UPSC CDS 1 2018 GK Paper

Among the given gases, Carbon dioxide dissolves in water to give the acidic solution. Carbon Dioxide gas dissolves in water to give Hydro carbonic Acid or Carbonic Acid, in short, which is H2CO3 in chemical symbols. CO2+H2O→H2CO3 (Carbonic acid).Generally, nonmetal oxides dissolve in water and form acidic solutions