Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

done JEE Main Paper (Held On 11 April 2015) Total Questions - 2

• question_answer1) For the equilibrium, \[A(g)\rightleftharpoons B(g),\Delta H\]is -40 kJ/mol. If the ratio of the activation energies of the forward \[({{E}_{f}})\] and reverse \[({{E}_{b}})\]reactions is \[\frac{2}{3}\]then : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[{{E}_{f}}=60\,kJ/mol;{{E}_{b}}=100kJ/mol\]
  done clear
  B)
  \[{{E}_{f}}=30\,kJ/mol;{{E}_{b}}=70kJ/mol\]
  done clear
  C)
  \[{{E}_{f}}=80\,kJ/mol;{{E}_{b}}=120kJ/mol\]
  done clear
  D)
  \[{{E}_{f}}=70\,kJ/mol;{{E}_{b}}=30kJ/mol\]
  done clear
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• question_answer2) \[A+2B\to C,\]the rate equation for this reaction is given as Rate=k[A][B]. If the concentration of A is kept the same but that of B is doubled what will happen to the rate itself? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   halved
  done clear
  B)
   the same
  done clear
  C)
   doubled
  done clear
  D)
   quadrupled
  done clear
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