Question

In Group 2 (IIA),
(a) Maximum basic oxide is $RaO$.
(b) Maximum soluble sulphate is $BeS{O}_4$.
(c) Maximum soluble carbonate is $BeC{O}_3$.
(d) Maximum soluble flouride is $Ra{F}_2$
(e) Maximum hydrated ion is $B{e}^{2+}$
Out of the above statements:

• A. two are false
• B. one is false
• C. four are false
• D. None of these

Answer 1

The correct option is D None of these

(a) Maximum basic oxide is $RaO$. The statement is true because as we move from top to bottom in a group the basic strength of oxides will be increased. So $RaO$ is more basic.

(b) Maximum soluble sulphate is $BeS{O}_4$. The statement is true because as we move from top to bottom in a group the solubility of sulfates will be decreased. So $BeS{O}_4$ is more soluble.

(c) Maximum soluble carbonate is $BeC{O}_3$. The statement is true because as we move from top to bottom in a group the solubility of carbonates will be decreased. So $BeC{O}_3$ is more soluble.

(d) Maximum soluble flouride is $Ra{F}_2$. The statement is true because as we move from top to bottom in a group the solubility of fluorides will be increased. So $Ra{F}_2$ is more soluble.

(e) Maximum hydrated ion is $B{e}^{2+}$. This is true statement.

Hence option D is correct.