Multiple choice general knowledge

Chemical formula for water

  1. H2O

  2. HO2

  3. H2O2

  4. 2HO
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A Correct answer
Explanation

Water's chemical formula is H2O, meaning two hydrogen atoms bonded to one oxygen atom. This is the standard formula recognized universally in chemistry. HO2 would imply one hydrogen and two oxygens, H2O2 is hydrogen peroxide (a different compound), and 2HO is not a valid standard notation.

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