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An octahedral complex having molecular composition Co.5NH3.Cl.SO4 has two isomers A and B. The solution of A gives a white precipitate with AgNO3 solution and the solution of B gives white precipitate with BaCl2 solution. The type of isomerism exhibited by the complex is, (1) Ionisation isomerism (2) Co-ordinate isomerism (3) Geometrical isomerism (4) Linkage isomerism

1. (1) Ionisation isomerism
2. (2) Co-ordinate isomerism
3. (3) Geometrical isomerism
4. (4) Linkage isomerism

Correct answer: (1) Ionisation isomerism

Solution

Ionisation isomerism occurs when two or more isomers differ in the ions that are released into solution. In this case, the two isomers produce different precipitates with AgNO3 and BaCl2, indicating that they have different ions in solution, which is characteristic of ionisation isomerism.

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