TEST YOUR KNOWLEDGEA Very Short Answer Questions (Answer in a word or

TEST YOUR KNOWLEDGEA Very Short Answer Questions (Answer in a word or a sentence):1. Name two metals which exist in the free state.2. Name the most abundant non-metals in :(i) the universe(ii) earth's crust3. Out of copper and zinc which metal evolves hydrogen gas on reacting with dilute hydro-chloric acid ?4. Name an alloy of aluminium used in construction of aircrafts.5. Which non-metal has very high melting and boiling points ?6. State two conditions necessary for rusting of iron.It7. What is the difference between physical state of metals and non-metals at room temperature?8. Why are electric wires made of copper or aluminium ?9. Metal X' dipped in a salt solution of Y, displaces 'Y' from the solution. Which is morereactive X or Y?10. Name a non-metal which is used in making electrodes in dry cells.me1s

Answer»

Answer:

1. gold,COPPER,SILVER and most metals

2.(ii) The earth'crust

4. alloy of zinc , copper and magnesium.

5. Tungsten

6. Oxygen(O2) and water(H2O)