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Question


What happens when magnesium oxide is dissolved in water?


Options:
A .   Magnesium is formed
B .   Magnesium hydroxide is formed
C .   Magnesium dioxide is formed
D .   Magnesium carbonate is formed
Answer: Option B
:
B

When magnesium oxide is dissolved in water, magnesium hydroxide is formed. So, the reaction between magnesium oxide and water is a chemical change, as a new substance(magnesium hydroxide) is formed.


MgO+H2OMg(OH)2


 



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