Sciences Co-ordinated 9-1 0973: C4 - Electricity and chemistry Topical Past Paper Questions
Cambridge IGCSE Sciences Co-ordinated 9-1 (0973) past-paper questions on C4 - Electricity and chemistry, free. This topic is frequently examined across 13 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
(a) The formula of sulfuric acid is $ \mathrm{H_2SO_4} $. Calculate the relative molecular mass $ M_r $ of sulfuric acid. $ [A_r : H, 1; O, 16; S, 32] $ relative molecular mass $M_{r}=$ [2] (b) Figure 8.1 shows the electrolysis of dilute sulfuric acid using inert electrodes. Figu…
Hydrogen-oxygen fuel cells use hydrogen and oxygen to produce electricity. a) The reactions at the electrodes in a hydrogen-oxygen fuel cell are shown. anode: $\mathrm{H}_{2} \rightarrow 2\mathrm{H}^{+} + 2\mathrm{e}^{-}$ cathode: $4\mathrm{H}^{+}+\mathrm{O}_{2}+4\mathrm{e}^{-}\r…
A student investigates the reactivity of metals by measuring the voltage in electrochemical cells. When two different metals are dipped into an aqueous salt solution they produce a voltage. The larger the difference between the reactivity of the two metals the greater the voltage…
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