# Halides (Cl,Br and I) of alkaline earth metal which cannot be dehydrated by heating is (are)

$(a)\;Mg^{2+},Be^{2+}\qquad(b)\;Mg^{2+}\qquad(c)\;Ba^{2+}\qquad(d)\;Be^{2+}$

Halides (Cl,Br and I) of alkaline earth metal which cannot be dehydrated by heating is (are) $Mg^{2+}$ and $Be^{2+}$
Hence (a) is the correct answer.