${\mathrm{Mg}}_2{\mathrm{C}}_3$ possess which of the following characteristics?

The formula of Magnesium allylenide is Mg₂C₃. It contains two ions, ${\mathrm{Mg}}^{2+} \mathrm{and} {\mathrm{C}}_3^{4-}.$ Reaction of Mg₂C₃ with water (hydrolysis of Mg₂C₃) is:

${\mathrm{Mg}}_2{\mathrm{C}}_3+4{\mathrm{H}}_2\mathrm{O}\to 2\mathrm{Mg}(\mathrm{OH}{)}_2+{\mathrm{CH}}_3\mathrm{C}\equiv \mathrm{CH}$

This indicates all statements regarding Mg₂C₃ are correct.