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During the water cycle, what is formed when raindrops dissolve nitrogen oxides (NOx) present in the air?

Answer and explanation

Correct answer: Nitric acid, contributing to acid rain

Correct answer: B, nitric acid. Nitrogen oxides released into the atmosphere can react with oxygen and water in clouds or raindrops, producing nitric acid and related nitrate compounds. The acidic water may then fall as part of acid rain. A sulfuric acid is mainly associated with sulfur dioxide and other sulfur oxides, not nitrogen oxides. C hydrochloric acid would require hydrogen chloride as the important pollutant. D carbonic acid forms when carbon dioxide dissolves in water; it is common in natural rain but is not the specific product asked for here. A useful distinction is: NOx is linked with nitric acid, while SOx is linked mainly with sulfuric acid.

Related tags

Acid-RainNitrogen-OxidesWater-CycleHydrological CycleThe Living WorldBiologyClass 11 Mcq

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