plumiIntroduction: Edexcel International GCSE Chemistry questions
Every Edexcel International GCSE Chemistry exam question on Introduction (specification points 4.1–4.6), 2019–2025, with its mark scheme and examiner’s report.
Paper
All papers
Exam
All years
Calculations
Q5(c)(i)
The whole paper ↗Q9(d)(i)
The whole paper ↗Q10(b)(i)
The whole paper ↗Q10(b)(ii)
The whole paper ↗Q8(a)(i)
The whole paper ↗Q5(a)
The whole paper ↗Q5(a)(i)
The whole paper ↗Q4(a)(i)
The whole paper ↗Q4(c)(i)
The whole paper ↗Q7(a)
The whole paper ↗Q7(b)
The whole paper ↗Q7(d)
The whole paper ↗Q7(e)
The whole paper ↗Q3(b)(i)
The whole paper ↗Q5(a)(i)
The whole paper ↗Q5(a)(iii)
The whole paper ↗Q4(a)(i)
The whole paper ↗Your answerQ4(a)(ii)
The whole paper ↗Q5(a)(i)
The whole paper ↗Q5(a)(ii)
The whole paper ↗
All 49 questions on Introduction, as a list
- June 2025, Paper 1, Q5(c)(i) (2 marks): State what is meant by the term isomers. (2)
- June 2025 (R), Paper 1, Q9(d)(i) (2 marks): Explain what is meant by the term isomers. (2)
- November 2024, Paper 1, Q10(b)(i) (2 marks): Compounds in the same homologous series have the same general formula. Give two other characteristics of compounds in the same homologous series. (2) 1 2
- November 2024, Paper 1, Q10(b)(ii) (2 marks): Explain why the alkenes in the diagram are isomers. (2)
- June 2024, Paper 1, Q8(a)(i) (2 marks): Explain what is meant by the term isomers. (2)
- June 2024, Paper 2, Q5(a) (2 marks): Give two characteristics of a homologous series. (2) 1 2
- November 2023, Paper 1, Q5(a)(i) (2 marks): State what is meant by the term isomers. (2)
- June 2023, Paper 1, Q4(a)(i) (2 marks): Give two characteristics of a homologous series. (2) 1 2
- June 2023, Paper 1, Q4(c)(i) (2 marks): Give the molecular formula and the empirical formula of this compound. (2) molecular formula empirical formula
- January 2023, Paper 1, Q7(a) (1 mark): Give a reason why compound X is not a hydrocarbon. (1)
- January 2023, Paper 1, Q7(b) (1 mark): Give the letter of the compound that is a saturated hydrocarbon with the empirical formula CH2 (1)
- January 2023, Paper 1, Q7(d) (1 mark): Give the structural formula of compound Y. (1)
- January 2023, Paper 1, Q7(e) (2 marks): Explain why compounds W and Y are isomers. (2)
- January 2023 (R), Paper 1, Q3(b)(i) (2 marks): State what is meant by the term isomers. (2)
- January 2023 (R), Paper 1, Q5(a)(i) (1 mark): Give the total number of atoms in one molecule of methanoic acid. (1)
- January 2023 (R), Paper 1, Q5(a)(iii) (2 marks): Explain why methanoic acid is not a hydrocarbon. (2)
- January 2023 (R), Paper 2, Q4(a)(i) (1 mark): What type of formula is shown for P? (1) A a displayed formula B an empirical formula C a molecular formula D a structural formula
- January 2023 (R), Paper 2, Q4(a)(ii) (2 marks): Compounds P, Q and R are members of the same homologous series. Give two properties of a homologous series. (2) 1 2
- June 2022, Paper 1, Q5(a)(i) (2 marks): State what is meant by the term isomers. (2)
- June 2022, Paper 2, Q5(a)(ii) (1 mark): Draw the structural formula of a compound with the molecular formula C2H4O2 (1)
- June 2022 (R), Paper 2, Q3(a)(ii) (1 mark): Which of these has the same empirical formula and molecular formula? (1) A CH2 B C2H6 C C3H8 D C4H10
- June 2022 (R), Paper 2, Q5(c)(i) (1 mark): State what is meant by the term functional group. (1)
- January 2022, Paper 1, Q8(a)(i) (1 mark): Give the letter of a compound not shown as a displayed formula. (1)
- January 2022, Paper 1, Q8(a)(ii) (1 mark): Give the letter of a saturated compound with the general formula CnH2n (1)
- January 2022, Paper 1, Q8(a)(iv) (2 marks): Explain why compound A and compound D are isomers. (2)
- January 2022, Paper 2, Q1(a)(i) (2 marks): State the meaning of the term hydrocarbon. (2)
- November 2021, Paper 1, Q6(a)(i) (1 mark): Give the letter of the compound that is not a hydrocarbon. (1)
- November 2021, Paper 1, Q6(a)(ii) (1 mark): Give the letter of the compound that is a saturated hydrocarbon with the empirical formula CH2 (1)
- November 2021, Paper 1, Q6(a)(vi) (2 marks): Compounds U and X are members of the same homologous series. Members of the same homologous series have the same functional group. Give two other characteristic
- June 2021, Paper 1, Q5(b)(iii) (1 mark): State the term used for compounds with the same molecular formula but different structural formulae. (1)
- June 2021, Paper 2, Q5(a) (2 marks): Give two characteristics of a homologous series. (2) 1 2
- January 2021, Paper 1, Q9(a) (2 marks): State why propane is a hydrocarbon. (2)
- January 2021, Paper 1, Q10(b) (2 marks): The diagram represents two isomers with the formula C5H12 H H H H H H H H H H C C C C C H H C C C C H H H H H H H H H H C H H Explain why these compounds are is
- January 2021 (R), Paper 1, Q8(a)(i) (2 marks): Organic compounds can exist as isomers. Explain what is meant by the term isomers. (2)
- November 2020, Paper 1, Q6(a)(i) (2 marks): Explain which homologous series compound B belongs to. (2)
- November 2020, Paper 1, Q6(a)(ii) (1 mark): Give the letter of the compound that has the same empirical formula as its molecular formula. (1)
- November 2020, Paper 1, Q6(a)(iii) (3 marks): Compound F exists as two isomers. Explain what is meant by the term isomers. Include the structures of the two isomers of compound F in your answer. (3)
- November 2020 (R), Paper 1, Q3(a) (4 marks): Complete the table by giving the missing information about the alkene with the molecular formula C3H6 (4) Molecular formula C3H6 Name Empirical formula General
- November 2020 (R), Paper 1, Q3(d)(i) (2 marks): State what is meant by the term isomers. (2)
- November 2020 (R), Paper 1, Q3(d)(ii) (2 marks): Draw the displayed formulae of the two isomers with the formula C2H4Cl2 (2) isomer 1 isomer 2
- November 2020 (R), Paper 1, Q5(a)(i) (1 mark): Determine the number of atoms in one molecule of methanol. (1)
- November 2020 (R), Paper 1, Q5(a)(ii) (1 mark): State why methanol is not a hydrocarbon. (1)
- January 2020, Paper 1, Q5(a)(i) (1 mark): Give the letter of the compound that is not a hydrocarbon. (1)
- January 2020, Paper 1, Q5(a)(ii) (1 mark): Give the letters of the two compounds that have the same empirical formula. (1)
- January 2020, Paper 1, Q5(c) (2 marks): Compounds P, Q and R are members of the same homologous series. Give two characteristics of a homologous series. (2) 1 2
- January 2020 (R), Paper 1, Q9(a)(i) (2 marks): Ethene (C2H4) can be represented by different types of formula. Complete the table by giving the missing information. (2) Molecular formula C2H4 Empirical formu
- January 2020 (R), Paper 1, Q9(a)(ii) (2 marks): Ethene is a member of the homologous series of alkenes. All members of the same homologous series have the same general formula. Give two other characteristics
- June 2019, Paper 1, Q10(a)(i) (2 marks): State what is meant by the term isomers. (2)
- June 2019 (R), Paper 1, Q4(a) (2 marks): State the meaning of the term hydrocarbon. (2)
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