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Redox Reactions...

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  • Question 1
    1 / -0

    In the reaction, $$4Fe+{ 3O }_{ 2 }\rightarrow { 4Fe }^{ 3+ }+{ 6O }^{ 2- } $$ which of the following statement is incorrect?

  • Question 2
    1 / -0

    Which of the following statements is wrong?

  • Question 3
    1 / -0

    Given the standard half-cell potentials $$(E^o)$$ of the following as


    $$Zn=Zn^{2+}+2e^-$$;             $$E^o=+0.76$$V
    $$Fe=Fe^{2+}+2e^{-}$$;              $$E^o=+0.41$$V

    Then the standard e.m.f. of the cell with the reaction $$Fe^{2+}+Zn\rightarrow Zn^{2+}+Fe$$ is?

  • Question 4
    1 / -0

    In the chemical reaction
    $${ K }_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 }+x{ H }_{ 2 }{ SO }_{ 4 }+y{ SO }_{ 4 }\longrightarrow { K }_{ 2 }{ SO }_{ 4 }+{ Cr }_{ 2 }{ \left( { SO }_{ 4 } \right)  }_{ 3 }+z{ H }_{ 2 }O$$
    Values of x, y and z are:

  • Question 5
    1 / -0

    The values of coefficients to balance the following reaction are:
    $$Cr(OH)_3 + ClO^- + OH^- \rightarrow Cr{ O }_{ 4 }^{ 2- } + Cl^- +H_2O$$?

  • Question 6
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    Match the column I with column II with the type of reaction and mark the appropriate choice. 

    Column IColumn II
    $$(A)$$$$3Mg_(s) + N_{2(g)}\xrightarrow{\Delta  } Mg_3N_{2(s)}$$$$(i)$$Displacement
    $$(B)$$$$NaH_(s) + H_2O_(l)\rightarrow NaOH_{(aq)} + H_{2(g)}$$
    		$$(ii)$$Decomposition
    $$(C)$$$$3Cl{ O }_{( aq) }^{ - }\rightarrow 2C{ l}_{( aq) }^{ - } + Cl{ O_3 }_{ (aq) }^{ - }$$$$(iii)$$Combination
    $$(D)$$$$2KClO_{3(s)}\rightarrow 2KCl_(s) + 3O_{2(g)}$$ $$(iv)$$Disproportionation

  • Question 7
    1 / -0

    Which of the following species has an atom with $$+6$$ oxidation state?

  • Question 8
    1 / -0

    Arrange the oxides of nitrogen in increasing order of oxidation state of $$N$$ from +1 to +5:

  • Question 9
    1 / -0

    Fill up the table from the given choice.

    ElementOxidation number
    Oxygen-2 in most compounds ____(i) in $$H_2O_2$$ and _____(ii) in $$ OF_2$$
    Halogen-1 for_____(iii) in all its compounds
    Hydrogen_____(iv) in most of its compounds ______(v)in binary metallic hydrides
    Sulphur______(vi) in all sulphides

  • Question 10
    1 / -0

    What will be the balanced equation in acidic medium for the given reaction ?
    $$Cr_2{ O }_{ 7(aq) }^{ 2- } + SO_2{(g)} \rightarrow C{ r }_{ (aq) }^{ 3+ } + S{ O }_{ 4(aq) }^{ 2- }$$  

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