Which of the following oxides dissolves in water to form a strongly acidic solution?
Na2O
Al2O3
ZnO
SO3
CaO
A
SO3
B
CaO
C
Al2O3
D
Na2O
E
ZnO
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Solution
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Sulphur trioxide dissolves in water to from sulphuric acid;
SO3+H2O→H2SO4
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