IGCSE Chemistry (0620) — October–November 2023, Paper 33
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 substances from the list (ammonia, calcium oxide, carbon monoxide, cobalt(II) chloride, ethane, ethanol, ethene, oxygen, potassium…
Answer this question and get it marked →Hydrocarbons are compounds of carbon and hydrogen. State the meaning of the term compound.
Answer this question and get it marked →Table 3.1 shows the average concentrations, in ng / 1000 cm³, of air pollutants in four different years. year carbon monoxide hydrocarbons oxides of nitrogen particulates sulfur…
Answer this question and get it marked →Nitrogen is a gas at room temperature. State two general properties of a gas.
Answer this question and get it marked →This question is about metals. Table 5.1 shows some properties of the Group I metals. metal melting point in °C boiling point in °C atomic volume in cm³ / mol observations on…
Answer this question and get it marked →Hydrogen peroxide, H2O2, breaks down slowly at 40 °C to produce oxygen gas and water: 2H2O2 → 2H2O + O2 A student investigates the breakdown of hydrogen peroxide at 40 °C in the…
Answer this question and get it marked →Ethanoic acid and methacrylic acid are both carboxylic acids. Complete the word equation for the reaction of ethanoic acid with calcium: ethanoic acid + calcium → +
Answer this question and get it marked →Potassium chloride is an ionic compound. Complete Fig. 8.1 to show the electronic configuration of a potassium ion and the charge on the ion. (Fig. 8.1 shows a K symbol with empty…
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