Multiple choice Which of the following metal hydroxides has the lowest value of Ksp? Mg(OH)2 Ca(OH)2 Ba(OH)2 Be(OH)2 Reveal answer Fill a bubble to check yourself D Correct answer Explanation The hydroxide of beryllium is amphoteric in nature and beryllium has covalent nature also, because of which it is least soluble and has lowest value of Ksp.