Which of the following oxide is not attacked by water?
A
BaO
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B
SrO
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C
MgO
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D
BeO
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Solution
The correct option is D BeO Beryllium oxide is not attacked by water. It is insoluble in water because in the solid state, the BeO molecules are tightly held. The oxides of other alkaline earth metals react with water to form basic hydroxides.