IGCSE Chemistry (0620) — May–June 2024, Paper 43
7 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Name the process used to produce ammonia from nitrogen.
Answer this question and get it marked →Complete Table 2.1 (atom or ion; number of protons; number of electrons; number of neutrons): atom or ion protons electrons neutrons ------ ------ ------ ------ ⁶³₂₉Cu 29 ³⁷₁₇Cl⁻…
Answer this question and get it marked →This question is about elements and compounds. Some properties of graphite, oxygen and carbon monoxide are shown in Table 3.1 (melting point / °C; boiling point / °C; conduction…
Answer this question and get it marked →Dinitrogen tetroxide, N2O4, decomposes into nitrogen dioxide, NO2. The reaction is reversible: N2O4(g) ⇌ 2NO2(g) (N2O4 colourless gas, NO2 brown gas) A sealed gas syringe contains…
Answer this question and get it marked →Barium sulfate, BaSO4, is an insoluble salt and is made by precipitation. Name two aqueous solutions that produce a precipitate of barium sulfate when they are mixed.
Answer this question and get it marked →This question is about iron. Fig. 6.1 shows a blast furnace used to extract iron from its ore, with raw materials (coke, iron ore, limestone) added at the top, waste gases leaving…
Answer this question and get it marked →Many organic compounds contain carbon and hydrogen only. An organic compound A has the composition by mass C 83.33%, H 16.67%. Calculate the empirical formula of compound A. [Ar:…
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