Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
A-level Summer 2026
CHEMISTRY Predicted
Paper 1 Inorganic and Physical Chemistry
Afternoon Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• The Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements
1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
9
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want 10
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 105.
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7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 A time-of-flight (TOF) mass spectrometer is used to analyze a sample.
Explain why the apparatus is kept under high vacuum.
[2 marks]
0 1 . 2 Describe how electron impact ionisation works.
[3 marks]
0 1 . 3 Explain why lighter ions reach the detector before heavier ions.
[2 marks]
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, 3
Do not write
outside the
0 1 . 4 The figure 1 below represents the mass spectrum of zirconium. box
v
Figure 1
Explain why the spectrum shows more than one peak.
[1 mark]
0 1 . 5 Calculate the relative atomic mass of zirconium using the data shown in the Table 1
[2 marks]
Table 1
Isotope Abundance (%)
⁹⁰Zr 51.45
⁹¹Zr 11.22
⁹²Zr 17.15
⁹⁴Zr 17.38
⁹⁶Zr 2.80
Question 1 continues on the next page
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, 4
Do not write
outside the
box
0 1 . 6 Explain why the relative atomic mass is not a whole number.
[1 mark]
0 1 . 7 Suggest one reason why one peak is much larger than the others.
[1 mark]
12
for more papers: tyrionpapers.com
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
A-level Summer 2026
CHEMISTRY Predicted
Paper 1 Inorganic and Physical Chemistry
Afternoon Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• The Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements
1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
9
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want 10
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 105.
for more papers: tyrionpapers.com
7405/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 A time-of-flight (TOF) mass spectrometer is used to analyze a sample.
Explain why the apparatus is kept under high vacuum.
[2 marks]
0 1 . 2 Describe how electron impact ionisation works.
[3 marks]
0 1 . 3 Explain why lighter ions reach the detector before heavier ions.
[2 marks]
for more papers: tyrionpapers.com
, 3
Do not write
outside the
0 1 . 4 The figure 1 below represents the mass spectrum of zirconium. box
v
Figure 1
Explain why the spectrum shows more than one peak.
[1 mark]
0 1 . 5 Calculate the relative atomic mass of zirconium using the data shown in the Table 1
[2 marks]
Table 1
Isotope Abundance (%)
⁹⁰Zr 51.45
⁹¹Zr 11.22
⁹²Zr 17.15
⁹⁴Zr 17.38
⁹⁶Zr 2.80
Question 1 continues on the next page
for more papers: tyrionpapers.com
, 4
Do not write
outside the
box
0 1 . 6 Explain why the relative atomic mass is not a whole number.
[1 mark]
0 1 . 7 Suggest one reason why one peak is much larger than the others.
[1 mark]
12
for more papers: tyrionpapers.com
