Question

what do you mean by eka-aluminium?

Answer 1

Eka Alluminium is the gallium. Gallium was not discovered at that time. Thatswhy he named Gallium as eka alluminium because they have some similar properties.

Answer 2

Mendeleev a Russian chemist and inventor predicted the existence of an undiscovered element and he named it - eka aluminium because of its proximity to aluminium in the periodic table. Eka aluminium is also called Gallium.