Question

A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser.

(a) What are X, Y and Z ?

(b) To which group of periodic table does X belong ?

(c) Name the period of periodic table in which X is placed.

(d) Which element is placed just before X in the period ?

(e) Which element is placed just after X in the period ?

Answer 1

(a) X is nitrogen gas, N₂ ;

Y is ammonia gas, NH₃

and Z is ammonium sulphate, (NH ) SO₄.

(b) 15 th group .

(c) 2 nd period.

(d) Carbon, C .

(e) Oxygen, O.