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Answer:I can answer 1 one...Explanation:Metallic oxides are basic in nature because they react with dilute acids to form salt and water. They also react with water to form metal hydroxides which are alkaline in nature because these metal hydroxides release OH- ions in solution. ... Therefore, non metallic oxides would be acidic in nature.
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It's ph will decrease between 4.4 to 4.8 .So they are acidic , acids taste sour.
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