AIIMS 2019 Chemistry Sulfur Compounds MCQ Question
Which of the following statement is correct for oleum ?
It is prepared by adsorption of in conc.
It contains O–O groups
I has six OH groups
None of these
Correct Answer
Detailed Explanation
Option B correctly represents the structure of oleum (H₂S₂O₇), which consists of two sulfuric acid (H₂SO₄) molecules with an additional sulfur trioxide (SO₃) unit. This structure highlights the presence of the disulfide bond, indicating the combination of sulfur trioxide with concentrated sulfuric acid. Other options are incorrect as they do not accurately depict the molecular structure or fail to represent the unique characteristics of oleum, such as the presence of the extra sulfur atom. Understanding oleum's structure is crucial for grasping its properties and applications in industrial processes.
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