Question # 1

the chemical formula of chalcopyrite is:

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Cu₂S

CuFe₂S

CuS

FeS

In the bessemerization process.

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Roasted ore is beated.

Molten matte is removed.

Molten matte is heated

Molten matte is added

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Concentration of the copper ore is carried out by:

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Calcinations

Roasting

Forth flotation

Distillation

Formula of baking soda is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₂PO₄

Which one of the following is not faction of crude oil.

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Paraffin wax

Asphalt

Fuel oil

Petroleum coke

How many % age of nitrogen in urea fertilizers?

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40.6

45.6

46.6

50

Compound of metal exist under earth crust are called.

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Ore

Gangue

Minral

None of these

The impurities associated with the minerals are known as:

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Metallurgy

Ores

Gangue

Compounds

Froth flotation process is used to concentrate the ore on:

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Density basis

Concentration basis

Wetting basis

Magnetic basis

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

Chalco-pyite is an ore of:

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iron

aluminium

silver

copper

The nitrogen present in urea is used by plants to synthesize.

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Sugar

Proteins

Fats

DNA

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Chemistry 10th Class English Medium Unit 16 Online Test MCQs With Answers

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