Question # 1

Concentration of copper are is carried out by process.

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Roasting

Forth floatation

Gravity sepration

Electrostatic separation

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

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

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concentration

purification process

metallurgy

refining

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

Which one of the following is manufactured by Solvar's process:

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caustic soda

washing soda

urea

sulphuric acid

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

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Metallurgy

Non metal

Metalloid

Alloy

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

Formula of soda ash is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₃PO₄

Formula of baking soda is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₂PO₄

Manufacturing of urea involves:

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2 steps

3 steps

4 steps

5 steps

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

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Sugar

Proteins

Fats

DNA

Sodium carbonate is manufactured by.

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Haber's process

Ostwald's process

Solvay's process

All

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