Question # 1

At the time of partition, How many industries wee present in Pakistan.

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30

32

34

40

Blonde hair contains compound of.

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Iron

Copper

titanium

Molybdenum

In the bessemerization process.

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Roasted ore is beated.

Molten matte is removed.

Molten matte is heated

Molten matte is added

The number of carbon atoms present in petroleum gas.

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1-2

1-3

1-4

1-5

Process of heating the concentrated ore to high temperature in excess of air is called.

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Roasting

Smelting

Bessemerization

All

the chemical formula of chalcopyrite is:

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Cu₂S

CuFe₂S

CuS

FeS

Blast furnace usually used for the metallurgy of.

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Iron

Copper

Aluminum

Both a and b

Compound of metal exist under earth crust are called.

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Ore

Gangue

Minral

None of these

In solvay's process slaked lime is used to:

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Prepare CO₂

Prepare quick lime

Recover ammonia

Form Na₂CO₃

A saturated solution of sodium chloride is called.

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Brine

Suspension

Colloidal

None of these

Chemical formula of matte will:

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Cu2S.FeS

Cu2S

Cu2O

FeS

Which one of the following is manufactured by Solvar's process:

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caustic soda

washing soda

urea

sulphuric acid

Composition of carbon in the diesel oil.

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C₇-C₁₀

C₁₀-C₁₂

C₁₃-C₁₅

C₁₅-C₁₈

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