NEET Chemistry Hydrogen Questions Solved


Hardness of water is due to presence of salts of –

(A) Na+ and K+                                  

(B) Ca2+ and Mg2+

(C) Ca2+ and K+                                 

(D) Ca2+ and Na+

(B).   Hardness of water is due to the presence of bicarbonates, chlorides and sulphates of Ca and

         Mg on it. These Ca2+ and Mg2+ ions react with the anions of fatty acids present in soaps to

         form curdy white precipitates. As a result, hard water does not produce lather with soap

         immediately. 

Difficulty Level:

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