Write word equations and then balanced equations for the reaction taking place when -
$(a)$ dilute sulphuric acid reacts with zinc granules.
$(b)$ dilute hydrochloric acid reacts with magnesium ribbon.
$(a)$ Sulphuric acid $+$ Zinc $\rightarrow$ zinc sulphate $+$ Hydrogen
${{H}_{2}}S{{O}_{4(aq)}}\,+Z{{n}_{(s)}}\to ZnS{{O}_{4(aq)}}\,+\,{{H}_{2(g)}}$
$(b)$ Hydrochloric acid $+$ Magnesium $\rightarrow$ Magnesium chloride $+$ Hydrogen
$2HC{{l}_{(aq)}}+M{{g}_{(s)}}\to MgC{{l}_{2(aq)}}+{{H}_{2(g)}}$
You have been provided with three test tubes. One of them contains distilled water and the other two contaln an acidic solution and a basic solution, respectlvely. If you are glven only red litmus paper. how will you identify the contents of each test tube ?
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Write an equation to show the reaction between Plaster of Paris and water.