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Railways PYQCBT 1 2020

RRB NTPC · Question 72

Chemical formula for Lime water is _______

  1. Ca(OH)_2

  2. CaCl_2

  3. CaCO_3

  4. CaOH

Show answer & explanation

Answer: (A) Ca(OH)_2

Explanation

Lime water is a solution of calcium hydroxide, Ca(OH)₂, which turns milky with carbon dioxide.