AS & A Level Chemistry (9701) — October–November 2023, Paper 43
9 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fluorine reacts with chlorine dioxide, ClO₂, as shown: F₂(g) + 2ClO₂(g) → 2FClO₂(g). The rate of the reaction is first order with respect to the concentration of F₂ and first…
Answer this question and get it marked →Define Kw mathematically by completing the expression Kw = ...
Answer this question and get it marked →Hydrogen peroxide is a liquid at 298 K. It is moderately stable under room conditions but will decompose quickly if a catalyst is added (reaction 1: 2H₂O₂(l) → 2H₂O(l) + O₂(g)).…
Answer this question and get it marked →Cobalt(II) nitrate, Co(NO₃)₂, is a reddish-brown crystalline solid. It dissolves in water to form a solution containing [Co(H₂O)₆]²⁺ complex ions. Complete Table 4.1 giving the…
Answer this question and get it marked →Transition elements behave as catalysts and can form complex ions. Explain why transition elements behave as catalysts.
Answer this question and get it marked →Five ligands are listed in Table 6.1: NH₃, EDTA⁴⁻, CN⁻, H₂NCH₂CH₂NHCH₂CH₂NH₂ (given as tridentate), C₂O₄²⁻. Complete Table 6.1 using the words monodentate, bidentate and…
Answer this question and get it marked →Sunset Yellow is an additive used for colouring foods. A synthetic route is shown (Fig. 7.1): molecule E (⁻O₃SC₆H₄NH₂) reacts in step 1 to form F; F reacts with G (HOC₁₀H₆SO₃⁻) in…
Answer this question and get it marked →Capsaicin is found in chilli peppers. Its structure is a methoxy-substituted, hydroxy-substituted benzene ring bonded via a CH₂ group to an N-H of an amide, whose carbonyl is part…
Answer this question and get it marked →Benzoyl chloride, C₆H₅COCl, can be made from ethyl benzene in a two-step process: ethyl benzene → compound M (step 1) → benzoyl chloride (step 2). Draw the intermediate organic…
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