Saline hydrides are known to react with water violently producing fire. Can $CO_2$,a well-known fire extinguisher,be used in this case? Explain.

(N/A) Saline hydrides react violently with water to produce $H_2$ gas,which is highly combustible.
$NaH_{(s)} + H_2O_{(l)} \longrightarrow NaOH_{(aq)} + H_{2_{(g)}}$
$CO_2$ cannot be used as a fire extinguisher in this case because it reacts with saline hydrides. For example,$CO_2$ is reduced by $NaH$ to form sodium formate:
$2NaH_{(s)} + CO_{2(g)} \longrightarrow HCOONa_{(s)}$
Since this reaction is exothermic and can provide oxygen or react further,$CO_2$ is not suitable for extinguishing fires involving saline hydrides.