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Doctors Medicines MCQs Q&A

  1. cold water 
  2. steam
  3. semi-hot water
  4. hot water
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1 Answers

Option 1 : cold water 

  • Magnesium (Mg) reacts very slightly with cold water.
  • The reaction between Magnesium and cold water stops very quickly because the magnesium hydroxide (Mg(OH)₂) formed is insoluble in water and forms a barrier on the magnesium stopping any reaction.
  • The chemical reaction is as follows: Mg + 2H₂O → Mg(OH)₂ + H₂.
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