What will be the correct order for the wavelengths of absorption in the visible region for the following: '[Ni(NO₂)₆ ]⁴⁻ ,[N i(NH₃)₆]²⁺,[Ni(H₂O)]^2+

The correct order of increasing bond lengths of the following bonds is C-H , C-O , C-C , C=C

Select the correct order of M - C bond order in the following molecule and ions : I. [Ni(CO)_4] II. [Co(CO)_4]^(Theta) III. [Fe(CO)_4]^(2-)

If in the mixed carbonyl, the other ligand is also pi acceptor, it would complete with the ligand CO for gaining the metal d_pi electron charge. The higher is the extent of back donationin CO, the lesser will be the stretching vibration frequency for C - O bond. If PPh_3 is better pi - acceptor than CO , then answer the following. Select correct order of stretching vibration frequency C - O bond in following molecules I. [Ni(CO)_4] II. [Ni(PF_3)(CO_3)]

What is the correct name for the following complex? [Co(NH_2)_2(NH_2 -CH_3)_2]Cl

The correct statement on the isomerism associated with the following complex ions : (A) [Ni(NH_(3))(H_(2)O)_(5)]^(2+) (B) [Ni(NH_(3))_(2)(H_(2)O)_(4)]^(2+) and (C ) [Ni(NH_(3))_(3)(H_(2)O)_(3)]^(2+) is (1) A & B show only geometric isomerism (2) B & C show only geometric isomerism (3)A & B show geometric and optical isomerisms (4) B & C show geometrical and optical isomerisms

Choose the correct order for Delta_@ for the following complexes. I) [Co(H_2O)_6]^(2+) II) [Co(H_2O)_6]^(3+) III) [Fe(H_2O)_6]^(3+) IV) [Fe(CN)_6]^(3-)