IGCSE Chemistry (0971) — October–November 2024, Paper 32

Fig. 1.1 shows part of the Periodic Table, including elements H, He, N, Na, Al, S, Ar, K, Ca, Zn, Br, I, Ba, Au. Give the symbol of the element that is 78% of clean, dry air.

Hydrogen chloride has a simple molecular structure. State two physical properties of a compound with a simple molecular structure.

The list shows some substances present in water from natural sources: dissolved oxygen, calcium compounds, plastics, harmful microbes. State which one of these substances provides…

Fig. 4.1 shows the displayed formula of compound A, which contains an alcohol functional group. On Fig. 4.1, draw a circle around the alcohol functional group.

Table 5.1 shows the melting points, boiling points and densities of five halogens (fluorine, chlorine, bromine, iodine, astatine). Use the information in Table 5.1 to predict the…

Many metals have high melting points and boiling points. State three other typical physical properties of metals.

Crystals of zinc sulfate are made by warming excess solid zinc oxide with dilute sulfuric acid: ZnO(s) + H2SO4(aq) → ZnSO4(aq) + H2O(l). State the meaning of the state symbol (aq).

A student investigates the reaction of small pieces of calcium carbonate with excess dilute hydrochloric acid of three different concentrations (0.5, 1.0, 2.0 mol/dm³). Table 8.1…