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Sulphuric Acid — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistrySulphuric Acid1 Mark
MCQ
The molecular formula of oleum is _______
  • A
    $H _2 S_2 O _7$
  • B
    $H _3 S_2 O _3$
  • C
    $H _2 SO _6$
  • D
    $H _2 SO _4$
✓

Answer

A. $H _2 S_2 O _7$
Explanation: The molecular formula of oleum is $H _2 S_2 O _7$. Disulphuric acid or pyrosulphuric acid, also named oleum, is an oxyacid of sulphur. It is a major constituent of fuming sulphuric acid or oleum.

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