Question

The correct order of acidic strength is
A. `K_(2)0 gt CaO gt MgO`
B. `CO_(2) gt N_(2)O_(5) gt SO_(3)`
C. `Na_(2)O gt MgO gt Al_(2)O_(3)`
D. `Cl_(2)O_(7) gt SO_(2) gt P_(4)O_(10)`

Answer 1

Correct Answer - D
The species `Cl_(2)O_(7), SO_(2) and P_(4)O_(10)` are the anhydrides of `HClO_(4), H_(2)SO_(3) and H_(3)PO_(4)` respectively. The acid strength of these acids follows the order `HClO_(4) gt H_(2)SO_(3) gt H_(3)PO_(4)`. The corresponding anhydrides also follow the same order.