1.

Which option is not matched in correct sequence

Answer»

`d^(5), d^(3), d^(1), d^(4) RARR" increasing magnetic moment"`
`Mo, M_(2)O_(3), MO_(2), M_(2)O_(5)rarr" decreasing basic STRENGTH"`
`Sc, V, Cr, Mn rarr" increasing number of oxidation state"`
`Co^(2+), Fe^(+3), Cr^(+3), Sc^(+3)rarr" increasing stability"`

Answer :A


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