Question

Aluminium oxide as otherwise called as ______________

(a) aluminium sulphate

(b) alumina

(c) alum

(d) aluminium

This question was addressed to me in final exam.

My doubt stems from p-Block Elements in portion p-Block Elements of Chemistry – Class 11

Answer 1

Right answer is (b) alumina

To explain I would say: Alumina is also known as aluminium oxide and it is the most stable compound of aluminium that occurs in nature as colourless corundum and several coloured oxides, like ruby, topaz, sapphire, and emerald, these are used as precious stones.