Differentiate between metal and non-metal on the basis of their chemical properties.
Define the following terms.
$(i)$ Mineral $(ii)$ Ore $(iii)$ Gangue
Write equations for the reactions of
$(i)$ iron with steam
$(ii)$ calcium and potassium with water
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.
In the electrolytic refining of a metal $M$, what would you take as the anode, the cathode and the electrolyte ?