(i) What causes the violence associated with torrential rain?

(ii) Which property of water enables it to modify the climate?

(iii) Explain why distilled water tastes flat.

Give a balanced chemical equation for the following:

(i) Laboratory preparation of hydrogen.

(ii) Preparation of hydrogen from an alkali.

Name any two impurities present in the hydrogen gas prepared in the laboratory. Also name the chemical used to remove any one impurity that you have stated.

Draw the shell diagram for the formation of bond between Hydrogen and Nitrogen. Name the compound formed.