Chemistry 5070/42 — May/June 2023
Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme
4
questions
40
marks
60
minutes
Topics Use of Techniques, Apparatus and Materials · Experimental Contexts · Analysis, Conclusions and Evaluation · Observations and Measurements · Qualitative Analysis · Planning Experiments and Investigations
Q16MUse of Techniques, Apparatus and MaterialsExperimental ContextsAnalysis, Conclusions and EvaluationFree sample
A student investigates the rusting of iron.
Fig. 1.1 shows the apparatus the student uses.
(a)1M
Name apparatus X.
______
(b)1M
State why a stopper is used in Experiment B.
______
(c)1M
State why the water in Experiment C is boiled before use.
______
(d)1M
State why a layer of oil is used in Experiment C.
______
(e)2M
The experiments are left for one week.
Predict in which of the experiments the nail will have rusted.
______
Explain your prediction.
______
The rest of this paper
3 more questions- Q2Observations and Measurements · Experimental Contexts · Use of Techniques, Apparatus and Materials · Analysis, Conclusions and Evaluation14M
- Q3Qualitative Analysis · Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation14M
- Q4Planning Experiments and Investigations · Use of Techniques, Apparatus and Materials · Observations and Measurements6M
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