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Chemical Process

Chemical Process
Argon is the third largest constituent of air (followed by N₂ & O₂). Its percentage by volume in air is

0.34
0.14
1.4
0.94

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Chemical Process
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

Water treatment
Car battery solution
Fertiliser manufacture
Synthesis of oleum

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Chemical Process
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

Reduce the variation in its viscosity with temperature
Reduce its viscosity
Increase the variation in its viscosity with temperature
Increase its viscosity

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Chemical Process
Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by

Iron-steam reaction
Electrolysis of water
Steam reforming of naphtha
Its cryogenic separation from coke oven gas

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Chemical Process
Concentration of sulphide ores is done usually by

Smelting
Froth floatation
Roasting
Electro magnetic separation

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Chemical Process
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

Sodium silicate
Caustic soda
Sodium tripolyphosphate (STPP)
Sodium borate

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