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Introduction of Hydrocarbon

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

In which of the following are crude oil fractions arranged in order of increasing viscosity?

a)

Gasoline < kerosene < diesel oil

b)

Kerosene < gasoline < diesel oil

c)

Diesel oil < gasoline < kerosene

d)

Kerosene < diesel oil < gasoline

e)

Gasoline < diesel oil < kerosene

2.

Which of the following is the molecular formula of a hydrocarbon likely to be found in LPG?

a)

CH614

b)

C12H26

c)

C70H 142

d)

C24H50

e)

C4H10

3.

Which of the following is the molecular formula of a hydrocarbon likely to be found in gasoline?

a)

C24H50

b)

C60 H 122

c)

C16 H 34

d)

C8H18

e)

C3H8

4.

Which of the following statements is false?

a)

Lubricating oils ignite more easily than diesel oil.

b)

LPG contains shorter hydrocarbon molecules than diesel oil.

c)

Kerosene is distilled at a lower temperature than diesel oil.

d)

Heavy fuel oils have higher viscosities than diesel oil.

e)

Gasoline has a lower boiling point than diesel oil.

5.

Crude oil fractions collected at lower temperatures during fractional distillation exhibit higher values for which of the following physical properties?

a)

Molecular size

b)

Volatility

c)

Viscosity

d)

Melting point

e)

Ignition temperature

6.

Selected melting and boiling points of compounds extracted from three crude oil fractions are shown in the table.

In which fraction of crude oil would compound X

be found?

a)

Diesel oil

b)

LPG

c)

Gasoline

d)

Bitumen

e)

Heavy fuel oil

7.

In which fraction of crude oil would compound Y

be found?

a)

Diesel oil

b)

Gasoline

c)

Bitumen

d)

Heavy fuel oil

e)

LPG

8.

In which fraction of crude oil would compound Z

be found?

a)

LPG

b)

Bitumen

c)

Heavy fuel oil

d)

Gasoline

e)

Diesel oil

9.

Why are crude oil fractions described as non-renewable resources?

a)

Crude oil use is not sustainable because it is no longer naturally produced.

b)

Crude oil use is not sustainable because its production is very slow.

c)

Products made from crude oil fractions are non-recyclable.

d)

Crude oil fractions cannot be reused after combustion.

e)

Products made from crude oil fractions are non-biodegradable.

10.

Which of the following statements is true?

a)

All fractions of crude oil are used as fuels.

b)

Most fractions of crude oil are liquids at room temperature.

c)

Fractional distillation involves a chemical reaction.

d)

Fractional distillation involves the separation of crude oil into pure compounds.

e)

Fractional distillation involves the separation of compounds using a pressure gradient.

11.

Which variable physical property of crude oil fractions enables their separation by fractional distillation?

a)

Solubility

b)

Melting point

c)

Boiling point

d)

Flammability

e)

Viscosity

12.

At which of the following temperatures is crude oil heated at the base of a typical fractionating column?

a)

200∘C

b)

400∘C

c)

100∘C

d)

50∘C

e)

600∘C

13.

Which of the following is not an accurate description of crude oil?

a)

Synthetic

b)

Finite resource

c)

Nonsustainable

d)

Fossil fuel

e)

Energy rich

14.

Which crude oil fraction is most useful as a fuel for large ships?

a)

Gasoline

b)

Diesel oil

c)

Kerosene

d)

Heavy fuel oil

e)

LPG

15.

Groups of crude oil fractions a–e are separated by heating crude oil to different temperatures. Labeled in the diagram are the regions of the fractionating column in which these groups of fractions are collected.

Which group of fractions is the most useful source of liquid compounds for petrochemical manufacturing?

a)

B

b)

A

c)

E

d)

D

e)

C

16.

From which group of fractions are waxes, grease and oils for lubrication most likely to be extracted?

a)

a

b)

b

c)

c

d)

e

e)

d

17.

Which two groups of fractions are the least useful as vehicle fuels?

a)

a and e

b)

a and b

c)

c and b

d)

e and d

18.

Which two groups of fractions are the most useful as automobile fuels?

a)

d and e

b)

a and d

c)

c and d

d)

a and b

e)

b and c

19.

Which of the following is the molecular formula of a hydrocarbon likely to be found in heavy fuel oil?

a)

C17H36

b)

C7H16

c)

CH4

d)

C70 H142

e)

C4H10

20.

Crude oil fractions A–F can be separated by fractional distillation and are collected at different heights in the fractionating column, as shown in the diagram.

Which of the labeled fractions is used for the surfacing of roads?

a)

B

b)

D

c)

C

d)

A

e)

E

21.

Identify fraction A

a)

Bitumen

b)

Lubricating oil

c)

Gasoline

d)

Diesel oil

e)

LPG

22.

Identify fraction C.

a)

Gasoline

b)

LPG

c)

Diesel oil

d)

Lubricating oil

23.

Identify fraction D.

a)

Lubricating oil

b)

Diesel oil

c)

Gasoline

d)

LPG

e)

kerosene

24.

Which crude oil fraction is most useful as a cooking fuel?

a)

Diesel oil

b)

Kerosene

c)

LPG

d)

Gasoline

e)

Heavy fuel oil

25.

Which of the following physical properties of crude-oil fractions decreases as you go down a fractionating column?

a)

Viscosity

b)

Melting point

c)

Molecular weight

d)

Volatility

e)

Intermolecular forces

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