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Redox Reactions...

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  • Question 1
    4 / -1

    The electron releasing tendency of the metals, zinc, copper and silver is in the order:

  • Question 2
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    In Daniell cell, direction of current is

  • Question 3
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    The oxidation number of hydrogen in LiH, NaH and CaH2 is

  • Question 4
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    Which of the following electrodes will act as anodes, when connected to Standard Hydrogen Electrode?

     

  • Question 5
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    A metal in a compound can be displaced by another metal in the uncombined state. Which metal is a better reducing agent in such a case?

  • Question 6
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    In the reaction of metallic cobalt placed in nickel sulphate solution, therein is a competition for release of electrons At equilibrium, chemical tests reveal that both Ni+2 (aq) and Co+2 (aq) are present at moderate concentrations. The result is that:

  • Question 7
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    The flow of current is possible in Daniel cell only

  • Question 8
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    Chlorine, bromine and iodine when combined with oxygen, have oxidation numbers

  • Question 9
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    The decomposition of hydrogen peroxide to form water and oxygen is an example of

  • Question 10
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    Hydrogen is prepared from H2O by adding

  • Question 11
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    Oxidation number denotes the oxidation state of an element in a compound ascertained on the basis that electron in a covalent bond belongs

  • Question 12
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    In oxygen difluoride (OF2) and dioxygen difluoride(O2F2), the oxygen is assigned an oxidation number of

  • Question 13
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    The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following rules is not correct in this respect?

  • Question 14
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    Identify the correct statements with reference to the given reaction 

  • Question 15
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    In the conversion of Br2 to Bro3- , the oxidation number of Br changes from

  • Question 16
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    The highest value of oxidation number changes from 1 to 7

  • Question 17
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    Oxidation number of 1/2 is assigned to oxygen atom in

  • Question 18
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    The more positive the value of E0, the greater is the tendency of the species to get reduced. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent. 

    E0values : Fe3 + / Fe2+ = +0.77; I2(s)/l- = +0.54; cu2+/ Cu = +0.34; Ag+ / Ag = +0.80V

     

  • Question 19
    4 / -1

    The electron releasing tendency of the metals, zinc, copper and silver is in the order:

  • Question 20
    4 / -1

    In the reaction
    2H2O2 → 2H2O +O2

  • Question 21
    4 / -1

    The oxidation number of oxygen in most compounds is

  • Question 22
    4 / -1

    Assign oxidation number to P in NaH2PO4

  • Question 23
    4 / -1

    The oxidizing power of halogens increase in the order of

  • Question 24
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    Identify the correct statement (s) in relation to the following reaction:  Zn+ 2HCl → ZnCl2 +H2

  • Question 25
    4 / -1

    Consider the elements: Cs, Ne, I and F. Identify the element(s) that exhibits only negative oxidation state

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