Solved papers for JEE Main & Advanced JEE Main Paper (Held On 12 May 2012)

done JEE Main Paper (Held On 12 May 2012) Total Questions - 1

• question_answer1) Given (i)\[HCN(aq)+{{H}_{2}}O(l){{H}_{3}}{{O}^{+}}(aq)+C{{N}^{-}}(aq)\]\[{{K}_{a}}=6.2\times {{10}^{-10}}\] (ii)\[C{{N}^{-}}(aq)+{{H}_{2}}O(l)HCN(aq)+O{{H}^{-}}(aq)\] \[{{K}_{b}}=1.6\times {{10}^{-5}}.\] These equilibria show the following order of the relative base strength,     JEE Main Online Paper (Held On 12 May 2012)
  A)
  \[OH>{{H}_{2}}O>C{{N}^{-}}\]
  done clear
  B)
                         \[O{{H}^{-}}>C{{N}^{-}}>{{H}_{2}}O\]
  done clear
  C)
                         \[{{H}_{2}}O>C{{N}^{-}}>O{{H}^{-}}\]
  done clear
  D)
                         \[C{{N}^{-}}>{{H}_{2}}O>O{{H}^{-}}\]
  done clear
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