Question # 1

The chemical used in Clark's method is:

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CaO

slaked lime(Ca(OH)s)

washing soda

sodium zeolite

On which bases froth floatation process take place?

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Density bases

Concentration basis

Watting basis

None of these

Water of crystallization is responsible for.

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Melting points of crystals2

Boiling point of crystal

Shape of crystal

Transition points of crystals

Chalco-pyite is an ore of:

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iron

aluminium

silver

copper

The depletion of which gas results in the death of aquatic life.

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Oxygen

Carbon di oxide

Boath of them

Nome of them

Wood contain the amount of carbon.

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70%

80%

60%

40%

Which gas is evolved when acids react with carbonates and bicarbonates?

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Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

Formula of soda ash is.

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Na₂CO₃

NaHCO₃

Na₂SO₄

Na₃PO₄

The % age of carbon in coke is

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60

70

90

98

Which process is responsible for ascending of water in roots:

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evaporation

transpiration

condensation

capillary action

In which of the following groups , oxygen is attached on both sides with carbon atoms.

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Ketone group

Ether group

Aldehyde group

Easter group

General formula of carbohydrates is.

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C_n(H₂O)₆

C_n(H₂O₂)₆

C_n(H₃O)₆

C_n(H₂O₃)₆

Which gas protects the Earth's surface from ultraviolet radiations?

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CO₂

CO

N₂

O₃

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