Question # 1

Chalco-pyite is an ore of:

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iron

aluminium

silver

copper

Concentration of copper are is carried out by process.

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Roasting

Forth floatation

Gravity sepration

Electrostatic separation

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

When CO₂ is passed through the ammonical brine the only salt that precipitates is:

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NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

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

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caustic soda

washing soda

urea

sulphuric acid

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

The process of removal of gangue form the ore is technically known as:

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concentration

purification process

metallurgy

refining

A saturated solution of sodium chloride is called.

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Brine

Suspension

Colloidal

None of these

When NaHCO₃ is heated it forms.

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CO₂

Ca(OH)₂

CaCO₃

CaO

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

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30

32

34

40

The impurities associated with the minerals are known as:

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Metallurgy

Ores

Gangue

Compounds

Concentration is a separating technique in which mineral is separated from.

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Gangue

Silicates

Aluminates

All

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