(a)[2]
Aqueous ammonia is added to the first portion of solution A first dropwise and then in excess. observations when added dropwise ________ observations in excess ________
(b(i))[1]
The second portion of solution A is treated with excess aqueous sodium hydroxide. observations ________
(b(ii))[1]
observations to record ________
(b(iii))[1]
Identify the gas released in (b)(ii).
(c)[1]
The third portion of solution A is treated with about 1 cm^{3} of dilute nitric acid, followed by a few drops of aqueous barium nitrate. observations ________
(d)[1]
Identify the gas released in test 2.
(e)[2]
Identify solid B.