JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Colloids Emulsion, Gel and Their properties with application

  • question_answer
    Which of the following reactions leads to the formation of a substance in the colloidal state [MP PMT 1984; MP PET/PMT 1988]

    A)                                                                                  \[Cu+HgC{{l}_{2}}\to CuC{{l}_{2}}+Hg\]  

    B)                                                                  \[2HN{{O}_{3}}+3{{H}_{2}}S\to 3S+4{{H}_{2}}O+2NO\]  

    C)                                                                                         \[2Mg+C{{O}_{2}}\to 2MgO+C\]  

    D)                                                                              \[Cu+CuC{{l}_{2}}\to C{{u}_{2}}C{{l}_{2}}\]   (in presence of excess of \[HCl\])

    Correct Answer: B

    Solution :

                       \[2HN{{O}_{3}}+3{{H}_{2}}S\to \underset{(Sol)}{\mathop{3S}}\,+4{{H}_{2}}O+2NO\]


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