The one that is not expected to show isomerism is:

An aqueous solution of $[Ni(H_2O)_6]^{2+}$ contains $Ni^{2+}$ ions and has a magnetic moment of $2.83 \ BM$. What is the effect on the magnetic moment of the solution when ammonia is added?

Why do compounds having similar geometry have different magnetic moments?

Among the species given below, the spin-only magnetic moment is highest for
(Given: Atomic number of $Ti = 22, Mn = 25, Fe = 26$ and $Co = 27$)

Among the following,the compound that is both diamagnetic and coloured is

Consider the following isomers of $[Cr(NH_3)_2 Cl_4]^-$ and identify the correct classification of these isomers as $cis$ or $trans$.