Sciences Co-ordinated 9-1 0973: C10 - Air and water Topical Past Paper Questions
Cambridge IGCSE Sciences Co-ordinated 9-1 (0973) past-paper questions on C10 - Air and water, 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 student determines the value of x in the formula of washing soda, $ \mathrm{Na}_{2}\mathrm{CO}_{3} \cdot x\mathrm{H}_{2}\mathrm{O} $. When washing soda crystals are heated, they release water from the crystals. The crystals form dry sodium carbonate powder as shown in the equat…
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…
Pure water boils at a temperature of $ 100^{\circ}C $. When salt is dissolved in the water, the boiling temperature increases. Plan an experiment to find the relationship between the mass of salt added to water and the increase in boiling temperature. You are provided with: - pur…
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