AS & A Level Chemistry (9701) — May–June 2025, Paper 24
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →State the type of lattice structure present in magnesium, silicon and phosphorus, P4. Give the name of each type of lattice structure.
Answer this question and get it marked →SCl2 is a molecule with a non-linear shape. (i) State the shape of SCl2. (ii) State the bond angle in SCl2.
Answer this question and get it marked →H2(g) and I2(g) react to form HI(g) in a reversible reaction: H2(g) + I2(g) ⇌ 2HI(g). In three separate experiments, a student combines different amounts of two or more of these…
Answer this question and get it marked →An ester E has the molecular formula C5H10O2. Give the molecular formula of E.
Answer this question and get it marked →W has two positional isomers. Only one shows stereoisomerism. Draw the structures of the two positional isomers of W in the boxes.
Answer this question and get it marked →P, Q and R are three different hydrocarbon molecules. Hydrocarbon P contains 85.7% by mass of carbon. (i) Define empirical formula. (ii) Calculate the empirical formula of P. Show…
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