identification of ions and gases

State a chemical test for water． test：______ observations：______

（i）A few drops of aqueous sodium hydroxide were added to the first portion of solution $$\mathbf{A}$$．[2] observations：______ （ii）An excess of aqueous sodium hydroxide was then added to this mixture． observations：______

（i）A few drops of aqueous ammonia were added to the second portion of solution $$\mathbf{A}$$． observations：______ （ii）An excess of aqueous ammonia was then added to this mixture． observations：______

Aluminium foil and aqueous sodium hydroxide were added to the third portion of solution $$\mathbf{A}$$． The mixture was heated and the gas produced was tested with litmus paper． observations：______ ：______

tests on solid $$\mathbf{B}$$ Some of the tests and observations are shown． $$ \begin{array}{|l|c|} \hline {\text { tests on solid B }} & \text { observations } \\ \hline \text { test 1 } & \\ \text { A flame test was done on solid B. } & \text { red flame } \\ \hline \text { test 2 } & \\ \text { Solid B was dissolved in water. } & \text { yellow precipitate formed } \\ \begin{array}{l} \text { Dilute nitric acid and aqueous silver nitrate were } \\ \text { added to the solution. } \end{array} & \\ \hline \end{array} $$ Identify solid $$\mathbf{B}$$．