Question # 1

A saturated solution of sodium chloride is called.

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Brine

Suspension

Colloidal

None of these

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

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Roasting

Smelting

Bessemerization

All

Formula of baking soda is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₂PO₄

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

Chemical formula of copper glance is:

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Cu2O

Cu2S

CuFeS2

CuSO4

In smelting process a small amount of coke is required because:

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it is highly endothermic process

it is highly exothermic process

it is very fast process

it is very slow process

How many units are in Pakistan for manufacturing of Urea.

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3

6

9

12

The impurities associated with the minerals are known as:

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Metallurgy

Ores

Gangue

Compounds

Petroleum fraction having composition C₅ to C₇ is.

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Petroleum Gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

In forth flotation process the ore particles are preferentially wetted by:

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water

oil

benzene

petrole

the chemical formula of chalcopyrite is:

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Cu₂S

CuFe₂S

CuS

FeS

Manufacturing of urea involves:

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2 steps

3 steps

4 steps

5 steps

When NaHCO₃ is heated it forms.

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CO₂

Ca(OH)₂

CaCO₃

CaO

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