Identify the correct formula of halides of alkaline earth metals from the following. (i) BaCl2.2H2O (ii) BaCl2.4H2O (iii) CaCl2.6H2O (iv) SrCl2.4H2O

Answer: option i) & iii)

The tendency to generate halide hydrates decreases gradually as one moves down the chemical group. The hydrates are MgCl₂.6H₂O, CaCl₂.6H₂O, SrCl_2.6H₂O, and BaCl_2.2H₂O.