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NEET Sample Paper NEET Sample Test Paper-45

  • question_answer
    In the reaction \[2N{{a}_{2}}{{S}_{2}}{{O}_{3}}+{{I}_{2}}\,\,\to \,\,N{{a}_{2}}{{S}_{4}}{{O}_{6}}\,\,+\,\,2\,\,NaI\], the equivalent weight of \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\](\[mol.\,\,wt.=M\]) is equal to:

    A) M                                

    B) M/2

    C) M/3                              

    D) M/4

    Correct Answer: A

    Solution :

    +2               +2.5 \[N{{a}_{2}}\overset{+2}{\mathop{S{{O}_{3}}}}\,+{{I}_{2}}\,\,\,\to \,\,N{{a}_{2}}{{\overset{+2.5}{\mathop{{{S}_{4}}O}}\,}_{6}}\,\,+\,\,Nal\] \[n=2\times 0.5=1\] \[~E=\frac{M}{n-factor}=\frac{M}{I}=M\]


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