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ocr AS Level Chemistry B (Salters) (H033-01) Question Paper May2024.
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ocrTuesday 14 May 2024 – Morning
AS Level Chemistry B (Salters)
H033/01 Foundations of chemistry
Time allowed: 1 hour 30 minutes
You must have:
the Data Sheet for Chemistry B
You can use:
a scientific or graphical calculator
an HB pencil
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
INSTRUCTIONS
Last name
• 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 70.
• The marks for each question are shown in brackets [ ].
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
Turn over
, 2
SECTION A
You should spend a maximum of 25 minutes on this section.
Write your answer to each question in the box provided.
1 On a Periodic Table the number 39.1 is shown for potassium,
K. What is this number?
A atomic number
B mass number
C relative atomic mass
D relative molecular mass
Your answer [1]
2 SiO2 has a covalent network structure.
What is correct for SiO2?
A It consists of SiO2 molecules joined by strong intermolecular bonds.
B It does not conduct electricity when molten.
C It has a low melting point.
D It is readily soluble in water.
Your answer [1]
3 What is the missing product of the nuclear fusion reaction shown?
2
H + 3H 1n + ........................
1 1 0
A a beryllium nucleus
B a helium nucleus
C a lithium nucleus
D a proton
Your answer [1]
verified
, 3
4 Magnesium oxide reacts with dilute hydrochloric acid.
What is correct for this reaction?
A A gas is given off.
B A green solution of a salt is formed.
C It is a neutralisation.
D Magnesium hydrochloride is formed.
Your answer [1]
5 This question is about the relationship between enthalpy changes and bonds broken and made.
Which row is correct?
sign of ΔH description bonds broken and made
more energy released in
A – endothermic making bonds than used
in breaking bonds
less energy released in
B – exothermic making bonds than used
in breaking bonds
less energy released in
C + endothermic making bonds than used
in breaking bonds
more energy released in
D + exothermic making bonds than used
in breaking bonds
Your answer [1]
6 What are possible products from cracking an alkane molecule?
A one alkane molecule and two alkene molecules
B two alkane molecules
C two alkane molecules and one alkene molecule
D two alkene molecules
Your answer [1]
verified Turn over
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