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Chemistry Class 12 Chapter 15
Common Chemical Industries in Pakistan
Test 10
1.
Non woody materials are?
Bamboo
All of these
Corn straws
Wheat straws
2.
Potassium fertilizer are especially useful for?
All of these
Potato
Tobacco
Coffee
3.
Woody materials are?
Eucalyptus
Poplar
All of these
Douglas fur
4.
The composition mixture of clay and lime stone in a raw material is?
None of these
25% lime stone and 75% clay
75% lime stone and 25% clay
15% limestone and 65% clay
5.
Which three elements are needed fr the healthy growth of plants?
N,P,K
N,K,C
N,S,K
N,L,C
6.
Fine powder gypsum is mixed with clinker up to?
6%
3%
5%
4%
7.
Method for manufacturing cement?
Dry process
Both a and b
None of these
Wet process
8.
Composition of silica in cement?
62%
22%
3%
1.5%
9.
NSSC involves following manufacturing steps?
Cutting of raw materials
Wet cleaning
Dry cleaning
All of these
10.
Stock preparation of plants?
Addition of chemical additive and recycle fibers
All of these
Dispersion of pulp
Mechanical refining
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