Question # 1

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

Sodium carbonate is manufactured by.

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Haber's process

Ostwald's process

Solvay's process

All

Blonde hair contains compounds of:

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molybdenum

iron

titanium

copper

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

Ammonia is prepared by:

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Solvay's process

Haber's process

Floatation process

Bayer's process

Which contains sufficient amount of metal?

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Mineral

Ores

Rocks

Soil

The process of roasting during metallurgy of copper is carried out in a special furnace called.

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Blast furnace

Fire furnace

Bessemer converter

Reverberatory furnace

Petroleum fraction having composition C₇to C₁₀IS called

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Petroleum gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

The impurities associated with the minerals are known as:

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Metallurgy

Ores

Gangue

Compounds

The raw materials for the manufacturing of urea are.

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Ammonia

Carbondioxide

Limestone

a & b

Froth flotation process is used to concentrate the ore on:

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Density basis

Concentration basis

Wetting basis

Magnetic basis

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

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NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

The number of carbon atoms present in gasoline or petrol.

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5-10

6-10

7-10

8-10

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