Chemistry 0620: ELECTRICITY AND CHEMICAL CHANGES Topical Past Paper Questions

A student uses the apparatus in Figure 1.1 to investigate the electrolysis of sodium chloride. Figure 1.1 (a) Name the item of apparatus labelled A in Figure 1.1. [1] (b) State the general term used for the positive electrode, B, in Figure 1.1. [1] (c) Give one observation, other…

This question is about aluminium and other metallic elements. (a) Aluminium is extracted from purified bauxite by electrolysis. Fig. 3.1 shows a diagram of the electrolytic cell used. Fig. 3.1 > **(i)** State the name of the aluminium compound present in bauxite. [1] > > **(ii)**…

Which statement about hydrogen-oxygen fuel cells is correct? A Hydrogen is extracted from clean, dry air. B The only product is carbon dioxide. C The reaction is endothermic. D No toxic gases are produced.