STATEMENT-1: `Co(NH_(3))_(6)^(+3)` is more stable than `(Co(en)_(2)(NH_(3))_(2))^(+3)`
and
STATEMENT-2: Chelation is more in `[Co(en)_(2)(NH_(3))_(2)]^(+3)` than `[Co(NH_(3))_(6)]^(+3)`

The total number of unpaired electrons present in [Co(NH_(3))_(6)]Cl_(2) and [Co(NH_(3))_(6)]Cl_(3) is

No. of isomers of [Co(NH_(3))_(2)Cl_(2)(en)]^(+) are

Describe a simple test to distinguish between the following pairs of compounds (i) (A) [Co(NH_(3))_(5)Br]SO_(4) and (B) [Co(NH_(3))_(5)SO_(4)]Br (ii) (A) [Cr(H_(2)O)_(6)]CI_(3) and (B) [Cr (H_(2)O)_(5)CI] CI_(2)H_(2)O (iii) (A) cis [PtCI_(2)(NH_(3))_(2)] and (B) trans [Pt CI_(2)(NH_(3))_(2)] (iv) (A) and (B) Two enantiomers of [Co(en)_(2)(NH_(3))_(2)] (V) (A) (A) [Cr (NH_(3))_(6)][Cr(NH_(3))_(2)(NO_(2))_(4)] (vi) (A) [Pt(NH_(3))_(2)CI_(2)] and (B) [Pt(NH_(3))_(6)]CI_(2) (vii) (A) [Co(NH_(3))_(5)CI]SO_(4) and (B) [Co(NH_(3))_(5)SO_(4)]CI .

The oxidation number of Co in [Co(NH_(3))_(3)(NO_(2))_(3)] is

Which of the following complexes is more stable and why ? [Co(en)_3]^(3+) and [Co(NH_3)_6]^(3+)