In some foam-type fre extinguishers, the treactants are `Al_2 (SO_4)_3` (aq) and `NaHCO_3` (aq). T=When the extinguisher is activated, these reactants are allowed to mix producing `Al(OH)_(3(s))` and ` CO_(2(g))`. The ` al (OH)_3 - CO_2` foram extinguishes the fires .
Addition of `Na_2 CO_3` to a solution of an oxide in eater produces `CO_2`. This experiment indicaltes that :
A. the oxide is that of non-metal
B. the oxide is amphoteric
C. the oxide is basic
D. the oxide is neutral