Which has got smallest size `Fe,Fe^(+2)&Fe^(3+)` ?

Which one has the larger size : Fe^(2+) " or " Fe^(3+) ?

For which of the following pairs, indicate which of the two species is of large size : Fe^(2+) or Fe^(3+) b. Mg^(2+) or Ca^(2+)

Given the standard oxidation potential Fe overset(+0.4V) to Fe^(2+) (aq) overset(-0.8 V) to Fe^(3+) (aq) , Fe overset(+0.9V) to Fe(OH)_2 overset(0.6V) to Fe(OH)_3 It is easier to oxidize Fe^(2+) to Fe^(3+) in :

Which will be the most stble among Cu^(+) , Fe^(+) Fe^(2+) and Fe^(3+) .

Which of the following is used to oxidise Fe^(+2) to Fe^(+3) in III group

Which of the following order is correct for the size of Fe^(3+) , Fe and Fe^(2+) ?