Free AQA GCSE Chemistry (8462) Exam Questions and Answers

This question is about mixtures. Substances are separated from a mixture using different methods. Draw one line from each substance and mixture to the best method of separation. Substance and mixture: - Ethanol from ethanol and water - Salt from sea water - The different colours in black ink Method of separation: - Chromatography - Crystallisation - Electrolysis - Filtration - Fractional distillation

Type your answer, then reveal.

This question is about mixtures. A student filters a mixture. Figure 1 shows the apparatus. Suggest one improvement to the apparatus.

Type your answer, then reveal.

This question is about mixtures. Complete the sentences. Choose answers from the box. condense evaporate freeze melt solidify In simple distillation, the mixture is heated to make the liquid ____ . The vapour is then cooled to make it ____ .

Type your answer, then reveal.

This question is about mixtures. Figure 2 shows the arrangement of atoms in a pure metal and in a mixture of metals. Calculate the percentage of metal B atoms in the mixture of metals shown in Figure 2. Percentage of metal B atoms = ____ %

Type your answer, then reveal.

This question is about mixtures. What is a mixture of metals called? Tick one box.

• AA. An alloy
• BB. A compound
• CC. A molecule
• DD. A polymer

This question is about mixtures. Why is the mixture of metals in Figure 2 harder than the pure metal? Tick one box.

• AA. The atoms in the mixture are different shapes.
• BB. The layers in the mixture are distorted.
• CC. The layers in the mixture slide more easily.
• DD. The mixture has a giant structure.

This question is about mixtures. A nanoparticle of pure metal A is a cube. Each side of the cube has a length of 20 nm. Figure 3 shows the cube. What is the volume of the nanoparticle? Tick one box.

• AA. 20 nm³
• BB. 60 nm³
• CC. 400 nm³
• DD. 8000 nm³

The Periodic Table of Elements Periodic table of the elements (groups 1 to 7 and 0) showing for each element its relative atomic mass, atomic symbol, name and atomic (proton) number. Key: relative atomic mass / atomic symbol / name / atomic (proton) number. The Lanthanides (atomic numbers 58 – 71) and the Actinides (atomic numbers 90 – 103) have been omitted. The halogens are elements in Group 7. Bromine is in Group 7. Give the number of electrons in the outer shell of a bromine atom.

Type your answer, then reveal.

The halogens are elements in Group 7. Bromine reacts with hydrogen. The gas hydrogen bromide is produced. What is the structure of hydrogen bromide? Tick one box.

• AA. Giant covalent
• BB. Ionic lattice
• CC. Metallic structure
• DD. Small molecule

The halogens are elements in Group 7. What is the formula for fluorine gas? Tick one box.

• AA. F
• BB. F₂
• CC. F²
• DD. 2F