Science B, Combined (9-1) - Twenty First Century Science Suite J260 9-1: C3: Chemicals of the natural environment Topical Past Paper Questions
OCR GCSE (9-1) Science B, Combined (9-1) - Twenty First Century Science Suite J260 (9-1) past-paper questions on C3: Chemicals of the natural environment, free. This topic is frequently examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Acids react with some metal compounds to form salts. (a) Table 8.1 shows the reactants and products of some of these reactions. Table 8.1 (i) Complete the table. [2] (ii) Complete the word equation for the reaction between hydrochloric acid and sodium hydroxide. Hydrochloric acid…
Compounds are bonded together ionically or covalently. Models are used to represent these compounds. (a) Sodium (electron arrangement 2.8.1) reacts with chlorine (electron arrangement 2.8.7) to form sodium chloride. Sodium chloride is bonded ionically. Two models are shown to rep…
Aluminium is extracted from aluminium oxide by electrolysis. (a) Solid aluminium oxide is dissolved in a hot, molten compound called cryolite and then electrolysed. (i) Explain why solid aluminium oxide cannot be electrolysed. Use ideas about ions in your answer. (ii) The melting…
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