What would you observe when zinc is added to a solution of iron $(II) $ sulphate ? Write the chemical reaction that takes place.
Zinc is more reactive than iron. Therefore, if zinc is added to a solution of iron $II$ sulphate, then it would displace iron from the solution.
$\text{Z}{{\text{n}}_{(s)}}\,+\,FeS{{O}_{4(aq)}}\,\to \,ZnS{{O}_{4(aq)}}\,+\,F{{e}_{(s)}}$
Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute $H_2SO_4$.
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
In the electrolytic refining of a metal $M$, what would you take as the anode, the cathode and the electrolyte ?
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below.
$(a)$ What will be the action of gas on
$(i)$ dry litmus paper ?
$(ii)$ moist litmus paper ?
$(b)$ Write a balanced chemical equation for the reaction taking place.
Write equations for the reactions of
$(i)$ iron with steam
$(ii)$ calcium and potassium with water