The element common to all acids is known as :

Options :
  1. Calcium
  2. Hydrogen
  3. Carbon Dioxide
  4. Sulphur
Answer and Explanation :-

Answer: Option 2

Explanation:

When an acid is dissolved in water it releases hydrogen ions which combine with water to form hydrogen ions

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She supposed they were imperfections, those marks, but they didn't feel that way to her they were a history, cut into his body: the map of a life of endless war.
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