Which group 2 element forms a hydroxide with the lowest solubility in water?
Solubility of group 2 hydroxides increases down the group due to decreasing lattice energy. Be(OH)2 has the lowest solubility due to Be’s small size and high charge density.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Modern Periodic Law and Present Form - Long Form Periodic Table