Environment and atmoshere

Which gas is mainly responsible for the green house effect?

• H2

• O2

• CO2

• Water Vapours

Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

Seawater is desalinated to make it drinkable.

What is the main substance removed by desalination?

• A detergent

• B fertilizer

• C sewage

• D sodium chloride

Dissolved substances in water can cause eutrophication.

How many of the ions shown cause this effect?

Chloride ion ,Phosphate ion, Nitrate ion ,Carbonate ion

• A 1

• B 2

• C 3

• D 4

Which two gases do not damage limestone buildings?

• A nitrogen and carbon monoxide

• B nitrogen dioxide and carbon monoxide

• C nitrogen dioxide and carbon dioxide

• D sulfur dioxide and carbon dioxide

Which atmospheric pollutant is produced by bacterial decay of vegetable matter?

• A carbon monoxide

• B methane

• C ozone

• D sulfur dioxide

Which pair of gases could be removed from the atmosphere using calcium carbonate?

• A CO₂ and O₃

• B CO and SO₂

• C CH₄ and NO₂

• D NO₂ and SO₂

Which gas burns in air to form only one product?

• A ammonia

• B carbon monoxide

• C hydrogen chloride

• D methane

A catalytic converter in a car exhaust system speeds up the change of pollutants into less harmful products.

Which change does not occur in a catalytic converter?

• A carbon dioxide → carbon

• B carbon monoxide → carbon dioxide

• C nitrogen oxides → nitrogen

• D unburned hydrocarbons → carbon dioxide and water

1 Which statements about the pollutant carbon monoxide are correct?

1 It is a colourless, odourless gas.

2 It is formed by incomplete combustion of natural gas.

3 It reacts with haemoglobin in the blood.

A 1 and 2 only

B 1 and 3 only

C 2 and 3 only

D 1, 2

• A 1 and 2 only

• B 1 and 3 only

• C 2 and 3 only

• D 1, 2 and 3