MCQ
What is the molecular formula of the oleum?
  • A
    $H _2 SO _3$
  • B
    $H _2 SO _4$
  • $H _2 S _2 O _7$
  • D
    $H _2 S _2 O _8$

Answer

Correct option: C.
$H _2 S _2 O _7$
$H _2 S _2 O _7$

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