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Railways PYQCBT 1 2016

RRB NTPC · Question 81

If H2O : Hydrogen then KOH : ________

  1. Cobalt

  2. Phosphorous

  3. Potassium

  4. Krypton

Show answer & explanation

Answer: (C) Potassium

Explanation

H₂O contains hydrogen (H). In the same way, KOH (potassium hydroxide) contains potassium, whose symbol is K (from the Latin 'kalium').