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Chemistry

Chemistry
Of the following compounds of calcium, the one having highest covalent character is

Cal2
Cacl2
CaBr2
CaF2

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Chemistry
In drinking water supply, which of the following treatments is not involved

Coagulation
Softening
Sedimentation
Disinfection

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Chemistry
Of the following, which one pollutes the air of a big city ?

Chromium
Lead
Copper
Cadmium

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Chemistry
Synthetic detergents are made from

Sodium salt of benzene sulphonic acid
Sodium stearate
Sodium palmitate
Sodium salt of benzene carboxylic acid

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Chemistry
Quartz is made of

Sodium Sulphate
Sodium Silicate
Calcium Sulphate
Calcium Silicate

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Chemistry
The molecular mass of a gas is

Twice its vapour pressure
Half its vapour pressure
Not related to its vapour pressure
Equal to its vapour pressure

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