The percentage of oxygen in the atmosphere is
1. 21%
2. 78%
3. 1%
4. 0.03%
The percentage of nitrogen in the atmosphere is
1. 21%
2. 78%
3. 1%
4. 0.04%
The percentage of noble gases in the air is
1. 21%
2. 78%
3. 1%
4. 0.04%
The percentage of carbon dioxide in the atmosphere is
1. 21%
2. 78%
3. 1%
4. 0.04%
The test for the presence of water vapour in the air involves using
1. bubbling the air through limewater
2. the pop test
3. cobalt chloride paper
4. heating copper in air
The test for the presence of carbon dioxide in air involves using
1. cobalt chloride paper
2. limewater
3. the pop test
4. heating copper in air
An experiment to show the amount of oxygen air might involve
1. limewater
2. cobalt chloride paper
3. the pop test
4. heating copper in air
Air is a mixture of
1. elements and compounds
2. compounds only
3. elements only
4. none of the above
Which of the following is false?
1. Catalysts can speed up a chemical reaction
2. Catalysts can slow down a chemical reaction
3. A chemical reaction stops if the catalyst involved gets used up
4. A catalyst remains unchanged at the end of a chemical reaction
When magnesium is burned in air then the following happens
1. Magnesium dioxide is formed
2. Magnesium oxide forms
3. Magnesium hydroxide is formed
4. Magnesium peroxide is formed
The test for oxygen involves
1. relighting a glowing splint
2. the pop test
3. limewater
4. cobalt chloride
Which of the following if false?
1. Oxygen is soluble in water
2. Oxygen turns moist blue litmus paper red
3. Oxygen is a very reactive element
4. Oxygen is heavier than air
When magnesium is burned in air, the product of the reaction
1. turns moist blue litmus red
2. turns moist red litmus blue
3. has no effect on moist litmus
When air is bubbled through limewater the following is formed
1. Calcium dioxide
2. Calcium hydroxide
3. Calcium oxide
4. Calcium carbonate
The catalyst used in the preparation of oxygen is
1. Hydrogen peroxide
2. Manganese dioxide
3. Magnesium oxide
4. Marble chips
The preparation of carbon dioxide involves the use of
1. Hydrogen peroxide
2. Manganese dioxide
3. Magnesium oxide
4. Marble chips
Carbon dioxide
1. dissolves in water to form limewater
2. dissolves in water to form carbonic acid
3. dissolves in water to form chalk
4. is insoluble in water
Limewater is a solution of
1. Chalk
2. Calcium carbonate
3. Calcium suphate
4. Calcium hydroxide
Plants use oxygen for
1. Photosynthesis
2. Respiration
3. Transpiration

Quiz