निम्नलिखित में धातुओ की ऑक्सीकरण संख्याएँ बताइये -
(a) `[Co(CN)(H_(2)O)(en)_(2)]^(2+)` (b) `[PtCl_(4)]^(2-)`
(c ) `[CrCl_(3)(NH_(3))_(3)]` (d) `[CoBr_(2)(en)_(2)]^(+)`
(e ) `K_(3)[Fe(CN)_(6)]`
(f) `[Cu(NH_(3))_(4)]SO_(4)`

Calculate EAN in [Cr(CN)_(6)]^(3-) (b) [PdXCI_(4)]^(2-) (c ) [Pt(NH_(3))_(4)]^(2+) (d) [Cu(CN)_(4)]^(3-) .

Calculate EAN in [Cr(CN)_(6)]^(3-) (b) [PdXCI_(4)]^(2-) (c ) [Pt(NH_(3))_(4)]^(2+) (d) [Cu(CN)_(4)]^(3-) .

Specify the oxidation numbers of metals in the following co-ordination entites : (a) [Co(H_(2)O)(CN)(en_(2))]^(2+) (b) [PtCI_(4)]^(2-) (c) [Cr(NH_(3))_(3)CI_(3)] (D) [CoBr_(2)(en)_(2)]^(+) (e) K_(3)[Fe(CN)_(6)] .

Which would exhibit ionisation isomerism (a) p[Co(NH_(3))_(6)][(C_(2)O_(4))_(3)] (b) [Co(NH_(3))_(5)Br]^(2+)SO_(4)^(2-) (c ) K_(3)[Fe(CN)_(6)] K_(3)[Fe(C_(2)O_(4))_(3)] .

Which would exhibit ionisation isomerism (a) [Co(NH_(3))_(6)][(C_(2)O_(4))_(3)] (b) [Co(NH_(3))_(5)Br]^(2+)SO_(4)^(2-) (c ) K_(3)[Fe(CN)_(6)] (d) K_(3)[Fe(C_(2)O_(4))_(3)] .

Find the total number of complexes / species which are paramagnetic. (a) [Co(NH_(3))_(6)]^(3+)," "(b) [Co(H_(2)O)_(6)]^(3+), (c ) [Cr(NH_(3))_(6)]^(2+)," "(d) [CoF_(6)]^(3-), (e ) K_(3)[PtCl_(3)(C_(2)H_(4))]," "(f) [Mn(NH_(3))_(6)]^(2+), (g) [Fe(NH_(3))_(6)]^(2+)," "(h) NO_(2), (i) ClO_(2)," "(j) [Pt(NH_(3))_(2)Cl_(2)

Draw the structures of optical isomers of: (i) [Cr(C_(2)O_(4))_(3)]^(3-) (ii) [PtCl_(2)(en)_(2)]^(2+) (iii) [Cr(NH_(3))_(2)Cl_(2)(en)]^(+)