Question

When oxides of boron and silicon reacts with excess of $Mg$:

• A. reduction takes place
• B. oxidation takes place
• C. formation of borides and silicides take place
• D. none

Answer 1

The correct option is C formation of borides and silicides take place

Oxides of both are acidic and can be reduced by limited amount of $Mg$.In excess of $Mg$,boride and silicide are formed.