Available Answers

1. 1.

   Fill in the blanks.

   1. _______________ is a reactive non-metal which catches fire in air.
   2. _______________ and _______________ are soft metals which can be cut with a knife or a blade.
   3. Melting point of most of the metals is _______________ than non-metals.
   4. The property by the virtue of which the metals can be beaten into thin sheets is called _______________.
   5. _______________ is the hardest known non-metal.
2. 2.

   Tick (√) the correct option.

   1. Which of the following is the most reactive metal?
      1. Gold
      2. Copper
      3. Sodium
      4. Iron
   2. Non-metals reacts with oxygen to form
      1. acidic oxide
      2. basic oxide
      3. both acidic and basic oxides
      4. no oxide is formed
   3. Which of the following is not a property of metals?
      1. High melting and boiling points
      2. Bad conductor of heat
      3. Can be drawn into wires
      4. Solid in room temperature
   4. Which of these metals can replace all the other three metals from their salt solutions?
      1. Iron
      2. Zinc
      3. Copper
      4. Silver
   5. The products formed when zinc reacts with sulphuric acid are
      1. zinc sulphate and water
      2. zinc sulphate and hydrogen
      3. zinc oxide and water
      4. zinc oxide and Hydrogen
3. 3.

   Write one word for the following.

   1. Non-metal with metallic lustre
   2. Metal that can be cut with a knife
   3. Non-metal which is very hard
   4. Non-metal which is a conductor of electricity
   5. Metal that is stored in kerosene
4. 4.

   Match the columns.

   COLUMN A	COLUMN B
   1.  Aluminium	a. Dry cells
   2. Iron	b. Electrodes
   3. Graphite	c. Body parts of an aircraft
   4. Zinc	d. Malleable
   5. Gold	e. Matchboxes
   6. Silver	f. Exist in free state
   7. Copper	g.  Jewellery
   8. Phosphorus	h. Cooking utensils

    

5. 5.

   Name a metal which is liquid at room temperature.

6. 6.

   What are basic oxides? Give two examples.