B. Assertion and reason both are true, but the reason is not the correct explanation of assertion.
C. The assertion is true, the reason is false.
D. The assertion is false the reason is true.
Assertion and reason both true, the reason is the correct explanation of assertion. Ambidentate ligands are those which have two different donor atoms in one single ligand. And these types of ligands give rise to the formation of linkage isomerism where the isomers only differ in the linkage of the ligand atom to the central metal atom.
Eg- this can be observed in the case of [Co(NH3)5(NO2)]Cl2 complex.
• In one form, the complex appears red in which the nitrite ligand is bound through one of the oxygen atom (-ONO) to the Co atom.
• In the other form, the complex is obtained in the yellow form in which the nitrite ligand is bound through the nitrogen atom (-NO2).
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