AS & A Level Chemistry (9701) — October–November 2023, Paper 23
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The elements phosphorus, sulfur and chlorine are in Period 3 of the Periodic Table. Table 1.1 shows some properties of the elements P to Cl. The first ionisation energy of S is…
Answer this question and get it marked →Barium hydroxide, Ba(OH)2, is a strong base used in inorganic and organic reactions. Fig. 2.1 shows a reaction scheme involving Ba(OH)2: BaO(s) reacts with H2O(l) in reaction 1 to…
Answer this question and get it marked →Potassium chlorate, KClO3, is widely used as an oxidising agent and to make O2(g). Define oxidising agent.
Answer this question and get it marked →Compounds C and D are alkenes with the same molecular formula, C5H10. [Fig. 4.1: C is 2-methylbut-2-ene, (CH3)2C=CHCH3, drawn skeletally. D is 3-methylbut-1-ene, (CH3)2CHCH=CH2,…
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