Solved papers for JEE Main & Advanced JEE Main Paper (Held On 12 April 2014)

done JEE Main Paper (Held On 12 April 2014) Total Questions - 2

• question_answer1) The \[\left( S{}^\circ  \right)\] of the following substances are: \[C{{H}_{4}}(g)186.2J{{K}^{-1}}mo{{l}^{-1}}\] \[{{O}_{2}}(g)205.2J{{K}^{-1}}mo{{l}^{-1}}\] \[{{H}_{2}}O(g)69.9J{{K}^{-1}}mo{{l}^{-1}}\] The entropy change \[(\Delta {{S}^{o}})\]for the reaction : \[C{{H}_{4}}(g)+2{{O}_{2}}(g)\to C{{O}_{2}}(g)+2{{H}_{2}}O(l)\]is:   [JEE Main Online Paper ( Held On 12 Apirl  2014 )
  A)
  \[-312.5J{{K}^{-1}}mo{{l}^{-1}}\]
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  B)
  \[-242.8J{{K}^{-1}}mo{{l}^{-1}}\]
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  C)
  \[-108.1J{{K}^{-1}}mo{{l}^{-1}}\]
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  D)
  \[-37.6J{{K}^{-1}}mo{{l}^{-1}}\]
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• question_answer2) The standard enthalpy of formation \[({{\Delta }_{f}}{{H}^{o}}_{298})\]for methane, \[C{{H}_{4}}\]is\[-74.9kJ\,mo{{l}^{-1}}.\]In order to calculate the average energy given out in the formation of a C ? H bond from this it is necessary to know which one of the following?   [JEE Main Online Paper ( Held On 12 Apirl  2014 )
  A)
  The dissociation energy of the hydrogen molecule, \[{{H}_{2}}\].
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  B)
  The first four ionisation energies of carbon.
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  C)
  The dissociation energy of \[{{H}_{2}}\]and enthalpy and sublimation of carbon (graphite).
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  D)
  The first four ionisation energies of carbon and electron affinity of hydrogen.
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