A metal complex having the molecular formula `Cr(NH_3)_4Cl_2`,Br have been isolated in two forms (A) and (B). The form (A) reacts with `AgNO_3` giving white precipitate readily soluble in dilute `NH_4OH` while (B) gives a yellow precipitate soluble in concentrated `NH_4OH`. Answer the following questions : The formula of complex A is

The complex [Co(NH_3)_5Br] SO_4 give white precipitates with BaCl_2 solution while [CO(NH_3)_5SO_4]Br give yellow precipitate with AgNO_3 solution. Explain.

The complex [Co(NH_3)_5Br]SO_4 will give white precipitates with

A Compound with the empirical formula Co(NH_3)_5 BrSO_4 exists in two forms : red and violet. Solution of red gives a precipitate of AgBr on addition of AgNO_3 . The violet form Sives no precipitate on the addition at AgNO_3 but gives a white precipitate on addition of BaCl_2 solution. From these observations draw the structure of each compound and explain the observations.

Write the IUPAC name of the complex [Cr(NH_3)_4Cl_2]^+ .What type of isomerism does it exhibit ?

An aqueous solution of [Pt(NH_3)_2Cl_2] gives white precipitate of AgCl with AgNO_3(aq) .

An aqueous solution of [Pt(NH_3)_2Cl_2] gives white precipitate of AgCl with AgNO_3(aq) .

Why does NH_3 readily form complexes but NH_4^(+) does not ?

Give IUPAC name of complex compound [Co (NH_3)_4 (H_2O) Br] (NO_3)_2 .

Give IUPAC name of complex compound [Co (NH_3)_4 (H_2O) Br) (NO_3)_2

Ni^(2+) overset (KCN) rarr Complex 1 Ni^(2+) overset (excess) underset (KCI) rarr Complex 2 Both the above complexes have coordination number 4. Answer the following (1-3) questions : The IUPAC names for the complexes are respectively