AIIMS AIIMS Solved Paper-2004

  • question_answer
    How much energy is released when 6 moles of octane is burnt in air? Given \[MnS{{O}_{4}}\] for \[\begin{matrix}    2KMn{{O}_{4}}+3{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}{{K}_{2}}S{{O}_{4}}  \\    +2MnS{{O}_{4}}+3{{H}_{2}}O+5[O]  \\    [{{H}_{2}}{{O}_{2}}+O\xrightarrow{{}}{{H}_{2}}O+{{O}_{2}}]\times 5  \\    \begin{align}   & \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ \\  & \underset{Pink}{\mathop{2KMn{{O}_{4}}+5{{H}_{2}}{{O}_{2}}+3{{H}_{2}}S{{O}_{4}}\xrightarrow[{}]{}}}\, \\  & {{K}_{2}}S{{O}_{4}}+\underset{colourless}{\mathop{2MnS{{O}_{4}}}}\,+8{{H}_{2}}O+5{{O}_{2}} \\ \end{align}  \\ \end{matrix}\] and \[KMn{{O}_{4}}\] respectively are \[{{H}_{2}}{{O}_{2}}\] and \[\therefore \]:

    A) \[KMn{{O}_{4}}\]

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

    C)        \[{{H}_{2}}{{O}_{2}}\]      

    D)        \[{{H}_{2}}{{O}_{2}}\]

    Correct Answer: B

    Solution :

    \[A{{g}^{+}}\]     ...(i) \[N{{i}^{2+}}\]      ...(ii) \[Al{{(OH)}_{3}}\]  ...(iii) \[N{{i}^{2+}}\] (iii) we have \[<1\] \[2-3\] \[3-4\] \[9-11\] Hence, energy exchanged when 6 moles of octane is burnt in air \[+1\] \[+5\]


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