Q:
      
      
         
            
Temporary hardness is due to the presence of 
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: B) calcium bicarbonate         
         
Explanation: Temporary hardness is due to the presence of soluble bicarbonates of calcium and magnesium in water. Permanent hardness is due to the presence of sulphates and chlorides of calcium and magnesium.
       
      
      
      
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