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Redox Reactions...

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  • Question 1
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    Q. As2S3 (yellow precipitate) is soluble in cone. HNO3 as given in unbalanced equation

    Equivalent weight in terms of molar mass M of As2S3 is

     

  • Question 2
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    In the following reaction, 2H2S(g) + SO2(g) → 3S(S) + 2H2O (l) One equivalent of H2S (g)will reduce

  • Question 3
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    Which has maximum number of equivalents per mole of the oxidant?

  • Question 4
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    Equivalent weight of H3PO2 in a reaction is found to be half of its molecular weight. It can be due to its

  • Question 5
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    KMnO4 (purple) is reduced to K2MnO4 (green) by in basic medium. 1 mole of KMnO4 is reduced by

  • Question 6
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    Equivalent weight of K2Cr2O7 in the following reaction is

    (M = molar mass of K2Cr2O7)

  • Question 7
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    In the following disproportionation of Cl2 in basic medium Cl2 + 2KOH → KCl + KClO + H2O  equivalent mass of Cl2 is

  • Question 8
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    One mole of CaOCI2 is dissolved in water and excess of Kl added. Hypo (Na2S2O3) required to react oxidised part completely is

  • Question 9
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    Consider conversion of MnCI2 into

          
    Increasing order of equivalent weights of MnCI2 in these conversions is

  • Question 10
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    The equivalent weight of MnSO4 is half of its molecular weight when it converts to

  • Question 11
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    The number of moles of KMnO4 that will be needed to react with one mole of ferrous sulphite in acidic solution is

  • Question 12
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    The number of moles of K2Cr2O7 that will be needed to react completely with one mole of ferric sulphite in acidic medium is

  • Question 13
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    Photosynthesis of carbohydrates in plants takes place as

    6CO2 +12H2O   C6H12O6 + 6O2 + 6H2O

    Equivalent weight of CO2 and C6H12O6 respectively are 

  • Question 14
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    Equivalent weight of C6H5CHO is equal to molar mass in the following reaction.

    Thus, species {A) is 

  • Question 15
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    Equivalent w eight of KMnO4 and its reduced species in different mediums are given


     

  • Question 16
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    Which is chlorate (I) ion

  • Question 17
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    Which of the following is not an example of redox reaction?

     

  • Question 18
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    NaHC2O4 is neutralised by NaOH and can also be oxidised by KMnO4 (in acidic medium). Equivalent weight is related to m olecular w eight (M) of NaHC2O4 in these two reactions as

  • Question 19
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    Direction (Q. Nos. 19-20) This section contains a paragraph, wach describing theory, experiments, data etc. three Questions related to paragraph have been given.Each question have only one correct answer among the four given options (a),(b),(c),(d)

    Current fuel cells use the reaction of H2(g) and O2(g) to form H2O (/). Often the H2(g)is obtained by steam reforming of a hydrocarbon, such as

    A future possibility is a fuel cell that converts a hydrocarbon such as propane directly to CO2(g) and H2O (/)

    Q. Difference in equivalent weights of C3H8 based on I and II is

  • Question 20
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    Current fuel cells use the reaction of H2(g) and O2(g) to form H2O (/). Often the H2(g)is obtained by steam reforming of a hydrocarbon, such as

    A future possibility is a fuel cell that converts a hydrocarbon such as propane directly to CO2(g) and H2O (/)

    Q. Select the correct statements about reaction II taking place in acidic medium.

  • Question 21
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    Choice the correct combination of elements and column I and coloumn II are given as option (a), (b), (c) and (d), out of which ONE option is correct.

    Q. Match the reactions of H3PO3 (m olar mass = M)in Column I with the corresponding equivalent mass of H3PO3 in Column II


     

  • Question 22
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    Direction (Q. Nos. 22 and 23) This section contains 2 questions. when worked out will result in an integer from 0 to 9 (both inclusive)

    Q. How many moles of are formed per mole of Mn2+ reacted in the following reaction?

     

  • Question 23
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    In certain laboratory process, it is necessary to remove ions from solution by heating with HNO3. Calculate the moles of HNO3 required by 1 mole of (NH4)2SO4

     

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