Multiple choice general knowledge

Which is odd

  1. HCl

  2. HBr

  3. HF

  4. OH
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

HCl, HBr, and HF are all hydrogen halides (acids when dissolved in water). OH (hydroxide ion) is a base, not an acid, making it the odd one out in this chemical classification. The question tests knowledge of acid-base chemistry and chemical formulas.

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