Which of the following order of ions is correct for increasing strength as a reducing agent?
(a) Cr2+ (b) Cr3+ (c) Cr2O72-
Answer & explanation
Correct answer: option 1
(c) < (b) < (a)
Cr2O72- < Cr3+ < Cr2+
Smaller the oxidation state of the element in the ion, greater is the reducing nature.