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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank The mole concept

  • question_answer
    The number of moles of sodium oxide in \[620g\] of it is  [BHU 1992]

    A)                 1 mol     

    B)                 10 moles

    C)                 18 moles               

    D)                 100 moles

    Correct Answer: B

    Solution :

               Sodium oxide \[\to \]\[N{{a}_{2}}O\]                    Molecular weight = 46 +16 = 62                    62gm of \[N{{a}_{2}}O\] = 1 mole                                 620gm of  \[N{{a}_{2}}O\]= 10 mole.


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