Question # 1

On which bases froth floatation process take place?

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Density bases

Concentration basis

Watting basis

None of these

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

Which one is not the fraction of residual oil?

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Paraffin wax

Asphalt

Fuel oil

Coke

The process of removal of gangue form the ore is technically known as:

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concentration

purification process

metallurgy

refining

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

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NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

Ammonia is prepared by:

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Solvay's process

Haber's process

Floatation process

Bayer's process

How many % age of nitrogen in urea fertilizers?

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40.6

45.6

46.6

50

When NaHCO₃ is heated it forms.

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CO₂

Ca(OH)₂

CaCO₃

CaO

Brown hair contains.

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Iron compound

Copper compound

titanium compound

Both a and b

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