JEE Main & Advanced Chemistry Redox Reactions / रेडॉक्स अभिक्रियाएँ Question Bank

done Numerical Value Type Questions - Redox Reactions Total Questions - 15

• question_answer1)
  Find the sum of oxidation number of nitrogen in \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\].\[{{N}_{2}}{{H}_{4}}\] and \[{{N}_{2}}{{O}_{4}}\].
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• question_answer2)
  Among \[N{{H}_{3}},\,\,HN{{O}_{3}},\,\,Na{{N}_{3}}\] and \[M{{g}_{3}}{{N}_{2}}\]. Find the number of molecules having nitrogen in negative oxidation state.
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• question_answer3)
  When \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] is converted into \[{{K}_{2}}Cr\,{{O}_{4}}\] What will be the change in oxidation number of chromium?
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• question_answer4)
  Find the ratio of oxidation numbers of P in \[PO_{4}^{3-}\] and Cr in \[C{{r}_{2}}O_{7}^{2-}\].
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• question_answer5)
  In a balance equation \[{{H}_{2}}S{{O}_{4}}+x\,HI\to {{H}_{2}}S+y{{I}_{2}}+z{{H}_{2}}O,\] find the ratio of x + y : y + z
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• question_answer6)
  One mole of \[{{N}_{2}}{{H}_{4}}\] loses 10 moles of electrons to form a new compound, y. Assuming that all nitrogen appear in the new compound, what is the oxidation state of nitrogen in y (there is no change in the oxidation state of hydrogen)?
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• question_answer7)
  Balance the redox reaction and find the sum of coefficient of \[MnO_{4}^{-}\] and \[M{{n}^{2+}}\]. \[MnO_{4}^{-}+{{C}_{2}}O_{4}^{2-}+{{H}^{+}}\to \,\,M{{n}^{2+}}+C{{O}_{2}}+\,\,{{H}_{2}}O\]
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• question_answer8)
  The equivalent weight of a metal is 36. What weight of the metal would give 9.322 gm. of its chloride?
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• question_answer9)
  Find the ratio of equivalent weight of \[MnO_{4}^{-}\] in acidic and basic media.
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• question_answer10)
  Find the number of moles of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]reduced by three mole of \[S{{n}^{2+}}\] ions.
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• question_answer11)
  Find the equivalent weight of barium in \[Ba\,Cr\,{{O}_{4}}\] which is used as an oxidising agent in acidic medium. (At wt. of Ba= 137.34)
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• question_answer12)
  50 mL of 0.1 M solution of a salt reacted with 25 mL of 0.1 M solution of sodium sulphite. The half reaction for the oxidation of sulphite ion is: \[SO_{3}^{2-}(aq)+{{H}_{2}}O(l)\to SO{{_{4}^{2-}}^{~}}(aq)+2{{H}^{+}}(aq)+2{{e}^{-}}\] If the oxidation number of metal in the salt was 3, what would be the new oxidation number of metal?
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• question_answer13)
  \[{{N}_{2}}+3{{H}_{2}}\xrightarrow{{}}2N{{H}_{3}},\] molecular weight and equivalent weight of \[N{{H}_{3}}\] and \[{{N}_{2}}\] are 17.03 g, 14 g and \[{{Y}_{1}},{{Y}_{2}}\] respectively. Find the value of\[({{Y}_{1}},{{Y}_{2}})\].
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• question_answer14)
  An element A in a compound ABD has oxidation number\[{{A}^{2-}}\]. It is oxidised by \[C{{r}_{2}}O_{7}^{2-}\] in acidic medium. In the experiment  \[1.68\times {{10}^{-\,3}}\] moles of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] were used for \[3.26\times {{10}^{-\,3}}\]moles of ABD. What would be new oxidation number of A after oxidation.
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• question_answer15)
  Find the oxidation state of Fe in \[(F{{e}_{4}}{{[Fe{{(CN)}_{6}}]}_{3}}\].  
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