Exam (elaborations)
OCR MERGED QUESTION PAPER AND MARK SCHEME AS Level Chemistry AH032/01Breadth in chemistry FOR MAY 2024
OCR MERGED QUESTION PAPER AND MARK SCHEME AS Level Chemistry AH032/01Breadth in chemistry FOR MAY 2024
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Tuesday 14 May 2024 – MorningAS Level Chemistry A
H032/01 Breadth in chemistry
Time allowed: 1 hour 30 minutes
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 Which diagram shows a p‑orbital?
A
B
C
D
Your answer [1]
2 Which row shows the atomic structure of 25Mg2+?
Protons Neutrons Electrons
A 10 12 13
B 10 15 12
C 12 13 10
D 12 13 14
Your answer [1]
© OCR 2024
, 3
3 A nitrogen oxide contains 36.84% of nitrogen by mass.
What is the empirical formula of the nitrogen oxide?
A NO
B NO2
C N2O
D N2O3
Your answer [1]
4 Carbon monoxide reacts with oxygen to form carbon dioxide:
2CO(g) + O2(g) 2CO2(g)
Which volumes of CO(g) and O2(g) produce the largest volume of CO2(g)?
All gas volumes are measured at RTP.
A 1.00 dm3 CO and 4.00 dm3 O2
B 2.00 dm3 CO and 3.00 dm3 O2
C 3.00 dm3 CO and 2.00 dm3 O2
D 4.00 dm3 CO and 1.00 dm3 O2
Your answer [1]
5 Which reaction produces a product with linear molecules?
A 2B + 3F2
B C + O2
C 2H2 + O2
D N2 + 3H2
Your answer [1]
© OCR 2024 Turn over
, 4
6 Which statement about the periodic table is not correct?
A Elements in the same group have similar chemical properties.
B The elements are ordered by increasing atomic mass.
C The elements are ordered by increasing atomic number.
D There is a repeating trend of physical and chemical properties across the periods.
Your answer [1]
7 Group 2 compounds can be used in agriculture to neutralise acid soils and in medicine to treat
indigestion.
Which Group 2 compound is not suitable for either use?
A Mg(OH)2
B MgSO4
C CaCO3
D CaO
Your answer [1]
8 In the UK, water companies typically treat drinking water with chlorine gas at a concentration of
0.500 mg dm–3 or less.
Which statement about UK drinking water is correct?
A Chlorine in drinking water can catalyse the breakdown of ozone.
B Chlorine may form toxic chlorinated hydrocarbons.
C Drinking water with a chlorine gas concentration of 0.500 mg dm–3 contains 2.12 × 1018
chlorine molecules in each dm3.
D In hot weather, chlorine can vaporise from drinking water to cause global warming.
Your answer [1]
© OCR 2024
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