Chemistry A (9-1) - Gateway Science Suite J248 9-1: Chemical reactions Topical Past Paper Questions
OCR GCSE (9-1) Chemistry A (9-1) - Gateway Science Suite J248 (9-1) past-paper questions on Chemical reactions, free. This topic is frequently examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
The first member of the alkane homologous series is methane, $ CH_{4} $. (a) State the formula of the alkane with 10 carbon atoms. [1] (b) Write the balanced symbol equation for the complete combustion of methane. [2] (c) Methane can also undergo incomplete combustion. Carbon mon…
Group 7 elements (halogens) react with halides in solution. Chlorine reacts with potassium bromide to form potassium chloride and bromine. $ \text{Cl}_2(g) + 2\text{KBr(aq)} \rightarrow 2\text{KCl(aq)} + \text{Br}_2(aq) $ (a) Describe what you would observe in the reaction. [1] (…
Hydrogen sulfide, $ \mathrm{H_2S} $, reacts with oxygen, $ \mathrm{O_2} $, to form sulfur dioxide, $ \mathrm{SO_2} $, and water. The balanced symbol equation is shown. $ 2\mathrm{H_2S}(g) + 3\mathrm{O_2}(g) \rightarrow 2\mathrm{SO_2}(g) + 2\mathrm{H_2O}(l) $ (a) A scientist sets…
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