Which of the following is an example of a metal oxide?
A
MgO
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B
NH4OH
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C
HCl
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D
H2SO4
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Solution
The correct option is AMgO Metals react with oxygen to form metal oxides. Here, MgO is a metal oxide formed when magnesium (metal) is burned in air. H2SO4 and HCl are acids and NH4OH is a weak base.