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OCR A Level Chemistry B 2023 Paper 1 question paper
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OCR A Level Chemistry B 2023 Paper 1 question paper
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Oxford Cambridge and RSAMonday 12 June 2023 – Morning
A Level Chemistry B (Salters)
H433/01 Fundamentals of Chemistry
Time allowed: 2 hours 15 minutes
You must have:
* 9 9 0 0 7 0 4 8 9 3 *
• the Data Sheet for Chemistry B
You can use:
• a scientific or graphical calculator
• an HB pencil
* H 4 3 3 0 1 *
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 110.
• 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 36 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2023 [601/5371/4] OCR is an exempt Charity
DC (ST/SG) 317976/4 Turn over
By: Tyrion Papers
, 2
Section A
You should spend a maximumof 40 minuteson this section.
Write your answer to each question in the box provided.
1 Which row is correct for the properties of substances with the bonding types shown?
Melting Electrical conductivity
Bonding type
point Solid Molten
low
A covalent network poor poor
high
B ionic good good
high
C metallic poor good
low
D simple molecular poor poor
Your answer [1]
2 Helium-4 is formed by a nuclear fusion reaction.
4
2 2H
3 e 2He + ....................
What is needed to complete the equation?
A 1 electron
B 1 neutron
C 1 proton
D 2 protons
Your answer [1]
© OCR 2023
By: Tyrion Papers
, 3
3 Which molecule is the most polar?
A CCl 4
B CF 4
C CHF 3
D CHCl 2F
Your answer [1]
4 One of the principles of green chemistry in industrial processes involves the use of a selective
catalyst.
Which of the following makes a selective catalyst ‘green’?
A It speeds up the process.
B It improves the atom economy.
C It minimises the use of organic solvents.
D It reduces energy usage and minimises waste product.
Your answer [1]
5 Sodium phosphate(V) has the formula Na 3PO4.
What is the formula of calcium phosphate(V)?
A CaPO
4
2(PO4)3
3PO4
3(PO4)2
B Ca
C Ca
D Ca
Your answer [1]
© OCR 2023 Turn over
By: Tyrion Papers
, 4
6 A colorimeter is used to measure the concentration of a blue solution of copper( II ) sulfate(VI ).
Which of the following is correct?
A A blue filter is used.
B A calibration curve is plotted with known concentrations of Cu2+.
C The amount of light transmitted is proportional to the Cu2+ concentration.
D The measured absorbance decreases with increasing Cu2+ concentration.
Your answer [1]
7 A student studies a reaction that ‘goes to completion’.
The student estimates the numerical value of K c for the reaction.
What is a valid estimate for K c for this reaction?
A 0
B 1 × 10–10
C 1
D 1 × 1010
Your answer [1]
8 Which of the following is correct for gas-liquid chromatography?
A A reactive carrier gas is used.
B The column consists of a volatile liquid on a porous support.
C The emerging compounds can be detected by mass spectrometry.
D The largest molecules usually have the shortest retention times.
Your answer [1]
© OCR 2023
By: Tyrion Papers
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