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Q.4    Assertion: Soaps are not suitable for washing purpose when water is hard.
                    Reason: Soaps have relatively weak cleansing action.

             Q.5    Assertion : Soap has good cleansing action.
                    Reason : Soap has short chain of hydrocarbon. Whichacts as hydrophobic
                    and long ionic part which acts as hydrophilic.





               Subjective-

             S.L                                     Questions                                     Ma Skill
             No.                                                                                   rk
             Q.1    Will micelle formation take place when soap is dissolved in organic            1     R
                    solvent?[CBSE 2014]

             Q.2    Explain why washing clothes with hard water is noteffective.      [CBSE        1     u
                    2014]

             Q.3    Explain the action of soap in removing an oily spotfrom a piece of             3     R+
                    cloth.[CBSE2011]
                                                                                                         A
             Q.4                                                                                   3     U+
                    What  is  difference  between  the  molecule  of  soaps  and
                    detergents,  chemically?  Explain  the  cleansing  actionof                          A
                    soaps.[CBSE2015].

             Q.5                                                                                   5     HO
                    Soaps  and  detergents  are  both  types  of  salts.  State                          T
                    the  difference  between  the  two.  Write  the  mechanismof  the
                    cleansing  action  of  soaps.  Why  do  soaps  not  form  lather
                    (foam)  with  hard  water?  Mention  any  two  problems  that
                    arise  due  to  the  use  of  detergents  instead  of  soaps.[CBSE
                    2017]





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