Chemical Process
Which of the following is a constituent of vinegar?

Around 1% acetic acid
Around 10% alcohol
Neither A nor B
Both A and B

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Chemical Process
Presence of carbonaceous matter in the sewage

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

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Chemical Process
Reverse osmosis is normally used for the

Purification of oxygen
Desalination of brackish water to produce potable (drinking) water
Separation of isotopes of uranium from gaseous uranium hexaflouride
Separation of helium from natural gas

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