Assertion: Compounds which have same composition but differ in the number of water molecule as ligands and as molecules of hydration are called hydrate isomers.

Reason: Hydrate isomers give different ions in the solution.

Assertion is correct statement but reason is wrong statement.

The correct answer is option 3. Assertion is correct statement but reason is wrong statement.

Let us delve into the concepts of hydrate isomers and their implications as per the assertion and reason provided.

Assertion: Compounds which have the same composition but differ in the number of water molecules as ligands and as molecules of hydration are called hydrate isomers.

Hydrate isomers refer to compounds that have identical chemical formulas but differ in the arrangement of water molecules. These differences can occur in two ways:

1. As ligands: Water molecules can coordinate directly to the central metal ion in a coordination complex, forming part of the coordination sphere.

2. As molecules of hydration: Water molecules can be associated with the compound in the crystal lattice, not directly coordinated to the metal ion but held as part of the solid structure (hydrates).

Reason: Hydrate isomers give different ions in the solution.

This statement is incorrect because hydrate isomers do not give different ions in solution based solely on the arrangement of water molecules. The ions formed in solution depend on the dissociation of the compound itself, not on the number or arrangement of water molecules.

Conclusion

Assertion: Correct. Hydrate isomers indeed have the same composition but differ in the arrangement of water molecules as ligands or molecules of hydration.

Reason: Incorrect. The presence of hydrate isomers does not influence the ions formed in solution; rather, it pertains to the structural arrangement of water molecules within the compound.

The correct relationship between the assertion and reason is: \(\text{Assertion is correct statement but reason is wrong statement.}\). This conclusion aligns with the fact that while hydrate isomers describe structural differences in the arrangement of water molecules, they do not impact the ions produced in solution from these compounds.