Chemistry 5070/42 — October/November 2019
Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme
Topics Experimental Contexts · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation · Observations and Measurements · Qualitative Analysis
Three gases, A, B and C, have the properties shown.
| gas | density | solubility in water | appearance |
|---|---|---|---|
| A | less dense than air | insoluble | colourless |
| B | more dense than air | insoluble | colourless |
| C | more dense than air | soluble | green |
Some sets of apparatus, X, Y and Z, used to collect gases are shown.
Apparatus D is used to collect the gases.
Name apparatus D.
______
Which two sets of apparatus, from X, Y and Z, can be used to collect gas A?
______ and ______
Which set of apparatus, X, Y or Z, can be used to collect gas C?
______
State why apparatus Y is less suitable than apparatus X to collect gas B.
______
State why apparatus X is less suitable than apparatus Z to collect gas B.
______
The rest of this paper
5 more questions- Q2Use of Techniques, Apparatus and Materials · Observations and Measurements · Experimental Contexts · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation9M
- Q3Planning Experiments and Investigations · Experimental Contexts7M
- Q4Qualitative Analysis · Experimental Contexts10M
- Q5Experimental Contexts · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations · Observations and Measurements · Analysis, Conclusions and Evaluation16M
- Q6Experimental Contexts · Qualitative Analysis · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation13M