Alkenes & Polymers quiz

1. What is the process of joining monomers together called?

Synthesis

Condensation

Decomposition

Polymerisation

Question 1 of 29

2. Why does incomplete combustion occur?

When there is an insufficient supply of oxygen for complete combustion

When the fuel is wet

When there is reduced fuel avaliable

When there is an insufficient supply of water

Question 2 of 29

3. State the names and molecular formulae of the first 5 alkanes

methane (CH₄), ethane (C₂H₆), tritane (C₃H₈), butane (C₄H₁₀), pentane (C₅H₁₂)

methane (CH₄), ethane (C₂H₆), propane (C₃H₈), butane (C₄H₁₀), pentane (C₅H₁₂)

methane (CH₄), ethane (C₂H₆), tritane (C₃H₈), tetrane (C₄H₁₀), pentane (C₅H₁₂)

methane (CH₄), ethane (C₂H₆), propane (C₃H₈), quatane (C₄H₁₀), pentane (C₅H₁₂)

Question 3 of 29

4. Explain how crude oil is separated into fractions

Crude oil is separated by fractional distillation. Crude oil is heated and the oil evaporates. It then goes into the tower. As the vapours rise up the tower the temperature rises. Different sized fractions condense at different heights because they have different boiling points. Smaller molecules condense high up in the tower. Larger molecules condense low down in the tower. Then the fractions are collected.

Crude oil is separated by fractional distillation. Crude oil is heated and the oil evaporates. It then goes into the tower. As the vapours rise up the tower the temperature rises. Different sized fractions condense at different heights because they have different boiling points. Larger molecules condense high up in the tower. Smaller molecules condense low down in the tower. Then the fractions are collected.

Crude oil is separated by fractional distillation. Crude oil is heated and the oil evaporates. It then goes into the tower. As the vapours rise up the tower the temperature falls. Different sized fractions condense at different heights because they have different boiling points. Larger molecules condense high up in the tower. Smaller molecules condense low down in the tower. Then the fractions are collected.

Crude oil is separated by fractional distillation. Crude oil is heated and the oil evaporates. It then goes into the tower. As the vapours rise up the tower the temperature falls. Different sized fractions condense at different heights because they have different boiling points. Smaller molecules condense high up in the tower. Larger molecules condense low down in the tower. Then the fractions are collected.

Question 4 of 29

5. Name this molecule

pent-1-ene

butane

pentane

propane

Question 5 of 29

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

pent-2-ene

polypentene

pent-1-ene

pent-4-ene

Question 6 of 29

7. What is the problem with burning addition polymers to dispose of them?

They explode when burnt

They are not flammable

They are non-biodegradable

They produce toxic gases when burned.

Question 7 of 29

8. What two things can be added together to produce a dibromoalkane?

An alkene and hydrogen bromide

An alkane, bromine and UV light

An alkene and bromine

An alkane and bromine

Question 8 of 29

9.

What is the functional group of an alkene?

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

>C-NH₂< (A carbon to nitrogen bond)

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

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

Question 9 of 29

10. What does the following diagram represent?

polybut-2-ene

but-2-ene

polybut-1-ene

but-1-ene

Question 10 of 29

11. Explain the term hydrocarbon

A hydrocarbon is a molecule that is in a homologous series

A hydrocarbon is an organic molecule

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. What is a fuel?

A fuel is a liquid used in electrolysis

A fuel is a substance that contains chemical energy

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

A fuel is a substance that is used to power vehicles

Question 12 of 29

13. A pupil has tried to write down various ways of representing ethane using: molecular formula, displayed formula, general formula, empirical formula and stuctural formula. However she has missed one out. Which one?

molecular formula

general formula

empirical formula

structural formula

Question 13 of 29

14. What are isomers?

Compounds with the same empirical formula but different molecular formulas

Molecules with the same molecular formula but with a different structure

Atoms with the same number of protons but different numbers of neutrons

Solutions with the same ratio of ions but different concentrations

Question 14 of 29

15. 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 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 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 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 15 of 29

16. Recall a use of gasoline

Cooking

Fuel for aeroplanes

Fuel for cars

Fuel for lorries

Question 16 of 29

17. Explain the term unsaturated

A molecule containing only single bonds

A compound that is a liquid at room temperature

A poisonous molecule

A molecule containing a carbon-carbon double or triple bond

Question 17 of 29

18. What is crude oil?

A mixture of alkanes

A mixture of alcohols

A mixture of hydrocarbons

An oily liquid

Question 18 of 29

19. Write a chemical equation for the cracking of decane

C₁₀H₂₀ → C₂H₄ + C₈H₁₈

C₁₀H₂₀ → C₂H₄ + C₈H₁₆

C₁₀H₂₂ → C₂H₄ + C₈H₁₈

C₁₀H₂₂ → C₂H₄ + C₈H₁₆

Question 19 of 29

20. What is the name of this molecule?

methane

methyl

ethane

methanol

Question 20 of 29

21. State the general formula for alkenes

CₙH₂ₙ

CₙH₂ₙ₊₂

CₙHₙ

CₙHₙ₊₁

Question 21 of 29

22. What is a substitution reaction?

A reaction where an atoms of a group of atoms is removed from a molecule

A reaction where an atom or group of atoms is replaced by a different atom or group of atoms

A reaction where an atom or group of atoms is added to a molecule

A reaction where a double bond breaks to form a long chain of molecules

Question 22 of 29

23. In the fractional distillation of crude oil, how does viscosity change as the chains get longer?

Decreases

Increases

Viscosity is independent of chain length

Remains constant

Question 23 of 29

24.

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. There is another isomer called 1,2-dimethylethane.

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

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

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

Question 24 of 29

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

Starch

Silver nitrate

Bromine water

Benedict\'s reagent

Question 25 of 29

26. What is the molecular formula for butene?

C₄H₁₀

C₆H₁₂

C₄H₈

C₆H₁₄

Question 26 of 29

27. Write a chemical equation for the complete combustion of propane

C₃H₈ + 5O₂ → 3CO₂ + 8H₂O

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

C₃H₈ + 10O₂ → 3CO₂ + 4H₂O

C₃H₈ + 10O₂ → 3CO₂ + 8H₂O

Question 27 of 29

28. Explain the term saturated

A molecule that will not react with anything

A molecule that is poisonous

A molecule containing only single bonds

A molecule that is usually a solid at room temperature

Question 28 of 29

29. Write the word equation for the reaction between methane and bromine

methane + bromine → dibromomethane + hydrogen bromide

methane + bromine → bromomethane + hydrogen

methane + bromine → bromomethane + hydrogen bromide

methane + bromine → dibromomethane + hydrogen

Question 29 of 29

Alkenes & Polymers quiz

Related Posts:

Share This Story, Choose Your Platform!