Both Calcium Carbide () and Beryllium Carbide () undergo complete hydrolysis when treated with water — s Block Elements Chemistry Question

💡 Solution & Explanation

$CaC_2$ is an acetylide containing the $C_2^{2-}$ ion, thus yielding Acetylene ($C_2H_2$) on hydrolysis. $Be_2C$ (like $Al_4C_3$) is a methanide containing discrete $C^{4-}$ ions, thus yielding Methane ($CH_4$) upon hydrolysis.