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STATEMENT 1 Corrosion of iron is essenti...

STATEMENT 1 Corrosion of iron is essentially an electrochemical phenomenon
STATEMENT 2 : Corrosion reaction at anode : `2Fe(s)rarr2Fe^(3+)+6e^(-)`
STATEMENT 3: Corrosion reaction at cathode : `O_(2)(g)+4H^(+)(aq)+4e^(-)rarr2_(2)O(l)`

A

TTT

B

TFT

C

TFF

D

FFT

Text Solution

Verified by Experts

The correct Answer is:
B
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Corrosion is essentially an electrochemical phenomenon. Explain the reactions occurring during corrosion of iron kept in an open atmosphere. (b) Calculate the equilibrium constant for the equilibrium reaction Fe_((s)) + Cd_((aq))^(2+) hArr Fe_((aq))^(2+) + Cd_((s)) (Given : E_(Cd^(2+)|Cd)^(@) = -0.40 V , E_(Fe^(2+)|Fe)^(@) = -0.44V ).

Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process. The iron rust is formed due to ………….. Reaction . Different regions on iron surface becomes anode and cathode. Reaction on anode region : Fe_((s))rarrFe^(2+_((aq)))+2e^(-) Reaction on cathode region : O_(2_((g)))+4H^(+_((aq)))+.......rarr2H_(2)O_((1)) When Fe^(2+) ions migrate from anode region they react with ......... to from Fe^(3+) ions. A reddish coloured hydrated oxide is formed from .......... ions . It is called rust . 2Fe^(3+_((aq)))+4H_(2)O_((1))rarr+..........+6H^(+_((aq))) A way to prevent rusting ...............

Knowledge Check

  • The reaction, 2H_(2)O_((l)) to 4H_((aq))^(+)+O_(2(g))+4e^(-) is

    A
    an oxidation reaction
    B
    a reduction reaction
    C
    a redox reaction
    D
    a hydrolysis reaction

  • In the reaction 4Fe+3O_(2)rarr4Fe^(3+)+6O^(2-) Which of the following statements is incorrect?

    A
    it is a redox reaction
    B
    metallic iron acts as a reducing agent
    C
    `O_(2)` acts as an oxidising agent
    D
    metallic iron is reduced to `Fe^(3+)`

  • E^(o) for the reaction Fe + Zn^(2+) rarr Zn + Fe^(2+) is – 0.35 V. The given cell reaction is :

    A
    feasible
    B
    not feasible
    C
    in equilibrium
    D
    can't say anything

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    Explore conceptually related problems

    Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process. The rion rust is formed due to ______ reaction. Different regions on iron surface become anode and cathde. Reaction on anode region : Fe_((s)) to Fe_((aq))^(2+) + 2e^(-) Reaction on cathode region. O_(2(g)) + 4H^(+)_((aq)) + ________ to 2H_(2)O_((l)) When Fe^(2+) ions migrate from anode region they react with _______ to form Fe^(3+) ions. A reddiush coloured hydrated oxide is formed from ______ ions. It is called rust. 2Fe^(3+)_((aq)) + 4H_(2)O((l)) to _______ + 6H^(+)_((aq)) A way to prevent rusting ______

    Assertion (A): The rusting on the surface of iron involves following reaction : a. Fe(s) rarr Fe^(2+)(aq)+2e^(-) ( at anodic site ) b. O_(2)(g) +4H^(o+)(aq)+4e^(-) rarr 2H_(2)O(l) ( at cathodic site ) c. 4Fe^(2+)(aq)+O_(2)(g) +4H_(2)O(l) rarr 2Fe_(2)O_(3)(s)+8H^(o+) d.Fe_(2)O_(3)(aq)+xH_(2)O(l) rarr Fe_(2)O_(3).xH_(2)O Reason (R) : Rusting is accelerated in the presence of NaCl and CO_(2)

    In the electrochemical reaction, 2Fe^(3+)+Zn rarr Zn^(2+) + 2Fe^(2+) , increasing the concentration of Fe^(2+) :

    In the context of the reaction, 4Fe+3O_(2)rarr4Fe^(3+)+6O^(2-) , which of the following statements is // are correct?

    In the reaction 4Fe+3O_2rarr4Fe^+3+6[O^-2] which of the following statements is correct?

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