Fundamentholfundamenthol
JEE Main2019Chemistry
Q.

The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y. X and Y, respectively are:

  1. A

    Ca(HCO3)2 and Ca(OH)2

  2. B

    Mg(HCO3)2 and Mg(OH)2 

  3. C

    Mg(HCO3)2 and MgCO3

  4. D

    Ca(HCO3)2 and CaO 

Solution

Temporary hardness is caused by bicarbonates of calcium and magnesium

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