Solved papers for JEE Main & Advanced JEE Main Paper (Held On 19 April 2014)

done JEE Main Paper (Held On 19 April 2014) Total Questions - 3

• question_answer1) Consider the reaction: \[{{H}_{2}}S{{O}_{3}}(aq)+S{{n}^{4+}}(aq)+{{H}_{2}}O(l)\] \[\to S{{n}^{2+}}(aq)+HSO_{4}^{-}(aq)+3{{H}^{+}}(aq)\] Which of the following statements is correct?     JEE Main Online Paper (Held On 19 April 2016)
  A)
  \[S{{n}^{4+}}\]is the oxidizing agent because it undergoes oxidation
  done clear
  B)
  \[S{{n}^{4+}}\]is the reducing agent because it undergoes oxidation
  done clear
  C)
  \[{{H}_{2}}S{{O}_{3}}\]is the reducing agent because it undergoes oxidation
  done clear
  D)
  \[{{H}_{2}}S{{O}_{3}}\]is the reducing agent because it undergoes reduction
  done clear
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• question_answer2) How many electrons are involved in the following redox reaction? \[C{{r}_{2}}O_{7}^{2-}+F{{e}^{2+}}+{{C}_{2}}O_{4}^{2-}\]\[\to C{{r}^{3+}}+F{{e}^{3+}}+C{{O}_{2}}\](Unbalanced)     JEE Main Online Paper (Held On 19 April 2016)
  A)
  3             
  done clear
  B)
  4
  done clear
  C)
  6                                             
  done clear
  D)
  5
  done clear
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• question_answer3) Amongst the following, identify the species with an atom in + 6 oxidation state:     JEE Main Online Paper (Held On 19 April 2016)
  A)
  \[{{[Mn{{O}_{4}}]}^{-}}\]                             
  done clear
  B)
  \[{{[Cr{{(CN)}_{6}}]}^{3-}}\]
  done clear
  C)
  \[C{{r}_{2}}{{O}_{3}}\]                  
  done clear
  D)
  \[Cr{{O}_{2}}C{{l}_{2}}\]
  done clear
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