Hydrogen can be prepared by the action of dil.H_2SO_4 on

1.	Hydrogen can be prepared by the action of dil.H_2SO_4 on
Answer» Copper Iron Lead Mercury Solution :Hydrogen cannot be prepared by the action of dil. `H_2SO_4` on copper or mercury as these TWO metals cannot DISPLACE hydrogen from ACIDS. Action of dil. `H_2SO_4` on Pb stops after sometime due to the FORMATION of insoluble `PbSO_4`. Only iron reacts RAPIDLY with dil. `H_2SO_4` to give `H_2`.

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