Question

Q12. 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. Which element is placed just after X in the period ? A Oxygen B Nitrogen C Carbon D Boron
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Answer 1

Answer:

(a) X is nitrogen gas (N

2

). Y is ammonia gas (NH

3

) and Z is ammonium sulphate ((NH

4

)

2

SO

4

)

Reaction: N

2

+3H

2

Fe−calatyst

2NH

3

Reaction: 2NH

3

+H

2

SO

4

→(NH

4

)

2

SO

4

(b) X belongs to the 15th group.

(C) X belongs to the 2nd period.

(d) Carbon (C) is placed just before X in the period.

(e) Oxygen (O) is placed just after X in the period.