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Common Chemical Industries in Pakistan - 12
1.
(NH
4
)
2
HPO
4
contain 16% nitrogen and 48% P
2
O
5
.
a) True
b) False
2.
Pakistan in non-essentially an agricultural country.
a) True
b) False
3.
Fertilizers are very important building material.
a) False
b) True
4.
In Pakistan most of the cement factories are using wet process.
a) False
b) True
5.
In drying zone clay is broken in Al
2
O
3
, SiO
2
and Fe
2
O
3
.
a) False
b) True
6.
The use of cement in the construction of building is based on its property of colour change.
a) False
b) True
7.
The formula of calcium sulpho-aluminate is 3C.a-Al
2
O
3
3CaSO
4
.2H
2
O
a) True
b) False
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