A student conduct a number of test on an aqueous solution of compound x. some of the inference are record in table 2.complete by filling in the missing observations and Test ObservationInferences

To 1ML of a solution of x is added a few copper turnings ,followed by concentrate sulphuric acidBrown gas evolves which turns moist blue litmus paper

To 1ML of a solution X dilite nitric acid followed by aqueous silver nitrate. Aqueous ammonia is then added until in excess I-

To 1ml of a solution x is added lead nitrate solutionIonic equation required