Question

Which of the following ions forms a hydroxide highly soluble in water?

• A. $N{a}^{2+}$
• B. $K^{+}$
• C. $Z{n}^{2+}$
• D. $A{l}^{3+}$

Answer 1

The correct option is B $K^{+}$

$1.$The correct option is $B$.
$2.$Hydroxides of potassium is highly soluble in water.
$3.$ Alkali metal hydroxides are highly soluble in water.