AS & A Level Chemistry (9701) — May–June 2023, Paper 23
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Copper is used in electrical equipment. It has a melting point of 1085 degC. Identify the lattice structure of copper.
Answer this question and get it marked →The reaction of pure aluminium with water is only observed if the aluminium oxide layer is removed first. When pure aluminium is added to cold water, bubbles of gas are seen.…
Answer this question and get it marked →A neutralisation reaction occurs when NaOH(aq) is added to H2SO4(aq). equation 1: 2NaOH(aq) + H2SO4(aq) - Na2SO4(aq) + 2H2O(l) Define enthalpy change of neutralisation, delta H…
Answer this question and get it marked →Hydrogen chloride gas is made in the laboratory by adding concentrated sulfuric acid to potassium chloride. Construct an equation for this reaction.
Answer this question and get it marked →Y is formed from X in a single-step reaction, as shown in Fig. 5.1. X is hexane-2,5-dione type keto-acid (a straight-chain molecule containing a ketone C=O group and a carboxylic…
Answer this question and get it marked →Compound W, CH2=CHCN, is used to make an addition polymer which is present in carbon fibres. Draw one repeat unit of the addition polymer of W.
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