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Identify the correct order of acidic strength of `CO_(2),CuO, CaO` and `H_(2)O`.

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Identify the correct order of acidic strength of `CO_(2),CuO, CaO` and `H_(2)O`.
A. `CaOltCuOltH_(2)OltCO_(2)`
B. `H_(2)OltCuOltCaOltCO_(2)`
C. `CaOltH_(2)OltCuOltCO_(2)`
D. `H_(2)OltCO_(2)ltCaOltCuO`
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Correct Answer - A
Non-metallic oxides are acidic and metallic oxides are basic. Thus the acidic order is `CaOltCuOltH_(2)OltCO_(2)`.
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