The acid anhydride that will produce weak acid in water is

  • A SO3
  • B NO2
  • C SO2
  • D CO2

The correct answer is D. CO2

H2CO3 is an example of a weak acid while H2SO4 and HNO3 are examples of a strong acid.

CO2 combines with water to give a weak trioxocarbonate (IV) acid.

CO2 + H2O → H2CO3

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