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

done Oxidizing and Reducing agent Total Questions - 32

• question_answer1)
  Equation \[{{H}_{2}}S+{{H}_{2}}{{O}_{2}}\to S+2{{H}_{2}}O\] represents                 [UPSEAT 2001]
  A)
                  Acidic nature of\[{{H}_{2}}{{O}_{2}}\]       done clear
  B)
                  Basic nature of \[{{H}_{2}}{{O}_{2}}\] done clear
  C)
                  Oxidising nature of \[{{H}_{2}}{{O}_{2}}\] done clear
  D)
                  Reducing nature of \[{{H}_{2}}{{O}_{2}}\] done clear
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• question_answer2)
  In the reaction                 \[{{C}_{2}}O_{4}^{2-}+MnO_{4}^{-}+{{H}^{+}}\,\to \,M{{n}^{2+}}+C{{O}_{2}}+{{H}_{2}}O\]                 the reductant is                [EAMCET 1991]
  A)
                  \[{{C}_{2}}O_{4}^{2-}\] done clear
  B)
                  \[MnO_{4}^{-}\] done clear
  C)
                  \[M{{n}^{2+}}\]                done clear
  D)
                  \[{{H}^{+}}\] done clear
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• question_answer3)
  A reducing agent is a substance which can [CPMT 1971, 74, 76, 78, 80; NCERT 1976]
  A)
                  Accept electron                done clear
  B)
                  Donate electrons done clear
  C)
                  Accept protons done clear
  D)
                  Donate protons done clear
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• question_answer4)
  Which of the following is the most powerful oxidizing agent [MNR 1990; CPMT 2003]
  A)
                  \[{{F}_{2}}\]       done clear
  B)
                  \[C{{l}_{2}}\] done clear
  C)
                  \[B{{r}_{2}}\]     done clear
  D)
                  \[{{I}_{2}}\] done clear
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• question_answer5)
  Of the four oxyacids of chlorine the strongest oxidising agent in dilute aqueous solution is           [MP PET 2000]
  A)
                  \[HCl{{O}_{4}}\]                done clear
  B)
                  \[HCl{{O}_{3}}\] done clear
  C)
                  \[HCl{{O}_{2}}\]                done clear
  D)
                  \[HOCl\] done clear
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• question_answer6)
  Identify the correct statement about \[{{H}_{2}}{{O}_{2}}\]         [AIIMS 1996]
  A)
                  It acts as reducing agent only done clear
  B)
                  It acts as both oxidising and reducing agent done clear
  C)
                  It is neither an oxidiser nor reducer done clear
  D)
                  It acts as oxidising agent only done clear
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• question_answer7)
  Several blocks of magnesium are fixed to the bottom of a ship to             [AIEEE 2003]
  A)
                  Keep away the sharks    done clear
  B)
                  Make the ship lighter done clear
  C)
                  Prevent action of water and salt done clear
  D)
                  Prevent puncturing by under-sea rocks done clear
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• question_answer8)
  Which of the following behaves as both oxidising and reducing agents   [AFMC 1995]
  A)
                  \[{{H}_{2}}S{{O}_{4}}\]  done clear
  B)
                  \[S{{O}_{2}}\] done clear
  C)
                  \[{{H}_{2}}S\]    done clear
  D)
                  \[HN{{O}_{3}}\] done clear
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• question_answer9)
  The reaction \[{{H}_{2}}S+{{H}_{2}}{{O}_{2}}\to 2{{H}_{2}}O+S\] shows                                                                 [JIPMER 2001]
  A)
                  Oxidizing action of \[{{H}_{2}}{{O}_{2}}\] done clear
  B)
                  Reducing action of \[{{H}_{2}}{{O}_{2}}\] done clear
  C)
                  Alkaline nature of \[{{H}_{2}}{{O}_{2}}\] done clear
  D)
                  Acidic nature of \[{{H}_{2}}{{O}_{2}}\] done clear
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• question_answer10)
  Which of the following is not a reducing agent [EAMCET 1987]
  A)
                  \[NaN{{O}_{2}}\]             done clear
  B)
                  \[NaN{{O}_{3}}\] done clear
  C)
                  \[HI\]    done clear
  D)
                  \[SnC{{l}_{2}}\] done clear
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• question_answer11)
  Which of the following cannot work as oxidising agent [CPMT 1996]
  A)
                  \[{{O}_{2}}\]      done clear
  B)
                  \[KMn{{O}_{4}}\] done clear
  C)
                  \[{{I}_{2}}\]        done clear
  D)
                  None of these done clear
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• question_answer12)
  \[{{H}_{2}}{{O}_{2}}\] is used as                [CPMT 1994]
  A)
                  An oxidant only done clear
  B)
                  A reductant only done clear
  C)
                  An acid only done clear
  D)
                  An oxidant, a reductant and an acid done clear
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• question_answer13)
  In \[C+{{H}_{2}}O\,\to \,\,CO+{{H}_{2}},\,\,{{H}_{2}}O\] acts as [AFMC 1988]
  A)
                  Oxidising agent done clear
  B)
                  Reducing agent done clear
  C)
                  A and B both      done clear
  D)
                  None of these done clear
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• question_answer14)
  Strongest reducing agent is         [CPMT 1977;  BHU 1984, 96; MP PET 1990;  AMU 1999]
  A)
                  \[{{F}^{-}}\]        done clear
  B)
                  \[C{{l}^{-}}\] done clear
  C)
                  \[B{{r}^{-}}\]      done clear
  D)
                  \[{{I}^{-}}\] done clear
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• question_answer15)
  A solution of sulphur dioxide in water reacts with \[{{H}_{2}}S\] precipitating sulphur. Here sulphur dioxide acts as [NCERT 1980]
  A)
                  As oxidising agent            done clear
  B)
                  A reducing agent done clear
  C)
                  An acid done clear
  D)
                  A catalyst done clear
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• question_answer16)
  Which of these substances is a good reducing agent [NCERT 1979; CPMT 1988]
  A)
                  \[NaOCl\]            done clear
  B)
                  \[HI\] done clear
  C)
                  \[FeC{{l}_{3}}\] done clear
  D)
                  \[KBr\] done clear
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• question_answer17)
  The strongest reducing agent is [MNR 1982]
  A)
                  \[HN{{O}_{2}}\]                done clear
  B)
                  \[{{H}_{2}}S\] done clear
  C)
                  \[{{H}_{2}}S{{O}_{3}}\]  done clear
  D)
                  \[SnC{{l}_{2}}\] done clear
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• question_answer18)
  Which one is an oxidising agent [DPMT 1996]
  A)
                  \[FeS{{O}_{4}}\] done clear
  B)
                  \[HN{{O}_{3}}\] done clear
  C)
                  \[FeS{{O}_{4}}.{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.6{{H}_{2}}O\] done clear
  D)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
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• question_answer19)
  In which of the following reactions \[{{H}_{2}}{{O}_{2}}\]is a reducing agent [CPMT 1981; NCERT 1981; BHU 1999]
  A)
                  \[2FeC{{l}_{2}}+2HCl+{{H}_{2}}{{O}_{2}}\,\to \,2FeC{{l}_{3}}+2{{H}_{2}}O\] done clear
  B)
                  \[C{{l}_{2}}+{{H}_{2}}{{O}_{2}}\,\,\to \,\,2HCl+{{O}_{2}}\] done clear
  C)
                  \[2HI+{{H}_{2}}{{O}_{2}}\,\to \,\,2{{H}_{2}}O+{{I}_{2}}\] done clear
  D)
                  \[{{H}_{2}}S{{O}_{3}}+{{H}_{2}}{{O}_{2}}\,\to \,\,{{H}_{2}}S{{O}_{4}}+{{H}_{2}}O\] done clear
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• question_answer20)
  When \[NaCl\] is dissolved in water the sodium ion becomes [NCERT 1976]
  A)
                  Oxidised              done clear
  B)
                  Reduced done clear
  C)
                  Hydrolysed         done clear
  D)
                  Hydrated done clear
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• question_answer21)
  Strongest reducing agent is         [MNR 1984, 89]
  A)
                  \[K\]      done clear
  B)
                  \[Mg\] done clear
  C)
                  \[Al\]     done clear
  D)
                  \[Br\] done clear
  E)
                  \[Na\] done clear
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• question_answer22)
  Which substance is serving as a reducing agent in the following reaction                 \[14{{H}^{+}}+C{{r}_{2}}O_{7}^{2-}+3Ni\to 2C{{r}^{3+}}+7{{H}_{2}}O+3N{{i}^{2+}}\] [CBSE PMT 1994; AFMC 2000; DPMT 2001]
  A)
                  \[{{H}_{2}}O\]   done clear
  B)
                  \[Ni\] done clear
  C)
                  \[{{H}^{+}}\] done clear
  D)
                  \[C{{r}_{2}}O_{7}^{2-}\] done clear
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• question_answer23)
  Which of the following acid possesses oxidising, reducing and complex forming properties           [MNR 1985]
  A)
                  \[HN{{O}_{3}}\]                done clear
  B)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  C)
                  \[HCl\]  done clear
  D)
                  \[HN{{O}_{2}}\] done clear
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• question_answer24)
  Which one is oxidising substance              [CPMT 1997]
  A)
                  \[{{C}_{2}}{{H}_{2}}{{O}_{2}}\]   done clear
  B)
                  \[CO\] done clear
  C)
                  \[{{H}_{2}}S\]    done clear
  D)
                  \[C{{O}_{2}}\] done clear
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• question_answer25)
  The compound that can work both as oxidising and reducing agent is      [CPMT 1986; MP PET 2000]
  A)
                  \[KMn{{O}_{4}}\]             done clear
  B)
                  \[{{H}_{2}}{{O}_{2}}\] done clear
  C)
                  \[Ba{{O}_{2}}\] done clear
  D)
                  \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] done clear
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• question_answer26)
  Which one is oxidising agent in the reaction  below                 \[2CrO_{4}^{2-}+2{{H}^{+}}\to C{{r}_{2}}O_{7}^{2-}+{{H}_{2}}O\]                             [CPMT 1997]
  A)
                  \[{{H}^{+}}\]      done clear
  B)
                  \[C{{r}_{2}}O_{4}^{-}\] done clear
  C)
                  \[C{{r}^{++}}\] done clear
  D)
                  None of these done clear
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• question_answer27)
  Which is the best description of the behaviour of bromine in the reaction given below                 \[{{H}_{2}}O+B{{r}_{2}}\to HOBr+HBr\] [CBSE PMT 2004]
  A)
                  Oxidised only done clear
  B)
                  Reduced only done clear
  C)
                  Proton acceptor only done clear
  D)
                  Both oxidised and reduced done clear
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• question_answer28)
  What is the oxidising agent in chlorine water [JEE Orissa 2004]
  A)
                  \[HCl\]  done clear
  B)
                  \[HCl{{O}_{2}}\] done clear
  C)
                  \[HOCl\]               done clear
  D)
                  None of these done clear
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• question_answer29)
  In the reaction                 \[A{{g}_{2}}O+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}\], the \[{{H}_{2}}{{O}_{2}}\] acts as [BHU 2004]
  A)
                  Reducing agent done clear
  B)
                  Oxidising agent done clear
  C)
                  Bleaching agent done clear
  D)
                  None of the above done clear
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• question_answer30)
  In the reaction                 \[HAs{{O}_{2}}+S{{n}^{2+}}\to As+S{{n}^{4+}}+{{H}_{2}}O\] oxidising agent is [BVP 2004]
  A)
                  \[S{{n}^{2+}}\]  done clear
  B)
                  \[S{{n}^{4+}}\] done clear
  C)
                  \[As\]    done clear
  D)
                  \[HAs{{O}_{2}}\] done clear
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• question_answer31)
  Which of the following substances acts as an oxidising as well as a reducing agent             [UPSEAT 2004; DCE 2004]
  A)
                  \[N{{a}_{2}}O\] done clear
  B)
                  \[SnC{{l}_{2}}\] done clear
  C)
                  \[N{{a}_{2}}{{O}_{2}}\]  done clear
  D)
                  \[NaN{{O}_{2}}\] done clear
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• question_answer32)
  In the reaction                 \[P+NaOH\to P{{H}_{3}}+Na{{H}_{2}}P{{O}_{2}}\]            [MP PET 2004]
  A)
                  P is oxidised only done clear
  B)
                  P is reduced only done clear
  C)
                  P is oxidized as well as reduced done clear
  D)
                  \[Na\] is reduced done clear
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