Page 1 of 16
*6941276161*
CHEMISTRY 0620/63
Paper 6 Alternative to Practical May/June 2023
1 hour
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
● Answer all questions.
● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
● Write your name, centre number and candidate number in the boxes at the top of the page.
● Write your answer to each question in the space provided.
● Do not use an erasable pen or correction fluid.
● Do not write on any bar codes.
● You may use a calculator.
● You should show all your working and use appropriate units.
INFORMATION
● The total mark for this paper is 40.
● The number of marks for each question or part question is shown in brackets [ ].
● Notes for use in qualitative analysis are provided in the question paper.
IB23 06_0620_63/3RP
© UCLES 2023 [Turn over
This document has 16 pages. Any blank pages are indicated.
Cambridge IGCSETM
Page 2 of 16
2
© UCLES 2023 0620/63/M/J/23
1 This question is about separating mixtures.
(a) The apparatus in Fig. 1.1 can be used to separate a mixture of liquids with different boiling
points.
A
B
Fig. 1.1
(i) Name the separation technique that uses the apparatus shown in Fig. 1.1.
....................................................................................................................................... [1]
(ii) Name the items of apparatus labelled A and B.
A .........................................................................................................................................
B .........................................................................................................................................
[2]
(iii) Draw an arrow on Fig. 1.1 to show where the apparatus should be heated. [1]
Page 3 of 16
3
© UCLES 2023 0620/63/M/J/23 [Turn over
(b) Fig. 1.2 shows the apparatus that can be used to separate insoluble calcium carbonate from
aqueous sodium chloride.
Fig. 1.2
(i) State the term used for the solid removed from a liquid using the apparatus shown in
Fig. 1.2.
....................................................................................................................................... [1]
(ii) The calcium carbonate obtained using the apparatus in Fig. 1.2 is contaminated with
aqueous sodium chloride.
Describe how the aqueous sodium chloride can be removed.
.............................................................................................................................................
....................................................................................................................................... [1]
(iii) Name the method of separation that can be used to obtain solid sodium chloride from an
aqueous solution of sodium chloride.
....................................................................................................................................... [1]
[Total: 7]