IGCSE Chemistry (0620) — 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 →Answer the following questions using only the structures in Fig. 1.1 (A = sodium bromide giant ionic lattice; B = methane CH4; C = water H2O; D = oxygen O2; E = zinc metallic…
Answer this question and get it marked →Table 2.1 shows the percentages by mass of the elements present in the human body (element; percentage by mass): calcium 1.50; carbon 18.00; chlorine 0.15; hydrogen 10.00;…
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, containing two carbon-carbon double bonds (C=C) and a hydroxyl/alcohol group. On Fig. 4.1, draw a circle…
Answer this question and get it marked →An atom of carbon is represented by the symbol ¹⁴₆C (mass number 14, atomic number 6). Describe this atom of carbon in terms of: the position of the electrons, neutrons and…
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 (CH3CH2CH3). W is ethanol (CH3CH2OH). X is methanoic acid (HCOOH). Y is ethanoic…
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