*1859718855*
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 90.
• 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 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8663/X] DC (DE/SW) 353817/6
OCR is an exempt Charity
Turn over
Section A
, 2
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
1 How many covalent bonds can a carbon atom form?
A 2
B 4
C 6
D 8
Your answer
2 What is the ionic equation for neutralisation?
A H– + H2O OH
+
–
B H+ + H2O OH
2–
C 2H2 + 2O 2H2O
HO2
D H+ + O2
Your answer
3 Which atomic model was developed by Thomson?
A
– + –
+
– + – ++ B
+– –
+
C
D
Your answer
© OCR 2025
, 3
[1]
4 The diagram shows calcium carbonate, CaCO3, reacting with an acid.
The equation for the reaction is:
CaCO3(s) + 2HCl (aq) CaCl2(aq) + H2O(l) + CO2(g)
What happens to the mass displayed on the balance as the reaction progresses?
A Decreases
B Decreases then increases
C Increases
D Stays the same
Your answer
5 Which ion do solutions of all alkalis contain?
A K+
B H+
C O
H
–
D S
O
4
2
–
© OCR 2025 Turn over
, 4
Your answer
6 What is the relative formula mass of butanoic acid, C3H7COOH?
Relative atomic mass (Ar): C = 12.0 H = 1.0 O = 16.0
A 29.0
B 44.0
C 88.0
D 120.0
Your answer
7 What type of bonding is found in all polymers?
A Covalent
B Electrostatic
C Ionic
D Metallic
Your answer
8 Propene has the molecular formula C3H6.
What is the empirical formula?
A CH2
B CH3
C CH2CHCH3
D C3H6
Your answer
9 Which statement is true of all the diagrams of a water molecule?
© OCR 2025
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 90.
• 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 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8663/X] DC (DE/SW) 353817/6
OCR is an exempt Charity
Turn over
Section A
, 2
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
1 How many covalent bonds can a carbon atom form?
A 2
B 4
C 6
D 8
Your answer
2 What is the ionic equation for neutralisation?
A H– + H2O OH
+
–
B H+ + H2O OH
2–
C 2H2 + 2O 2H2O
HO2
D H+ + O2
Your answer
3 Which atomic model was developed by Thomson?
A
– + –
+
– + – ++ B
+– –
+
C
D
Your answer
© OCR 2025
, 3
[1]
4 The diagram shows calcium carbonate, CaCO3, reacting with an acid.
The equation for the reaction is:
CaCO3(s) + 2HCl (aq) CaCl2(aq) + H2O(l) + CO2(g)
What happens to the mass displayed on the balance as the reaction progresses?
A Decreases
B Decreases then increases
C Increases
D Stays the same
Your answer
5 Which ion do solutions of all alkalis contain?
A K+
B H+
C O
H
–
D S
O
4
2
–
© OCR 2025 Turn over
, 4
Your answer
6 What is the relative formula mass of butanoic acid, C3H7COOH?
Relative atomic mass (Ar): C = 12.0 H = 1.0 O = 16.0
A 29.0
B 44.0
C 88.0
D 120.0
Your answer
7 What type of bonding is found in all polymers?
A Covalent
B Electrostatic
C Ionic
D Metallic
Your answer
8 Propene has the molecular formula C3H6.
What is the empirical formula?
A CH2
B CH3
C CH2CHCH3
D C3H6
Your answer
9 Which statement is true of all the diagrams of a water molecule?
© OCR 2025
