Class VIII

The metal stored in kerosene due to its high reactivity with air and water is
  1. Magnesium
  2. Zinc
  3. Sodium
  4. Calcium
Materials having the properties of both metals and non metals are called _ . 
  1. Metalloids 
  2. Noble metals 
  3. Alloys 
  4. Mixtures 
Whose reactivity is highest among the following metals?
  1. Copper
  2. Potassium
  3. Iron
  4. Zinc
Steel is an alloy of :
  1. Iron and tin
  2. Iron and copper
  3. Iron and carbon
  4. Iron and bronze
The non-metal which is liquid at room temperature is:
  1. Carbon
  2. Iodine
  3. Bromine
  4. Chlorine.
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