OLEUM IS ALSO KNOW AS __.
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SULPHURIC ACID
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NITRIC ACID
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FUMING SULPHURIC ACID
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SULPHUROUS ACID
Reveal answer
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C
Correct answer
Explanation
Oleum, also known as fuming sulphuric acid, is sulphuric acid with excess sulphur trioxide dissolved in it. Its chemical formula is H2S2O7. When oleum is diluted with water, it produces regular sulphuric acid. The term 'fuming' refers to the white fumes it releases when exposed to moist air due to SO3 release.
AI explanation
Oleum is a solution of sulfur trioxide dissolved in concentrated sulfuric acid, which makes it visibly 'fume' when exposed to moist air as it reacts to release sulfuric acid vapor — hence its common name, fuming sulphuric acid. It's distinct from ordinary sulfuric acid, nitric acid, and sulfurous acid, none of which fume in this characteristic way.