IGCSE Chemistry Paper-1: Specimen Questions with Answers 9 - 10 of 99

Question number: 9

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Question

In an oil refinery, petroleum is separated into useful fraction as shown below.

What are fractions X, Y and Z?

An oil refinery, petroleum figure is given

An Oil Refinery, Petroleum Figure is Given

Choices

Choice (4)

a.

X is paraffin (kerosene), Y is Bitumen and Z is fuel oil

b.

X is fuel oil, Y is Bitumen and Z is paraffin (kerosene)

c.

X is paraffin (kerosene), Y is fuel oil and Z is bitumen

d.

X is fuel oil, Y is paraffin (kerosene) and Z is bitumen

Answer

c.

Explanation

Petrol Refinement Process

Petrol Refinement Process

From the above figure the sequence we get is clear.

Refinery gases - > gasoline - > kerosene - > Diesel oil - > Fuel oil - > Bitumen

Question number: 10

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Question

The table explains atmospheric composition of four newly discovered planets.

Various planets with composition

planet

composition of atmosphere

W

argon, carbon dioxide and oxygen

X

argon, nitrogen and oxygen

Y

argon, carbon dioxide and methane

Z

methane, nitrogen and oxygen

On which planets is the greenhouse effect likely to occur?

Choices

Choice (4)

a.

W only

b.

W, Y and Z

c.

W and Y only

d.

W, X and Z

Answer

b.

Explanation

The most abundant greenhouse gases are:

  • Water vapour
  • Carbon di oxide
  • Methane
  • Nitrous oxide
  • Ozone
  • Chlorofluorocarbons

In the above table only X planet does not contain any of the greenhouse gas.

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