AS & A Level Chemistry (9701) — February–March 2023, Paper 42
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The most common zinc mineral contains zinc(II) sulfide, ZnS. Complete the electrons in boxes diagram in Fig. 1.1 to show the electronic configuration of a zinc(II) ion. (The…
Answer this question and get it marked →Hypophosphorous acid is an inorganic acid. The conjugate base of hypophosphorous acid is H2PO2⁻. Give the formula of hypophosphorous acid.
Answer this question and get it marked →Vanadium is a transition element in Period 4 of the Periodic Table. Define transition element.
Answer this question and get it marked →Ethylamine (CH3CH2NH2) and phenylamine (C6H5NH2) are primary amines, synthesised by different methods. Ethylamine forms when ethanamide, CH3CONH2, is reduced by LiAlH4. Write an…
Answer this question and get it marked →Tulobuterol is used in some medicines and contains a benzene ring in its structure. Describe and explain the shape of benzene. In your answer include the bond angle between carbon…
Answer this question and get it marked →A student uses thin-layer chromatography (TLC) to analyse a mixture containing different metal cations, repeating the experiment with different solvents. Fig. 6.1 shows the…
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