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The metal that gives hydrogen gas upon treatment with both acid as well as base is :
zinc
iron
mercury
magnesium
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Oxidation states -
Transition elements have a variety of oxidation states but the common oxidation state is +2 for 3d metals.
-
zinc is the metal that gives hydrogen gas on reacting with both acid & base
(i)
(ii)
Option 1)
zinc
Option 2)
iron
Option 3)
mercury
Option 4)
magnesium