BHU PMT BHU PMT (Screening) Solved Paper-2009

  • question_answer
    What is the product obtained when\[MnS{{O}_{4}}\]in solution is boiled with\[Pb{{O}_{2}}\]and concentrated\[HN{{O}_{3}}\]?

    A) \[Mn{{O}_{2}}\]                              

    B) \[HMn{{O}_{4}}\]

    C)  \[M{{n}_{3}}{{O}_{4}}\]                              

    D) \[PbMn{{O}_{4}}\]

    Correct Answer: B

    Solution :

                     On boiling\[MnS{{O}_{4}}\]with\[PbO{{ & }_{2}}\]and cone.\[HN{{O}_{3}},\] permanganic acid is obtained, due to which the colour of solution turns deep blue. \[Pb{{O}_{2}}+HN{{O}_{3}}(conc)\to Pb{{(N{{O}_{3}})}_{2}}+{{H}_{2}}O+[O]\] \[2MnS{{O}_{4}}+3{{H}_{2}}O+5[O]\xrightarrow{{}}\underset{\begin{smallmatrix}  permanganic \\  \,\,\,\,\,\,\,acid \end{smallmatrix}}{\mathop{2HMn{{O}_{4}}}}\,\] \[+2{{H}_{2}}S{{O}_{4}}\]


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