Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion?

If two circular discs of same weight and thickness are made from metals having different densities, which disc will have large MI about its central axis?

Square planer complex (of MX_2L_2 type) with Coordination number of 4 exhibit geometrical isomerism where as tetrahedral complexes with similar composition do not why?

Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill upto a particular common height. Is the force exerted by the water on the base of the vessel the same in the two cases? If so, why do the vessels filled with water to that same height give different readings on a weighing scale?

Depending upon the repulsive force between the ligands & the central metal ion. d-orbital of the metal ion is further divided into two groups. What are they/ Which group has higher energy in tetrahedral complex.

Two metals X and Y have work functions 2eV and 5eV respectively. Which metal will emit electrons, when it is irradiated with light of wavelength 400 nm and why?

A compound is formed by two types of ions viz. A (as cation) & B (as anion). B ions make ccp and A ions occupy the all the tetrahedral voids. Write the formula of the compound.