Which among the following elements is found in maximum percentage in the human body ?
1). Carbon
2). Hydrogen
3). Nitrogen
4). Oxygen
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1. The most important ore of aluminium is
2. The chemical bahaviour of an atom depends upon
3. The two metal ions that cause hardness to water are:
5. The main buffer system of the human blood is
6. In nuclear raeactors the speed of neutrons is slowed down by -
7. Question 13.15:What effect does branching of an alkane chain has on its boiling point?
8. Muddy water is treated with alum in purification process, it is termed as.