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) The d-electron configurations of \[C{{r}^{2+}},M{{n}^{2+}},F{{e}^{2+}}\]and \[C{{o}^{2+}}\]are \[{{d}^{4}},{{d}^{5}},{{d}^{6}}\]and \[{{d}^{7}}\] respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. Cr =24, Mn = 25, Fe = 26, Co = 27).     JEE Main Online Paper (Held On 07 May 2012)
  A)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
  B)
                         \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
  C)
                         \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]    
  done clear
  D)
                         \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
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