Question # 1

Which one of the not metal.

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Copper

Carbon

chromium

Iron

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

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Gangue

Silicates

Aluminates

All

Imperial chemical industries was established in.

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1942

1944

1950

1990

Ammonical brine is prepared by dissolving ammonia gas in.

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NaCl

CaCO₃

CaCl₂

Na₂SO₄

Concentration of copper are is carried out by process.

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Roasting

Forth floatation

Gravity sepration

Electrostatic separation

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

Brown hair contains.

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Iron compound

Copper compound

titanium compound

Both a and b

When NaHCO₃is heated if forms:

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CO₂

Ca(OH)₂

CaCO₃

CaO

When NaHCO₃ is heated it forms.

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CO₂

Ca(OH)₂

CaCO₃

CaO

How many % age of nitrogen present in air by volume?

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70%

75%

78%

80%

Ammonia is prepared by the process .

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Ostwald

Haber

Clark

All

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

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Metallurgy

Non metal

Metalloid

Alloy

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