Practise atmosphere questions by recalling gas percentages, calculating oxygen volume and explaining combustion or carbon dioxide evidence.
This question is about gases.
The table gives information about five gases.
Use information from the table to answer these questions.
Each gas may be used once, more than once or not at all.
Give the name of the gas that is about 79% of the atmosphere by volume.
Give the name of the gas that is not normally found in the atmosphere.
Give the name of the gas that affects global warming.
A student uses the reaction between iron and oxygen to find the percentage of oxygen in air.
The diagram shows the apparatus the student uses.
State why the iron powder needs to be wet.
State the colour of the compound formed in the reaction between iron and oxygen.
Explain the advantage of using iron powder rather than pieces of iron.
The syringe in the diagram shows the reading at the end of the experiment.
Complete table 1 to show the readings on the syringe.
Give both values to the nearest 1 cm3.
table 1
The student repeats the experiment and obtains a different set of results.
Table 2 shows these results.
Use the results from table 2 to calculate the percentage by volume of oxygen in the air.
percentage by volume of oxygen in air = ................................ %
Table 2
This is a question about metals and their compounds.
Magnesium is a metal that burns in air.
State one observation made during the combustion of magnesium metal.
A student uses this apparatus to investigate the effect of heat on different solid metal carbonates.
This is the student's method.
- use a spatula to put some metal carbonate in the boiling tube
- fit the delivery tube into position
- pour some limewater into the test tube
- start a timer and immediately begin to heat the metal carbonate
- record the time when a change first occurs in the limewater
The student repeats the method using different metal carbonates.
When a metal carbonate is heated a reaction sometimes occurs.
The equation for the reaction is
State the name given to this type of reaction.
The table shows some of the results for the student's investigation.
State the colour change that occurs for copper(II) carbonate.
from……to……
There is a relationship between the position of a metal in the reactivity series and how easily the metal carbonate reacts when heated.
Use the student's results and your own knowledge to deduce this relationship.
This question is about gases.
The table gives information about five gases.
Use information from the table to answer these questions.
Each gas may be used once, more than once or not at all.
Give the name of the gas that affects global warming.
When iron is left in damp air, rust forms on its surface.
A student uses this apparatus to find the approximate percentage by volume of oxygen in air.
This is the student's method.
- place a graduated glass tube in a beaker of water
- place some damp iron wool and a rubber bung in the top of the tube
- record the reading of the water level in the tube
- leave the apparatus for a few days
- record the reading of the water level again
The diagram shows the readings at the start and at the end of the experiment.
Use the readings to complete the table, giving all values to the nearest 0.5 cm3.
The student uses these results to calculate the percentage by volume of oxygen in air.
Suggest why her calculated value is lower than the expected value.
The student repeats the experiment using the same apparatus.
These are her results for the second experiment.
volume of air in tube at start = 80.0 cm3
reading at start = 20.0
reading at end = 35.5
Use the results to calculate the percentage by volume of oxygen in air.
percentage = ................................ %