CHEM 238 GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry Paper 2H Qp 2020

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 2H H 2 *02* IB/M/Jun20/8464/C/2H 0 1 This question is about the Earth’s resources. When most fuels burn carbon dioxide is produced. Propane (C3H8) is a fuel. 0 1 . 1 Balance the equation for the combustion of propane. [1 mark] C3H8 + O2 → 3CO2 + 4H2O 0 1 . 2 Describe the test for carbon dioxide. Give the result of the test. [2 marks] Test Result 0 1 . 3 Propane can be cracked to produce propene and hydrogen. Complete the symbol equation for the reaction. [1 mark] C3H8 → + H2 propane propene hydrogen Do not write outside the box 3 *03* Turn over ► IB/M/Jun20/8464/C/2H Do not write outside the box 9 0 1 . 4 Describe the test for hydrogen. Give the result of the test. [2 marks] Test Result 0 1 . 5 Propene is an alkene. Describe the test for alkenes. Give the colour change in the test. [3 marks] Test Colour change to Turn over for the next question