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2025/ 2026 GCSE (9–1) May 2024 OCR Chemistry B Paper 3 Including Mark Scheme 100% Verified with Correct Questions and Answers with Solution

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Access the GCSE (9–1) May 2024 OCR Chemistry B Paper 3 Including Mark Scheme with solution, featuring 100% verified questions and answers aligned with the official OCR Chemistry B specification. This revision resource supports students in consolidating key chemistry knowledge, applying examiner marking criteria, and improving exam technique across Paper 3 topics. Updated 2025/ 2026 materials provide realistic exam practice, strengthen problem-solving skills, and enhance accuracy, confidence, and overall performance in OCR GCSE Chemistry B assessments.

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Institution
GCSE
Course
CHEMISTRY B

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GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf




Friday 17 May 2024 – Morning
GCSE (9−1) Chemistry B (Twenty First Century Science)
J258/03 Breadth in Chemistry (Higher Tier)
Time allowed: 1 hour 45 minutes




Turn over



GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf

,GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf



2
1 Fertilisers are used to increase the growth of plants.

They are added to soil to provide essential plant nutrient elements.

(a) Nitrogen is one essential plant nutrient element.

Name two other essential plant nutrient elements.

1 .......................................................................................................................................................

2 .......................................................................................................................................................
[2]

(b)
(i) State one disadvantage of the over-use of synthetic fertilisers.

..........................................................................................................................................................

..................................................................................................................................................... [1]

(ii) Suggest why farmers still use synthetic fertilisers despite their disadvantages.

..........................................................................................................................................................

..................................................................................................................................................... [1]




© OCR 2024




GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf

,GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf



3
(c) An example of a synthetic fertiliser is ammonium nitrate, NH4NO3.

Ammonium nitrate is produced when ammonium hydroxide, NH4OH, reacts with nitric acid, HNO3.

NH4OH(aq) + HNO3(aq) NH4NO3(aq) + H2O(l)

The relative formula masses for the reactants and products are shown in the table.

NH4OH HNO3 NH4NO3 H2O
Relative formula mass 35.0 63.0 80.0 18.0

Calculate the atom economy for the formation of NH4NO3.

Use the equation:

mass of atoms in desired product
atom economy = × 100%
total mass of atoms in reactants

Give your answer to 1 decimal place.




Atom economy = ..................................................... % [4]




© OCR 2024 Turn over



GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf

, GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf



4
2 Sodium chloride is an ionic compound.

(a) Fig. 2.1 shows three models of the arrangement of ions in sodium chloride.

Fig. 2.1

_
_ + _ + _
+ _ + _ + _ +
_ + _ + _
+ _ _ +
+ _ _ +
_ + _
+ _ +
+_ _+
+


Model A Model B Model C

(i) Describe the attraction between ions in sodium chloride.

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..................................................................................................................................................... [2]

(ii) Which two statements about the limitations of the models in Fig. 2.1 are true?

Tick (✓) two boxes.

Model A does not show the relative sizes of the ions.

Model C does not show the 3-D arrangement of ions.

None of the models show that sodium chloride is a compound
containing two elements.

Only one model shows that a chloride ion is an anion.
[2]




© OCR 2024




GCSE (9−1) MAY 2024 OCRGCSE
CHEMISTRY
(9−1) MAY
B PAPER
2024 OCR
3 INCLUDING
GCSE
CHEMISTRY
(9−1)
MARKMAY
B PAPER
SCHEME.pdf
2024 OCR
3 INCLUDING
CHEMISTRY
MARK
B PAPER
SCHEME.pdf
3 INCLUDING MARK SCHEME.pdf
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Written in
2025/2026
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  • ocr chemistry b paper 3 may 2024
  • gcse 91 ocr chemistry b revision
  • ocr gcse chemistry b exam questions and answers
  • ocr chemistry b mark scheme
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