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Acidic,Basic Natures of Oxides

Which of the ...

Question

Which of the following is wrong?

NH3 < PH3 < AsH3 < Acidic character

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Li < Be < B < C < IE1

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Al2O3 < MgO < Na2O < K2O < Basic character

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Li+ < Na+ < K+ < Cs+ < Ionic radius

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Solution

The correct option is C
Al2O3 < MgO < Na2O < K2O < Basic character

Across a period, the Basic character of oxides decreases. This means that aluminium oxide will have lowest basic character.

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