31.(.i) Define reactivity series of metals. Arrange the metals lead, calcium, gold and magnesium in order of their increasing reactivity.
Why are ionic compounds usually hard?
Write chemical equations that shows aluminium oxide reacts with acid as well as base.
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The arrangement of metals in a vertical column in the order of decreasing reactivities is called reactivity series. The reactivity series follows the order:
K>Na>Ca>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>
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