Class VIII

Whose reactivity among the following metals ? 
  1. Copper 
  2. Potassium 
  3. Iron 
  4. Zinc 
Which non-metal is a good conductor of electricity?
  1. Phosphorus
  2. Sulphur
  3. Graphite
  4. Coal
The metal stored in kerosene due to its high reactivity with air and water is
  1. Magnesium
  2. Zinc
  3. Sodium
  4. Calcium
Metal oxides are of nature
  1. Acidic
  2. Basic
  3. Neutral
  4. All of these.
A metal which is found in liquid state at room temperature is ...
  1. Sodium
  2. Mercury
  3. Potassium
  4. Aluminium
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