Solved papers for JEE Main & Advanced JEE Main Paper (Held on 7 May 2012)

done JEE Main Paper (Held on 7 May 2012) Total Questions - 1

• question_answer1) A battery is constructed of Cr and \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}.\]The unbalanced chemical equation when such a battery discharges is following: \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}+Cr+{{H}^{+}}\to C{{r}^{3+}}+{{H}_{2}}O+N{{a}^{+}}\] If one Faraday of electricity is passed through the battery during the charging, the number of moles of \[C{{r}^{3+}}\] removed from the solution is   JEE Main Online Paper (Held On 07 May 2012)
  A)
  \[\frac{4}{3}\]                                   
  done clear
  B)
                         \[\frac{1}{3}\]
  done clear
  C)
                         \[\frac{3}{3}\]                                   
  done clear
  D)
                         \[\frac{2}{3}\]
  done clear
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