Important Facts about Some Metals (PART-IV)

1. Green color is due to the presence of Barium in Fireworks.
2. Barium hydroxide is known as Baryta water.
3. Osmium is the heaviest metal and the platinum is the hardest.
4. Zinc oxide is known as flower of zinc. It is also known as chinese white and used as white paint.
5. Silver chloride is used in photochromatic glass.
6. Silver iodide is used in artificial rain.
7. Silver nitrate is used as marker during election. It is kept in coloured bottle to avoid decomposition.
8. Silver spoon is not used in egg food because it forms black silver sulphide.
9. To harden the gold, copper is mixed, pure gold is 24 carat.
10. Iron pyrites is known as fool's gold.