Sulfur dioxide is the anhydride of sulfurous acid, H2SO3; the acid minus this oxide is water.
acid anhydride
Sulfur dioxide and nitrogen dioxide combine with water to make acid rain. Nitric oxide is neutral but is rapidly oxidised to nitrogen dioxide.
Basic anhydrides are metal oxides (any metal ion bonded to the oxide ion) like MgO or Na2O. Metal oxides strip one of the hydrogens away from water, leaving an OH ion.
Salycylic acid and acetic anhydride with a sulphuric acid catalyst
Acetanilide
No. Zinc oxide is a amphoteric oxide.
Nitric acid does not form the anhydride but dinitrogen penta oxide is theoretical anhydride of nitric acid.2HNO3 = N2O5 + H2O==========No. From the Wikipedia article on nitrogen pentoxide:N2O5 was first reported by Deville in 1840, who prepared it by treating AgNO3 with Cl2.Therefore, nitrogen pentoxide is the anhydride of nitric acid.
The anhydride of phosphoric acid is Phosphorous(V) Oxide. P4O10.
sulphuric acid
Sulphur , in a form of sulphur dioxide or sulphur oxide , I think. Acid rain can be caused by either nitric oxide or sulfur dioxide in the air, which result from the burning of fossil fuels.
An anhydride is not an acid and not a base.
Sulfur dioxide is an acidic oxide.
SO2, NO2, CO2 (not as important)
RaCO3 is a salt
Trifluoromethanesulfonic anhydride = (CF3SO2)2O
These gases form acids (sulphuric and nitric acidsrespectively) by reacting with oxygen an water present in air the first rain of the season contains droplets of these acids and effect the all material which is hit by such rain.
Sulphur dioxide is a non- metallic oxide and hence it is an acidic oxide. Since it is acidic in nature, when added to water it forms sulphuric acid which is an acid.