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The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :
The process of improving the quality of rubber by heating it with sulphur is called
The process of removing calcium and magnesium from hard water is known as
The process which does not evolve CO2 in air is
The purest form of iron is
The purest form of water in nature is
The purest form of water is
The quality of petrol is expressed in terms of
The radioactive element that occurs abundantly in India and can be used in place of uranium in nuclear power plants is
The reaction which converts sugar solution into alcohol is an example of