Chemistry 0620: SEPARATING SUBSTANCES Topical Past Paper Questions
Cambridge IGCSE Chemistry (0620) past-paper questions on SEPARATING SUBSTANCES, free. This topic is frequently examined across 26 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Alkanes are flammable hydrocarbons. Table 1.1 gives the boiling points of three alkanes. Table 1.1 | alkane | boiling point/°C | |---|---| | hexane | 69 | | pentane | 36 | | undecane | 196 | A student uses the apparatus shown in Figure 1.1 to separate a mixture of the three alkan…
Eggshells are made from a mixture of calcium carbonate and other insoluble substances. Calcium carbonate reacts with dilute hydrochloric acid. The equation for the reaction is shown. $$\mathrm{CaCO_{3}(s) + 2HCl(aq) \rightarrow CaCl_{2}(aq) + H_{2}O(l) + CO_{2}(g)}$$ The other su…
Calcium carbonate is an insoluble solid. Calcium carbonate can be made by adding excess aqueous calcium chloride to aqueous sodium carbonate. $$ \mathrm{CaCl_{2}(aq) + Na_{2}CO_{3}(aq) \rightarrow CaCO_{3}(s) + 2NaCl(aq)} $$ A student makes a sample of calcium carbonate. The firs…
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