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AIIMS AIIMS Solved Paper-2003

  • question_answer
    One gram sample of \[2{{H}_{2}}(g)+{{O}_{2}}(g)\xrightarrow{{}}2{{H}_{2}}O(l)\] is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by 6.12K. The heat capacity of the system is 1.23 kJ/g/deg. What is the molar heat of decomposition for\[2Fe(s)+{{O}_{2}}(g)+4{{H}^{+}}(aq)\xrightarrow{{}}\]?

    A)  \[2F{{e}^{2+}}(aq)+2{{H}_{2}}O(l)\]

    B)  \[0.8M{{H}_{2}}S+0.8MKHS\]

    C)  \[2M{{C}_{6}}{{H}_{5}}N{{H}_{2}}+2M{{C}_{6}}{{H}_{5}}N{{H}_{3}}Br\]

    D)  \[3M{{H}_{2}}C{{O}_{3}}+3MKHC{{O}_{3}}\]

    Correct Answer: D

    Solution :

    We know that heat of decomposition \[COC{{H}_{3}}\] \[NHCOC{{H}_{3}}\] \[C{{H}_{3}}{{O}^{-}}\] \[{{C}_{6}}{{H}_{5}}{{O}^{-}}\]Heat of decomposition \[{{(C{{H}_{3}})}_{2}}CH{{O}^{-}}\] \[{{(C{{H}_{3}})}_{3}}C{{O}^{-}}\] Molar heat of decomposition of \[C{{H}_{3}}C{{O}_{2}}C{{H}_{3}}\] \[C{{H}_{3}}C{{O}_{2}}{{C}_{2}}{{H}_{5}}\] \[{{C}_{6}}{{H}_{5}}C{{O}_{2}}C{{H}_{3}}\] Heat released when one mole is decomposed  \[C{{H}_{3}}C{{O}_{2}}{{C}_{6}}{{H}_{5}}\]


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