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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 12

  • question_answer
    \[{{\Delta }_{f}}{{H}^{\bigcirc -}}\] of hypothetical \[MgCl\]is \[-125\text{ }kJ\text{ }mo{{l}^{-1}}\] and for \[MgCl\] is \[~-642\text{ }kJ\text{ }mo{{l}^{-1}}\]. The enthalpy of disproportionation of \[MgCl\] is \[-49x\]. Find the value of x.

    Answer:

    8


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