What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water: Zinc, Iron, Magnesium, Sodium (b) Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why ? (c) Name one metal more reactive and another less reactive than hydrogen. (d) Name one metal which displaces copper from copper sulphate solution and one which does not. Name one metal which displaces silver from silver nitrate solution and one which does not.

• Reactivity series is the series of arrangement in a vertical column in decreasing order of their

Increasing order of reactivity : Iron< Zinc< Magnesium< Sodium

• Hydrogen is not a metal but it is placed in the reactivity series of metals due to the fact that like metals hydrogen also loses electrons and forms positive ions.
• Lead is more reactive than hydrogen and copper is less reactive than
• Zinc displaces copper from copper sulphate solution and mercury does not displaces copper from copper sulphate solution.
• Copper displaces silver from silver nitrate but gold does not do