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Report Abuse. Acidic Gases are those gases, which when dissolved in water, show acidic properties. CO2 when dissolved gives H2CO3, which is acidic, NO2 gives HNO3(Nitric Acid). SO2 gives Sulphurous Acid, SO3 gives Sulphuric Acid. There are plenty of such examples.
Nitric oxide, NO, is a gas used in the manufacture of sulfuric acid; in air it forms nitrogen dioxide, NO 2, a poisonous reddish brown gas. Nitrogen trioxide, N 2 O 3, is unstable at ordinary temperatures. Nitrogen pentoxide, N 2 O 5, forms nitric acid when dissolved in water.Important compounds of nitrogen include nitric acid nitric acid,chemical compound, HNO3, colorless, highly corrosive, poisonous liquid that gives off choking red or yellow fumes in moist air.itrogen. (chemistry). A chemical element, symbol N, atomic number 7, atomic weight 14.0067; it is a gas, diatomic (N 2) under normal conditions; about 78% of the atmosphere is N 2; in the combined form the element is a constituent of all proteins.