How would you account for the following:
(i) Of the `d^(4)` species, `Cr^(2+)` is strongly reducing while manganese(III) is strongly oxidising.
(ii) Cobalt(II) is stable in aqueous solution but in the presence of complexing reagents it is easily oxidised.
(iii) The `d^(1)` configuration is very unstable in ions.

How would you account for the Cobalt (II) is stable in aqueous solution but in the presence of complexing reagents is easily oxidised.

How would you account for the of the d_(4) species, Cr^(2+) is strongly reducing while manganese (III) is strongly oxidising.

How would you account for the The d_(1) configuration is very unstable in ions.

Identify the correct statement from the following . (i) Eu^(2+) and Yb_(2+) are reducing agents . (ii)The electronic configuration of Pr ^(3+) "is" [Xe]4int^(3) (iii) Aqueous solution of LaCl_(3) is colourless.

Among the properties (i) reducing (ii) oxidising (iii) complexing the set of properties shown by CN - ion towards metal species is :

How will you convert ethanal into the following compounds? (i) Butane-1,3-diol (ii) But-2-enal (iii) But-2-enoic acid

The following statements about electro chemical series are i) the metals occupying top positions in the series do not liberate hydrogen with dilute acids ii) the substances which are stronger reducing agents and stronger oxidising agents are placed below & top respectively iii) a metal higher in the series will displace the metal from its solution which is lower in the series iv) various electrodes are arranged in a series in the descending order of their potentials The correct statements are The correct statements are

Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge ? (i) 2s and 3s (ii) 4d and 4f (iii) 3d and 3p

Identify the incorrect statements from the following. I. Tin in +2 state acts as reducing agent while lead in +4 state acts as strong oxidising agent. II. Silicon exists as both [SiF_(6)]^(2-) and [SiCl_(6)]^(2-) forms. III. The hybridisation of carbon in fullerence is sp^(3) IV. Among Ge, Sn and Pb lowest melting point is for Sn.