of bitumen

Fuel for ships

Fuel for aeroplanes

Surfacing roads

Fuel for lorries

Question 12 of 29

13.

What is the functional group of an alkene?

>C=C< (a carbon-to-carbon double bond)

>C-OH< (a carbon to OH bond)

>C-C< (a carbon-to-carbon single bond)

>C-NH₂< (A carbon to nitrogen bond)

Question 13 of 29

14. State the general formula of alkanes

CₙH₂ₙ

CₙHₙ₊₁

C₂ₙH₂ₙ₊₂

CₙH₂ₙ₊₂

Question 14 of 29

15. What is meant by the term biodegradable?

Able to be broken down by microorganisms

Persists in the environment

Able to be broken down by UV radiation

Toxic to the environment

Question 15 of 29

16. In what type of reaction is an atom or group of atoms added to a molecule without taking anything away?

Substitution reaction

Addition reaction

Synthesis reaction

Decomposition reaction

Question 16 of 29

17. Explain what an addition polymer is

An addition polymer is a compound made from an alcohol and a carboxylic acid

An addition polymer is a long chain containing alternating double and single bonds

An addition polymer is a large molecule made by adding many small molecules (each containing a double bond) together to form one much larger molecule

An addition polymer is a long chain alkane found in crude oil

Question 17 of 29

18. What is the name of the process in which crude oil is separated into its various components?

Fractional distillation

Crystallisation

Filtration

Simple distillation

Question 18 of 29

19. What type of reaction takes place when bromine reacts with an alkene?

Synthesis

Addition

Decomposition

Substitution

Question 19 of 29

20.

A student has been asked to draw all the alkene isomers of C₄H₁₀ and draws the following. Which of the following statements about the student's diagram is correct?

The student is wrong. The molecule on the right is just normal butane. Bending the end round doesn't change that.

The student is wrong because she makes no reference to the numbers of protons and neutrons in the molecules.

The student is wrong. There is another isomer called 1,2-dimethylethane.

The student is correct and deserves a tuck-shop voucher.

Question 20 of 29

21. What is a fuel?

A fuel is a liquid used in electrolysis

A fuel is a substance that, when burned, releases heat energy

A fuel is a substance that is used to power vehicles

A fuel is a substance that contains chemical energy

Question 21 of 29

22. Recall all the possible products of the incomplete combustion of alkanes

Carbon monoxide, carbon dioxide and water

Hydrogen, carbon monoxide and water

Carbon, carbon monoxide, carbon dioxide and water

Carbon dioxide and water

Question 22 of 29

23. Explain why cracking is an important process in the oil industry

Cracking converts long chain hydrocarbons into short chain hydrocarbons. Crude oil contains a surplus short chains. Shorter chain hydrocarbons are in greater demand, e.g. petrol. Cracking also produces alkenes which are used in making polymers and ethanol.

Cracking converts long chain hydrocarbons into short chain hydrocarbons. Crude oil contains a surplus long chains. Shorter chain hydrocarbons are in greater demand, e.g. petrol. Cracking also produces alkenes which are used in making polymers and ethanol.

Cracking converts long chain hydrocarbons into short chain hydrocarbons. Crude oil contains a surplus long chains. Shorter chain hydrocarbons are in less demand, e.g. petrol. Cracking also produces alkenes which are used in making polymers and ethanol.

Cracking converts long chain hydrocarbons into short chain hydrocarbons. Crude oil contains a surplus short chains. Shorter chain hydrocarbons are in less demand, e.g. petrol. Cracking also produces alkenes which are used in making polymers and ethanol.

Question 23 of 29

24. State the conditions for the cracking of hydrocarbons

Aluminium oxide catalyst heated to 600°C

Manganese oxide catalyst heated to 200°C

Aluminium oxide catalyst heated to 200°C

Manganese oxide catalyst heated to 600°C

Question 24 of 29

25. What is the molecular formula for propene?

C₃H₈

C₅H₁₀

C₃H₆

C₅H₁₂

Question 25 of 29

26. This diagram shows one repeat unit of a polymer. Name the monomer used to make this polymer.

polytetrachloroethene

chloroethane

chloroethene

polychloroethene

Question 26 of 29

27. Explain the term saturated

A molecule containing only single bonds

A molecule that is usually a solid at room temperature

A molecule that is poisonous

A molecule that will not react with anything

Question 27 of 29

28. Explain the term functional group

A functional group is an atom or a group of atoms that determine the physical properties of a compound

A functional group is a series of compounds with similar chemical properties, a trend in physical properties and the same general formula

A functional group is a formula to show the relative quantity of different types of atom for a molecules in a homologous series. Eg CₙH₂ₙ₊₂ for alkanes

A functional group is an atom or a group of atoms that determine the chemical properties of a compound

Question 28 of 29

29. Explain the term unsaturated

A molecule containing a carbon-carbon double or triple bond

A poisonous molecule

A compound that is a liquid at room temperature

A molecule containing only single bonds

Question 29 of 29

Alkenes & Polymers quiz

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