A. SO3
B. NO2
C. SO2
D. CO2
Correct Answer:
Option D – CO2
Explanation
H2CO3 is an example of a weak acid while H2SO4 and HNO3 are examples of strong acid.
CO2 combines with water to give a weak trioxocarbonate (IV) acid.
CO2 + H2O → H2CO3
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