(a)[2]
Choose two processes that indicate a chemical change. Tick (✓) two boxes. boiling water burning methane dissolving salt mixing ink and water rusting of iron
(b)[1]
Hydrogen reacting with nitrogen is reversible. Write the symbol that represents a reversible reaction.
(c(i))[1]
State which experiment has the largest temperature change.
(c(ii))[1]
State which experiment is the most endothermic.
(c(iii))[2]
Complete the symbol equation by filling in the missing parts. $\text{Mg} + \dots\text{HCl} \rightarrow \text{MgCl}_2 + \dots$
(c(iv))[2]
Complete Fig. 7.1 by adding labels for the vertical axis, the reactants, and the products.