Exam (elaborations)
OCR GCSE JUNE 2022 CHEMISTRY B J258 QUESTION PAPER 2
- Module
- Maths Science
- Institution
- GCSE
OCR GCSE JUNE 2022 CHEMISTRY B J258 QUESTION PAPER 2
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, Oxford Cambridge and RSA
F
Monday 20 June 2022 – Morning
GCSE (9–1) Chemistry B (Twenty First Century Science)
J258/02 Depth in Chemistry (Foundation Tier)
Time allowed: 1 hour 45 minutes
You must have:
* 8 9 9 7 7 4 5 1 9 5 *
• a ruler (cm/mm)
• the Data Sheet for GCSE (9-1) Chemistry B
(inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 8 0 2 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 90.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2022 [601/8605/7] OCR is an exempt Charity
DC (ST/SW) 308429/4 Turn over
, 2
Answer all the questions.
1 Fig. 1.1 shows a model for the arrangement of ions in an ionic compound when it is a solid and
when it is a liquid.
+ – + – + –
+ – + +
ions –
– + – + – + melting – + – –
+
+ – + – + – + – + +
–
– + – + – + – + – –
+
Solid Liquid
Fig. 1.1
(a) Which of the following statements are true only for the solid, which are true only for the liquid
and which are true for both?
Tick (3) one box in each row.
True only True only
True for
for the for the
both
solid liquid
The ions are close together.
The ions are attracted by opposite charges.
The ions are in a regular arrangement.
The ions can move over each other.
[2]
© OCR 2022
, 3
(b) Sodium chloride and magnesium chloride are ionic compounds.
The melting points of sodium chloride and magnesium chloride are shown in the table.
Melting point
(°C)
Sodium chloride 801
Magnesium chloride 714
(i) What is the state of sodium chloride and of magnesium chloride at 750 °C?
Put a ring around one word to complete each sentence.
At 750 °C, sodium chloride is a solid / liquid / gas.
At 750 °C, magnesium chloride is a solid / liquid / gas.
[1]
(ii) A limitation of the model shown in Fig. 1.1 is that it does not show the reasons why
different compounds have different melting points.
Which two statements describe the reasons why compounds have different melting
points?
Tick (3) two boxes.
Ions in different compounds have different chemical symbols.
Ions in different compounds have different charges.
Ions in different compounds have different colours.
The force of attraction between ions is different in different compounds.
[2]
© OCR 2022 Turn over
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