(a)[5]
Describe how aqueous sodium hydroxide reacts with: • a named acid • ammonium salts • a named indicator.
(b)[1]
Which of the following pH values could match the pH of aqueous ammonia? pH 1 pH 5 pH 7 pH 10
(c)[2]
Which two of these compounds occur in fertilisers? Tick two boxes. copper(II) oxide potassium chloride sodium phosphate strontium fluoride sulfur dioxide
(d(i))[1]
State one further source of oxides of nitrogen in the atmosphere.
(d(ii))[1]
State one health effect of oxides of nitrogen.
(d(iii))[1]
Give the name of one further greenhouse gas that makes a major contribution to climate change.