Answer in one word: 1. Which metal is liquid at room temperature other than mercury? [1] _______________________________________________________________  2. Which nonmetal is lustrous and shiny? [1] _______________________________________________________________  3. Which nonmetal is good conductor of Electricity? [1] _______________________________________________________________  4. Which Metals can be cut with Knife? [1] _______________________________________________________________  5. Which Metals have very low melting and boiling point? [1] _______________________________________________________________ _______________________________________________________________ 6. Which nonmetal is liquid at room temperature? [1] _______________________________________________________________7. Which is the hardest element known to mankind [1] _______________________________________________________________ 8.  Sodium and Potassium are usually kept in which solvent? [1] _______________________________________________________________ 9. Some elements show property of both metals and non-metals [1] _______________________________________________________________ 10. The damage caused to metals due to the reaction of metals with oxygen, moisture, carbon dioxide etc. [1] _______________________________________________________________ 11. A pencil lead is made up of Non-Metal called [1]