SOME IMPORTANT FACTS(PART-IV)

1. When cream is separated from milk, its density increases.
2. For artificial respiration mixture of oxygen and helium gas cylinder is used.
3. In cold places, to decrease the freezing point ethylene glycol is used.
4. Hydrogen peroxide is used for oil paintings.
5. Sodium is kept in kerosene oil.
6. The heaviest element is osmium(Os).
7. The lightest element, least dense and most reductant is lithium(Li).
8. Flourine is the most oxidising agent.
9. Silver is the best conductor of electricity.
10. Radon is the heaviest gas.
11. Polonium has the maximum number of isotopes.
12. Sulphuric acid is known as oil of vitriol.