An liquid compound `X` of molecular mass `18` u can be obtained from a number of natural sources. All the animals and plants need liquid `X` for their survival. When an electric current is passed through `200` grams of pure liquid `X` under suitable conditions, then `178` grams of gas `Y` and `22` grams of gas `Z` are produced. Gas `Y` is produced at the positive electrode whereas gas `Z` is obtained at the negative electrode. Moreover, gas `Y` supports combustion whereas gas `Z` burns itself causing explosions.
(a) Name (i) liquid `X` (ii) gas, `Y` and (iii) gas `Z`.
(b) What is the ratio of the mass of element `Z` to mass of element `Y` in the liquid `X` ?
(c) Which law of chemical combination is illustrated by this example ?
(d) Name two source of liquid `X`.
(e) State an important use of `Y` in our life.