plumiEnergy and matter: OCR A‑Level Chemistry B questions
Every OCR A-Level Chemistry B exam question on DM Energy and matter (specification points DM(n)), 2016–2025, with its mark scheme and examiner’s report.
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Q4(c)
The whole paper ↗![June 2025 Paper 3, question 4(c): Explain why a green filter is used in the colorimeter. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-jun25-04-c-qp.webp?v=3)
Q4(d)
The whole paper ↗![June 2025 Paper 3, question 4(d): Use the students’ results to calculate the percentage by mass of manganese in a paperclip. Percentage by mass = % [3]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-jun25-04-d-qp.webp?v=3)
Q4(b)(i)
The whole paper ↗![June 2022 Paper 3, question 4(b)(i): Plot a graph of absorbance against concentration on the graph paper below and draw an appropriate line of best fit. Label the axes. [3]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-jun22-04-bi-qp.webp?v=3)
Q4(b)(ii)
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Q4(b)(iii)
The whole paper ↗![June 2022 Paper 3, question 4(b)(iii): Explain why an orange filter is placed into the colorimeter before taking the readings. [2] Question 4 continues on page 14](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-jun22-04-biii-qp.webp?v=3)
Q33(b)(iv)
The whole paper ↗![November 2021 Paper 1, question 33(b)(iv): Some students are investigating the reactions of copper(II) sulfate. (iv)* The students have available some solid [Cu(NH3)4(H2O)] SO4. Describe how the students](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-nov21-33-biv-qp.webp?v=3)
Q34(e)
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Q3(c)
The whole paper ↗
All 13 questions on Energy and matter, as a list
- June 2025, Paper 1, Q10 (1 mark): A colorimeter is used to measure the concentration of a copper(II) sulfate solution. What is correct? A A blue filter is used. B A calibration curve of copper i
- June 2025, Paper 3, Q4(c) (2 marks): Explain why a green filter is used in the colorimeter. [2]
- June 2025, Paper 3, Q4(d) (3 marks): Use the students’ results to calculate the percentage by mass of manganese in a paperclip. Percentage by mass = % [3]
- June 2024, Paper 1, Q18 (1 mark): A colorimeter is used to determine the concentration of copper(II) ions in solution. What is correct? Absorbance increases with the concentration of copper(II)
- June 2023, Paper 1, Q6 (1 mark): A colorimeter is used to measure the concentration of a blue solution of copper(II) sulfate(VI). Which of the following is correct? A A blue filter is used. A c
- June 2022, Paper 3, Q4(b)(i) (3 marks): Plot a graph of absorbance against concentration on the graph paper below and draw an appropriate line of best fit. Label the axes. [3]
- June 2022, Paper 3, Q4(b)(ii) (3 marks): Use your graph on page 12 and data from the insert to calculate the percentage by mass of copper in the brass sample. percentage by mass of copper in the brass
- June 2022, Paper 3, Q4(b)(iii) (2 marks): Explain why an orange filter is placed into the colorimeter before taking the readings. [2] Question 4 continues on page 14
- November 2021, Paper 1, Q33(b)(iv) (6 marks): Some students are investigating the reactions of copper(II) sulfate. (iv)* The students have available some solid [Cu(NH3)4(H2O)] SO4. Describe how the students
- November 2020, Paper 1, Q34(e) (6 marks): Some students want to synthesise dyes that will bind well to wool fibres. They read that they can make coloured molecules using coupling reactions between pheno
- June 2019, Paper 1, Q8 (1 mark): The steps involved in measuring the concentration of a coloured solution with a colorimeter are given below in a random order. 1. Measure the absorbance of seve
- June 2018, Paper 1, Q12 (1 mark): Colorimetry is used to find the concentration of an orange solution of iodine. Which statement is correct? A The more concentrated the solution the more light i
- June 2018, Paper 3, Q3(c) (6 marks): Iodine, I2, is an essential dietary element. The recommended maximum daily intake of iodine for an adult is 1.5 × 10−4 g (150 µg). A group of chemistry students
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