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0.94
0.03
78.03
85.02
The percentage of nitrogen present in ammonium sulphate is:
The percentage of oxygen in air is approximately
The pH of human blood is between:
The pH of lemon juice is expected to be
The pollutant responsible for ozone holes is _
The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :
The polymer used in making plastic crockery is
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