Below hydrogen in the reactivity series Above carbon in the reactivity series Above sodium in the reactivity series Below gold in the reactivity series
To make rust To make hydrogen To make oil To make water
Iron oxide only Iron oxide + water Iron oxide + hydrogen Iron hydroxide only
No reaction Magnesium hydrate + water Magnesium chloride + hydrogen Magnesium oxide only
Copper hydroxide + oxygen Copper hydrate only Copper chloride + oxygen No reaction
Thermal decomposition Displacement Neutralisation Combustion
Gaining weight Losing weight Gaining electrons Losing electrons