Solved papers for JEE Main & Advanced AIEEE Solved Paper-2009

done AIEEE Solved Paper-2009 Total Questions - 2

• question_answer1) In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is \[C{{H}_{3}}OH(l)+3/2{{O}_{2}}(g)\xrightarrow[{}]{{}}C{{O}_{2}}(g)+2{{H}_{2}}O(l)\] At 298 K standard Gibb?s energies of formation for\[C{{H}_{3}}OH(l),{{H}_{2}}O(l)\]and\[C{{O}_{2}}(g)\]are -166.2, - 237.2 and -394.4 kJ \[mo{{l}^{1}}\]respectively. If standard enthalpy of combustion of methanol is\[726\text{ }kJ\text{ }mo{{l}^{1}},\] efficiency of the fuel cell will be:     AIEEE  Solved  Paper-2009
  A)
  80%                                       
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  B)
  87%
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  C)
  90%                       
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  D)
         97%
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• question_answer2) On the basis of the following thermo chemical data:\[(\Delta f\,{{G}^{o}}H_{(aq)}^{+}=0)\] \[{{H}_{2}}O(l)\xrightarrow[{}]{{}}{{H}^{+}}(aq)+O{{H}^{}}(aq);\]              \[\Delta H=57.32\text{ }kJ\] \[{{H}_{2}}O(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}{{H}_{2}}O(l);\] \[\Delta H=-286.20\,KJ\] The value of enthalpy of formation of\[O{{H}^{}}\]ion at\[25{}^\circ C\]is:     AIEEE  Solved  Paper-2009
  A)
  -22.88 kJ                              
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  B)
  -228.88 kJ           
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  C)
         +228.88 kJ          
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  D)
         -343.52 kJ
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