JEE Chemistry 2025 Question with Solution

Given: The complex is octahedral because it involves $sp^3d^2$ hybridisation. The solution states that the number of geometrical isomers for the relevant octahedral arrangement is $2$.

Find: The number of geometrical isomers exhibited by the complex.

From the solution, the key idea used is that in an octahedral complex having two possible relative arrangements of ligands, geometrical isomerism arises in two forms.

The extracted conclusion from the solution is:

Therefore, the required numerical answer is $2$.

Note: The solution contains inconsistent intermediate interpretation of the formula and of the value of $x$, but both listed approaches conclude that the number of geometrical isomers is $2$. Hence the final answer taken from the solution is $2$.