NEET Chemistry Hydrogen Questions Solved


Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO2 is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A-

(A) CaCO3                             

(B) CaO

(C) CaOH2                           

(D) CaHCO32

(C). CaOH2 is used for the softening of temporary hard water.

        CaOH2aq+CO2g           CaCO3s+H2Ol

Difficulty Level:

  • 16%
  • 7%
  • 55%
  • 24%
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