A) dissolution of ammonia in water
B) dissolution of carbon dioxide in water
C) dissolution of oxygen in water
D) None of these
Correct Answer: C
Solution :
Dissolution of oxygen in water is not a chemical change as no new substance is formed in it. [In case of dissolution of ammonia in water ammonium hydroxide is formed. In case of dissolution of carbon dioxide in water anew substance, carbonic acid, is formed]
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