1.

(a) Account for the following : (i) Cu^(+) is unstable in an aqueous solution. (ii) Transition metals form complex compounds. (b) Complete the following equation: Cr_(2)O_(7)^(2-)+8H^(+)+3NO_(2)^(-)rarr

Answer»

SOLUTION :(ii) Becuase of smaller size of their METAL ions. Their high ionic charges. Vacand d-orbital so that these orbitals can accept lone pairs of e-donated byligonads and form coordinate bond.
(B) `Cr_(2)O_(7)^(2-)+8H^(+)+3NO_(2)^(-)rarr3NO_(3)^(-)+2Cr_(3)^(+)+4H_(2)O`


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