Question

Eka-aluminium and Eka-silicon are respectively known as?

• A. Gallium and germanium
• B. Iron and sulphur
• C. Aluminium and silicon
• D. Carbon and nitrogen

Answer 1

The correct option is A Gallium and germanium

Mendeleev predicted the properties of Eka-aluminium and Eka-silicon which were unknown at that time to fill the gaps under aluminium and silicon in the periodic table. Later, when these elements were discovered, their properties were found to be similar to those predicted by Mendeleev and were later named as gallium and germanium respectively.