(a(i))[1]
Determine the reaction rate at 40 ^{\circ}C.
(a(ii))[2]
The experiments were repeated with small lumps of zinc rather than zinc powder. Keep every other condition unchanged. On the grid, plot a graph to show how the rate of reaction varies with temperature when small lumps of zinc are used instead of zinc powder.
(b(i))[1]
How does lowering the concentration of a reactant affect the rate of a chemical reaction?
(b(ii))[1]
What effect does adding a catalyst have on the rate of a chemical reaction?
(c)[2]
Zinc and iron are both metals. State two physical properties characteristic of metals.
(d(i))[1]
Stainless steel is an alloy of iron. How is the term alloy defined?
(d(ii))[1]
State one common use for stainless steel.