Instructions
• Use black ink or ball-point pen.
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
...
Instructions
• Use black ink or ball-point pen.
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
• Calculators may be used.
• Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
• The total mark for this paper is 60.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• In questions marked with an asterisk (*), marks will be awarded for your ability to
structure your answer logically, showing how the points that you make are related
or follow on from each other where appropriate.
• There is a periodic table on the back cover of the paper.
Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
• Check your answers if you have time at the end.
You must have:
Calculator, ruler
Combined Science
PAPER 5
Foundation Tier
Time 1 hour 10 minutes 1SC0/2CF
Pearson Edexcel Level 1/Level 2 GCSE (9–1)
*P69475A0220* 2
BLANK PAGE
*P69475A0320* Turn over
3
Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .
1 This question is about elements in group 1 of the periodic table.
(a) Figure 1 shows the symbols of the first three elements in group 1 of the
periodic table and their melting points.
symbol melting point in °C
Li 181
Na 98
K 64
Figure 1
Use the periodic table to answer these questions.
(i) Give the symbol of another element in group 1.
(1)
..............................................................
(ii) Give the atomic number of lithium.
(1)
..............................................................
(iii) Describe the trend in the melting points of the elements in Figure 1.
(2)
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
*P69475A0420* 4
(b) The elements in group 1 react very vigorously with water.
A student suggests this method to see what happens when sodium reacts
with water.
step 1 put on safety glasses and a laboratory coat
step 2 cut a 2cm×2cm×2cm cube of sodium
step 3 put a few drops of water in the container shown in Figure 2
step 4 add the sodium to the water in the container and observe
the reaction
(i) Figure 2 shows a diagram of the container the student suggested for step 3.
Figure 2
Give the name of the container shown in Figure 2.
(1)
............................................................................................................................................
*P69475A0520* Turn over
5
(ii) A teacher says that the method is not safe because the reaction is
too vigorous.
Explain changes that could be made to step 2 and to step 3 that would make
the method safer.
(3)
step 2: change and explanation
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
step 3: change and explanation
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................
(Total for Question 1 = 8 marks)
*P69475A0620* 6
2 Some reactions are exothermic and some reactions are endothermic.
(a) What does an exothermic reaction always give out?
(1)
A heat energy
B light
C a gas
D sound
(b) In an experiment, a solid is mixed with a liquid.
The temperature change of the mixture is measured.
Figure 3 shows the apparatus that is used.
A
C
B
D
Figure 3
(i) Give the letter of the piece of apparatus, A, B, C or D, in Figure 3 that is used
to measure the temperature.
(1)
..............................................................
(ii) Give the name of the piece of apparatus B shown in Figure 3.
(1)
.............................................................................................
(iii) The piece of apparatus labelled C is made from polystyrene.
State why polystyrene is a better material t
[Show More]
