Chemical Process
Which of the following processes can remove both temporary as well as permanent hardness of water?

Filtration
None of these
Distillation
Boiling

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Chemical Process
Pasteurisation of milk means

Inhibiting the growth of micro-organisms without killing them
Removal of fatty and albuminous substance from it
None of these
Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics

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Chemical Process
Pick out the wrong statement. Iodine value of an oil or fat is

The number of grams of iodine taken up by 100 gm of oil or fat
A measure of its unsaturation
Helpful in findings its adulteration & its suitability for making soap
Independent of the type of oil, whether it is drying or non-drying

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Chemical Process
Presence of carbonaceous matter in the sewage

Reduces sulphate ions to sulphides causing obnoxious smell
Increases the quantity of chlorine used for its purification
Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
All of these

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