Among (i) `[Cr(en)_(3)]^(3+)`, (ii) trans - `[Cr(en)_(2)Cl_(2)]^(+)`, (iii) Cis - `[Cr(en)_(2)Cl_(2)]^(+)` (iv) `[Co(NH_(3))_(4)Cl_(2)]^(+)` the optically active complexes are

Among (i) [Co(NH_(3))_(6)]Cl_(3), (ii) [Ni(NH_(3))_(6)]Cl_(2), (iii) [Cr(H_(2)O)_(6)]Cl_(3), (iv) [Fe(H_(2)O)_(6)]Cl_(2) the complex which is diamagnetic is

Which of the following compounds show optical isomerism ? (i) Cis-[Co(NH_3)_4Cl_2]^+ (ii) Trans-[Co(en)_2Cl_2]^+ (iii) Cis-[Co(en)_2Cl_2]^+ (iv) [Co(en)_3]^(3+) Choose the correct answer codes given below.

Which of the following compounds show optical isomerism? I. cis -[Co(NH_(3))_(4) Cl_(2)]^(+) II. Trans - [Co(en)_(2) Cl_(2)]^(+) III. Cis - [Co(en)_(2) cl_(2)]^(+) IV. [Co(en)_(3)]^(3+) Choose the correct answer form the codes given below.

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

Write the IUPAC names of i) [Cr(NH_(3))_(4)Cl_(2)]^(2-) ii) [Pt(NH_(3))_(2)Cl_(2)]Cl_(2)