Given the standard reduction potentials
`E_(K^(+)//K)^(0) = - 2.93 V, E_(Ag^(+)//Ag)^(0) = + 0.80 V`,
`E_(Hg^(2+)//Hg)^(0) = + 0.79 V, E_(Mg^(2+)//Mg)^(0) = - 2.73 V`,
`E_(Cr^(3+)//Cr)^(0) = - 0.74 ` V,
Arrange these metals in their increasing order of reducing character.

Explanation

`Ag lt Hg lt Cr lt Mg lt K `.
Lesser the reduction potentials greater is their reducing character.