The main buffer system of the human blood is
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1) The hottest part of the gas flame is known as
2) The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
3) The iron ore magnetite consists of
4) The metal does not give H2 on treatment with dilute HCL is
5) The metal that is used as a catalyst in the hydrogenation of oils is