Q. Eka-aluminium and Eka-silicon are known as

 2968  182 Classification of Elements and Periodicity in Properties Report Error

Solution:

Eka-aluminium is known as gallium and Ekasilicon is known as germanium because gallium is similar in properties to aluminium and one next to it and germanium is similar in properties to silicon and one next to it. (Eka in Sanskrit means one)