Arrange the following hydroxides based on their solubility in water:
Be(OH)2(I), Mg(OH)2(II), Ca(OH)2(III), Sr(OH)2(IV)
IV>III>II>I
I>II>III>IV
I>III>II>IV
IV>III>I>II
In case of hydroxides, the lattice energy decreases more rapidly than the hydration energy. So, the solubility increases as we move down the group.
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