Science Combined 0653: C3. Atoms, elements and compounds Topical Past Paper Questions
Cambridge IGCSE Science Combined (0653) past-paper questions on C3. Atoms, elements and compounds, free. This topic is frequently examined across 26 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
(a) Table 5.1 shows information about some bases. (i) Complete Table 5.1. Table 5.1 [2] (ii) Explain why some bases are not alkalis. [1] (b) (i) Bases react with acids. Complete the equation to show the general products formed when a base reacts with an acid. base + acid $ \right…
A student investigates the rate of reaction between large pieces of magnesium carbonate, MgCO $ _{3} $, and dilute hydrochloric acid, HCl, using the apparatus shown in Fig. 4.1. The student records the time taken to produce $ 10 \, cm^{3} $ of gas. Fig. 4.1 (a) Three products are…
(a) Fig. 5.1 shows the electrolysis of molten zinc chloride using inert electrodes. Fig. 5.1 (i) Explain why the zinc chloride must be molten in this electrolysis. [1] (ii) Suggest why the electrodes are inert. [1] (iii) Describe what happens at the negative electrode in terms of…
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