Question # 1

The elements that do not conduct heat and electricity are called.

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Metallurgy

Non metal

Metalloid

Alloy

Bister copper is pure about;

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70%

80%

90%

98%

The number of carbon atoms present in petroleum ether.

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1-5

2-5

3-7

5-7

Concentration of the copper ore is carried out by:

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Calcinations

Roasting

Forth flotation

Distillation

Ammonical brine is prepared by dissolving ammonia gas in.

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NaCl

CaCO₃

CaCl₂

Na₂SO₄

Which one of the following organic compound is found is gasoline?

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C₂H₄

C₃H₈

C₇H₁₀

C₁₂H₂₆

Chemical formula of matte will:

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Cu2S.FeS

Cu2S

Cu2O

FeS

Brown hair contains.

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Iron compound

Copper compound

titanium compound

Both a and b

Ammonia is prepared by the process .

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Ostwald

Haber

Clark

All

The number of carbon atoms present in petroleum gas.

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1-2

1-3

1-4

1-5

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

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Gangue

Silicates

Aluminates

All

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

Concentration of copper are is carried out by process.

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Roasting

Forth floatation

Gravity sepration

Electrostatic separation

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