The correct order of acidic strength:

1.	The correct order of acidic strength:
A.	\[C{{l}_{2}}{{O}_{7}}>S{{O}_{2}}>{{P}_{4}}{{O}_{10}}\]
B.	\[{{K}_{2}}O>CaO>MgO\]
C.	\[C{{O}_{2}}>{{N}_{2}}{{O}_{5}}>S{{O}_{3}}\]
D.	\[N{{a}_{2}}O>MgO>A{{l}_{2}}{{O}_{3}}\]
Answer» B. \[{{K}_{2}}O>CaO>MgO\]

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The correct order of acidic strength:

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