Consider the following reaction equation: CaO + SiO2 ——> CaSiO3: Silicon(IV) oxide is acting as?

A. a basic oxide
B. a reducing agent
C. an acidic oxide
D. an oxidizing agent

Correct Answer:

Option C – an acidic oxide

Explanation

Silicon dioxide is an acidic oxide. It will react with strong bases to form silicate salts, SiO2 is acidic oxide because Si is non-metal. Oxides of non-metals are acidic in nature.