IGCSE Chemistry (0971) — May–June 2024, Paper 31
8 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 shows the structures of seven substances A-G (A sodium bromide ionic lattice; B methane CH4; C water; D a giant covalent structure; E zinc metal; F a methanol-type…
Answer this question and get it marked →Table 2.1 shows the percentages by mass of the elements present in the human body: calcium 1.50, carbon 18.00, chlorine 0.15, hydrogen 10.00, magnesium 0.05, nitrogen 3.00, oxygen…
Answer this question and get it marked →Aluminium is extracted by electrolysis of its purified ore. Name the main ore of aluminium.
Answer this question and get it marked →Fig. 4.1 shows the displayed formula of a compound extracted from a plant (a molecule containing C=C double bonds and an -OH group). On Fig. 4.1, draw a circle around one…
Answer this question and get it marked →An atom of carbon is represented by the symbol 14/6 C. Describe this atom of carbon in terms of: the position of the electrons, neutrons and protons in this atom; the number of…
Answer this question and get it marked →Large pieces of solid sulfur burn in excess oxygen to produce sulfur dioxide gas. Complete the equation by adding the missing state symbol: S(.....) + O2(g) - SO2(g)
Answer this question and get it marked →Iron is a metal. Iron has a high density, a high melting point and a high boiling point. State three other physical properties of iron.
Answer this question and get it marked →Fig. 8.1 shows the displayed formulae of five organic compounds, V, W, X, Y and Z: V is propane (C3H8); W is ethanol (C2H5OH); X is methanoic acid (HCOOH); Y is ethanedioic acid /…
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