State the following pertaining to the physical properties of hydrogen :

(a) Colour & odour

(b) Solubility in water

(c) Effect on moist blue litmus paper.

Draw labeled diagrams for two experiments to prove that - hydrogen is lighter than air.

Using a burning candle and a jar of hydrogen - how would you prove experimentally that

(a) Hydrogen is a combustible gas

(b) Hydrogen does not support combustion.

State a reason why, when hydrogen is passed over heated copper oxide, the resultant product formed, differs in colour from the original reactant.