Which box shows the test for oxygen gas

1
CHEMISTRY DEPARTMENT WAID ACADEMY
Standard Grade Topic 5
2
Which of the following is the test for oxygen ?

• Oxygen turns lime water milky.
• Oxygen relights a glowing splint..
• Oxygen burns with a 'pop.
• Oxygen extinguishes a flame.

3
Which of the following shows the approximate
composition of the air?

• Nitrogen 10 Oxygen 90
• Nitrogen 20 Oxygen 80
• Nitrogen 90 Oxygen10
• Nitrogen 80 Oxygen 20

4
What is meant when fossil fuels are described as
being finite?

• Fossil fuels are difficult to find.
• Fossil fuels take a long time to form.
• Fossil fuels cannot be replaced.
• Fossil fuels are expensive.

5
The compounds found in crude oil and natural gas
are mainly

• hydrocarbon compounds.
• carbohydrate compounds.
• pure carbon.
• sulphur containing compounds.

6
A hydrocarbon compound contains

• hydrogen, carbon and oxygen only.
• hydrogen and carbon only.
• hydrogen, carbon and sulphur only.
• hydrogen, carbon, oxygen and sulphur only.

7
When a hydrocarbon burns in a plentiful supply of
air it forms

• Carbon dioxide only.
• Carbon dioxide and carbon monoxide.
• Carbon monoxide and water.
• Carbon dioxide and water.

8
The process used to separate crude oil into
useful components in an oil refinery is called.

• Filtration.
• Fractional distillation.
• Evaporation.
• Purification.

9
Which of the oil fractions shown is the most
viscous?

• Refinery gas.
• Kerosene.
• Petrol.
• Residue.

10
Which of the oil fractions shown is used as
diseel fuel?

• Gas Oil.
• Naphtha.
• Petrol.
• Kerosene.

11
Identify the poisonous gas produced during the
incomplete combustion of hydrocarbons.

• SO2.
• NO2
• CO
• CO2