Question # 1

Froth flotation process is used to concentrate.

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Copper ore

Iron ore

Chromium ore

Aluminum ore

Which one is not a characteristic of an acid:

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it turns red litmus blue

it reacts with base to form salt and water

Its aqueous solution conduct electric current

it has sour taste

Alkalis react with ammonium salt to liberate.

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SO₂

CO₂

NH₃

H₂

The percentage of potable water on earth is.

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2%

0.2%

0.02%

0.002%

Formula of Methyl alcohol

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CH₅-OH

CH₃-CH₂-OH

All of them

None of these

Lactic acid founds in:

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Citrus fruits

Sour milk

Rancid Butter

Apple

Temporary hardness of water is removed by adding.

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Ca(OH)₂

NaOH

KOH

CaSO₄

Concentration of copper are is carried out by process.

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Roasting

Forth floatation

Gravity sepration

Electrostatic separation

The ability of carbon atoms to form chains or ring called.

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Hydrogenation

Chlorination

Cantenation

Halogenation

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

Sodium zeolite is resin of:

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NaAl(SiO₃)₂

KAl(SiO₃)₂

LiAl(SiO₃)₂

RbAl(SiO₃)₂

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

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

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concentration

purification process

metallurgy

refining

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