Chemistry 5070/42 — October/November 2022
Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme
7
questions
60
marks
60
minutes
Topics Experimental Contexts · Observations and Measurements · Qualitative Analysis · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations
Q14MExperimental ContextsFree sample
Three colourless gases A, B and C have the properties shown.
| gas | density | solubility in water |
|---|---|---|
| A | more dense than air | soluble |
| B | more dense than air | insoluble |
| C | less dense than air | soluble |
Some sets of apparatus, P, Q and R, used to collect gases are shown.
(a)1M
State which set of apparatus P, Q or R is most suitable to collect gas A.
______
(b)
R is used to collect gas B.
(i)1M
State why Q is not used to collect gas B.
______
(ii)1M
State why R is more suitable than P to collect gas B.
______
(c)1M
State why R is not used to collect gas C.
______
The rest of this paper
6 more questions- Q2Use of Techniques, Apparatus and Materials · Experimental Contexts · Observations and Measurements · Qualitative Analysis7M
- Q3Use of Techniques, Apparatus and Materials · Qualitative Analysis · Experimental Contexts · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation11M
- Q4Experimental Contexts · Planning Experiments and Investigations · Observations and Measurements · Analysis, Conclusions and Evaluation6M
- Q5Use of Techniques, Apparatus and Materials · Experimental Contexts · Qualitative Analysis · Observations and Measurements · Analysis, Conclusions and Evaluation17M
- Q6Qualitative Analysis · Experimental Contexts9M
- Q7Analysis, Conclusions and Evaluation · Observations and Measurements · Experimental Contexts6M
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