Air and water IGCSE chemistry quiz

Water for human used is treated by filtration then chlorination, which use do need water of this quality?

• water for cooling in industry

• water for drinking

• water for flushing toilets

• water for irrigation

Carbon monoxide an air pollutant produced when petrol is burnt in a car engine, why is it considered as air pollutants?

• It causes global warming

• It causes corrosion of buildings

• it is poisonous

• It is a greenhouse gas

Which process does not increase global warming?

• burning fossil fuels

• farming cattle for beef

• decay of organic waste

• growing crops such as sugar cane

Water has been contaminated with seawater. Which substance can be removed by chlorination and filtration?

• bacterial and sand only

• sand and sodium chloride only

• baterial and sodium chloride only

• bacteria, sand and sodium chloride

Which air pollutant is not made when coal are burnt in a power station?

• carbon monoxide

• lead compounds

• nitrogen oxides

• sulfur dioxide

Four steel clips are treated with as described before being placed in water. Which paper clip rust most quickly?

• coated with grease

• dipped in paint and allowed to dry

• electroplated with zinc.

• wash with soap and rinse

which problem is not caused by acid rain?

• breathing difficulties

• dying trees

• erosion of status

• lowered pH of lakes

which gas is presented as the highest percentage in the Earth's atmosphere?

• oxygen

• nitrogen

• carbon dioxide

• hydrogen

Many car exhaust systems contains a catalytic converter.

Which change does not occur in a catalytic converter?

• carbon dioxide to carbon

• carbon monoxide to carbon dioxide

• nitrogen oxide to nitrogen

• unburnt hydrocarbons to carbon dioxide and water

photosynthesis and respiration are important natural processes.

Which statement is correct?

• carbon dioxide is formed by the reaction of glucose with water during photosynthesis.

• carbon dioxide is removed from the air by respiration.

• glucose reacts with water to form oxygen during respiration.

• photosynthesis produces glucose and oxygen