(C) $Ca_3P_2 + 6H_2O \to 3Ca(OH)_2 + 2PH_3 \uparrow$ ($PH_3$ is a basic gas).$(b)$ $AlN + 3H_2O \to Al(OH)_3 + NH_3 \uparrow$ ($NH_3$ is a basic gas).

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(C) $Ca_3P_2 + 6H_2O \to 3Ca(OH)_2 + 2PH_3 \uparrow$ ($PH_3$ is a basic gas).$(b)$ $AlN + 3H_2O \to Al(OH)_3 + NH_3 \uparrow$ ($NH_3$ is a basic gas).$(c)$ $Al_2S_3 + 6H_2O \to 2Al(OH)_3 + 3H_2S \uparrow$ ($H_2S$ is an acidic gas).$(d)$ $CaH_2 + 2H_2O \to Ca(OH)_2 + 2H_2 \uparrow$ ($H_2$ is a neutral gas).