Chemistry 5070/41 — October/November 2015

Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme

questions

marks

minutes

Topics Experimental Contexts · Analysis, Conclusions and Evaluation · Qualitative Analysis · Use of Techniques, Apparatus and Materials · Observations and Measurements

Q19MExperimental ContextsQualitative AnalysisFree sample

Propene is an alkene. It can be made from an alcohol containing three carbon atoms, $\text{C}_3\text{H}_7\text{OH}$ , using the apparatus shown.

Fig. 1

The equation for the reaction is

\text{C}_3\text{H}_7\text{OH} \rightarrow \text{C}_3\text{H}_6 + \text{H}_2\text{O}

(a)

(i)

Name the alcohol containing three carbon atoms that is used to make propene.

______

(ii)

Suggest why aluminium oxide is used in this reaction.

______

(iii)

Draw the structure of propene showing all atoms and bonds.

(b)

Describe the test that is used to show that propene is unsaturated.

test ______
observation ______

(c)

When propene undergoes complete combustion in air, the products are water and a colourless gas.

(i)

Name the colourless gas. Give a test and observation to identify this gas.

name of gas ______
test and observation ______

(ii)

Construct an equation for the complete combustion of propene.

______

The rest of this paper

7 more questions

Q2Experimental Contexts7M
Q3Experimental Contexts1M
Q4Analysis, Conclusions and Evaluation1M
Q5Experimental Contexts1M
Q6Experimental Contexts · Use of Techniques, Apparatus and Materials · Analysis, Conclusions and Evaluation · Observations and Measurements14M
Q7Qualitative Analysis · Analysis, Conclusions and Evaluation9M
Q8Experimental Contexts · Analysis, Conclusions and Evaluation18M

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