NEET Chemistry Chemistry in Everyday Life Questions Solved

BOARD

(a) How do antiseptics differ from disinfectants ? Give one example of each. (Give two differences)

(b) Why do soaps not work in hard water ?                 (3 marks)

(a) 

    

 

(b) Hard water contains Ca+2 and Mg+2 ions. These ions form insoluble calcium and magnesium

      salts respectively, when Na or K soaps are dissolved in hard water. These insoluble salt, sepa-

      rate as scum which adheres to fabric, thereby making soap ineffective for cleansing action.

Difficulty Level:

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