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 ?

Lakhmir Singh Chemistry Class 10

Answer 1

X is nitrogen gas
Y is ammonia
nitrogen is placed in 2nd period
before nitrogen there is carbon
after is oxygen
nitrogen belongs to 15th group

Answer 2

(a) X - Nitrogen, Y - Ammonia, Z - Dizanium sulphate ---- (NH4)2SO4
(b) Group 15
(c) period 2
(d) Carbon ( atomic no. 6)
(e) oxygen (atomic no. 8)





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