Solved papers for JEE Main & Advanced JEE Main Paper (Held On 19 May 2012)

done JEE Main Paper (Held On 19 May 2012) Total Questions - 2

• question_answer1) Which of the following paramagnetic ions would exhibit a magnetic moment (spin only) of the order of 5 BM? (At. Nos. \[Mn=25,Cr=24,V=23,Ti=22\])     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  \[M{{n}^{2+}}\]                               
  done clear
  B)
                         \[T{{i}^{2+}}\]
  done clear
  C)
                         \[{{V}^{2+}}\]                                   
  done clear
  D)
                         \[C{{r}^{2+}}\]
  done clear
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• question_answer2) If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become     JEE Main  Online Paper (Held On 19  May  2012)
  A)
  one fourth        
  done clear
  B)
                         half
  done clear
  C)
                         four times          
  done clear
  D)
                         two times
  done clear
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