2025/ 2026 AS-Level May 2024 OCR Chemistry A Paper 1 Including Mark Scheme 100% Verified with Correct Questions and Answers

AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf




Tuesday 14 May 2024 – Morning
AS Level Chemistry A
H032/01 Breadth in chemistry
Time allowed: 1 hour 30 minutes




Turn over



AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf

,AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf



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




AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf

,AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf



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



AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf

, AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf



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




AS -LEVEL MAY 2024 OCR CHEMISTRY
AS -LEVEL A
MAY
PAPER
20241OCR
INCLUDING
CHEMISTRY
AS -LEVEL
MARKA
MAY
SCHEME.pdf
PAPER
20241OCR
INCLUDING
CHEMISTRY
MARKA SCHEME.pdf
PAPER 1 INCLUDING MARK SCHEME.pdf