OCR GCSE Chemistry B questions by topic
Every question from every OCR GCSE Chemistry B (Twenty First Century Science) paper, 2018–2025, part by part. Filter by topic, paper or year, open the mark scheme under any question, and download a set as a PDF.
Paper
All papers
Exam
All years
Calculations

How many marks did you get?
Q1(a)(ii)
The whole paper ↗
Q1(a)(iii)
The whole paper ↗
Q1(b)(i)
The whole paper ↗
Q1(b)(ii)
The whole paper ↗
Q2(a)(i)
The whole paper ↗
Q2(a)(ii)
The whole paper ↗
Q2(b)(i)
The whole paper ↗
Q2(b)(ii)
The whole paper ↗
Q2(b)(iii)
The whole paper ↗

How many marks did you get?
Q3(b)(i)
The whole paper ↗
Q3(b)(ii)
The whole paper ↗
Q3(c)(i)
The whole paper ↗
Q3(c)(ii)
The whole paper ↗
Q4(a)(i)
The whole paper ↗
Q4(a)(ii)
The whole paper ↗
Q4(a)(iii)
The whole paper ↗
Q4(b)(i)
The whole paper ↗
Q4(b)(ii)
The whole paper ↗
Questions, mark schemes and examiner’s reports are © OCR, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Every OCR GCSE Chemistry B paper.
Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.