Question

Select the correct order of acidic strength of oxides.
(A) SO2 >SO3 > CO2
(B) Cs2O>K2O>Na2O
(C) CO2 > N2O5 > B2O3
(D) SO3 >CO2 >B2O3

Answer 1

Answer:

It is correct answer

Cs2O>K2O>Na2O

Answer 2

The correct order of acidic strength of oxides is an option (D) SO3 >CO2 >B2O3.

• The acidic strength of oxides decreases down the group and increases across the period.
• Acids are those substances that can release protons or can accept hydroxyl ions from the solution.
• Higher the oxidation state higher the acidic character.
• The higher the acidic character lower is the pH. so if N2O5 is more acidic than CO2 then the pH of N2O5 is less than CO2.
• SO3 oxidation state is +6, the CO2 oxidation rate is +4 and the B2O3 oxidation state is +3. so, SO3 is more acidic than CO2 and B2O3.