The order of increasing strength as reducing agent is Hg < Sn < Fe.
Standard reduction potential is defined as the reducing power of any element or compound
The standard reduction potential of Hg is 0.91V
The standard reduction potential of Fe is -0.45V.
The standard reduction potential of Sn is -0.14V.
The species or compound which oxidize itself and reduce other species or compound by loosing electron is termed as reducing agent.
As we know that, with the increase in the standard reduction potential, the oxidizing power of particular species increase.
The increasing order of standard reduction potential is Hg > Sn > Fe.
Thus, the increasing strength as reducing agent is Hg < Sn < Fe.
learn more about standard reduction potential:
https://brainly.com/question/23881200
#SPJ4
