Coordination CompoundHard

Question

Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other, in

Options

A.Ti+ ,Ti3+
B.Cu+, Cu2+
C.Cr2+, Cr3+
D.V2+, V3+

Solution

As we move down in groups 13, 14and 15, increass of s2 electrons of valence shell increases (inertpair effect). Thus in metals present at the bottom of nthe groups 13, 14 and 15 lower oxidation state becomes more important, viz. Pb (+2 state rather +4), Bi (+3 state rather +5) and Ti (+1 rather than +3)

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