MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp -Block Elements (group 15-18)Previous Year Questions

Which of the following statement is correct for oleum? (AIIMS 2019)

A.It is prepared by absorption of SO3 in conc. H2SO4✓ Correct

B.It contains O–O groups

C.It has six OH groups

D.None of the above

Explanation

Oleum, i.e, H2S2O7 can be prepared by absorption of SO3 in conc. H2SO4 as follows: 3 2 4 2 2 7 Oleum SO H SO H S O -> It’s structure is as follows: Thus, it has no O–O bond and has 2 –OH groups. Thus, option (a) is the correct.

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