(i) Under what conditions iron reacts with water?

(ii) Give the balanced equation of the reaction.

(iii) What is noticed if the products are not allowed to escape?

From the knowledge of activity series, name a metal which shows the following properties:

(i) It reacts readily with cold water

(ii) It displaces hydrogen from hot water

(iii) It displaces hydrogen from dilute HCl

(iv) It forms a base which is insoluble in water.

Hydrogen can be prepared with the metal zinc by using

(i) acid

(ii) alkali

(iii) water

Give an equation in each case.

For laboratory preparation of hydrogen, give the following

(a) materials used

(b) method of collection

(c) chemical equation

(d) fully labelled diagram.