AI - atom
AI3+ ion
nitrogen isotope
none of these
The percentage of carbon in cost iron is:
The percentage of Nitrogen in Air is
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 :
