A) \[N{{a}_{2}}O,\,MgO,\,A{{l}_{2}}{{O}_{3}},\,CuO\]
B) \[MgO,\,A{{l}_{2}}{{O}_{3}},\,CuO,\,N{{a}_{2}}O\]
C) \[A{{l}_{2}}{{O}_{3}},\,MgO,\,CuO,\,N{{a}_{2}}O\]
D) \[CuO,\,N{{a}_{2}}O,\,MgO,\,A{{l}_{2}}{{O}_{3}}\]
Correct Answer: A
Solution :
\[N{{a}_{2}}O,\,\,MgO,\,\,A{{l}_{2}}{{O}_{3}},\,\,CuO\]. More the metallic character higher the \[{{e}^{-}}\] donating tendency. Therefore lower the I.E. more the basic nature of oxide.
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