Home
Class 12
CHEMISTRY
Assertion: E^(ɵ) for (Mn^(3+))/(Mn^(2+))...

Assertion: `E^(ɵ)` for `(Mn^(3+))/(Mn^(2+))` is more positive than for `(Cr^(3+))/(Cr^(2+))`.
Reason: The third ionisation energy of Mn is larger than that of Cr.

Text Solution

Verified by Experts

R is the correct explanation ofA.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise IMPORTANT QUESTIONS|30 Videos

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise ASSERTION-REASON TYEP QUESTIONS(TYPE 1)|7 Videos

  • CORDINATION COMPOUNDS

    PRADEEP|Exercise Important Questions|28 Videos

  • ELECTROCHEMISTRY

    PRADEEP|Exercise IMPORTANT QUESTIONS FOR BOARD EXAMINATION|25 Videos

Similar Questions

Explore conceptually related problems

Give reasons : (a) E^(@) value for Mn^(3+)//Mn^(2+) couple is much more positive than that for Fe^(3+)//Fe^(2+) . (b) Iron has higher enthalpy of atomisation than that of copper. ( c ) Sc^(3+) is colourless in aqueous solution whereas Ti^(3+) is coloured.

Give reasons: E^0 value for Mn^(3+)//Mn^(2+) couple is much more positive than that for Fe^(3+)//Fe(2+) .

Knowledge Check

  • Assertion: E^(@) for Mn^(3+)//Mn^(2+) is more positive than Cr^(3+)//Cr^(2+) Reason: The third ionisation energy of Mn is larger than that of Cr .

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If the assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If assertion is false but reason is true.

  • Assertion : E^@ value of Mn^(3+) | Mn^(2+) is more positive than for Cr^(3+)| Cr^(2+) . Reason Cr^(3+) is more stable than Cr^(2+) but Mn^(3+) is less stable than Mn^(2+) .

    A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
    B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
    C
    Assertion is correct statement but reason is wrong statement.
    D
    Assertion is wrong statement but reason is correct statement

  • Assertion : Reduction potential of Mn ( + 3 to + 2) is more positive than that of Fe ( + 3 to + 2). Reason : Ionisation potential of Mn is more than that of Fe.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion.
    B
    If both assertion and reason are correct but reason is not correct not correct explanation for assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    If both assertion and reason are incorrect.

    • Similar Questions

    Explore conceptually related problems

    Why is the E^(@) values for Mn^(3+)//Mn^(2+) couple much more positive than for Cr^(3+) // Cr^(2+) or Fe^(3+)//Fe^(2+)

    Why is the value for (Mn^(3+))/(Mn^(2+)) couple much more positive than that for (Cr^(3+))/(Cr^(2+)) or (Fe^(3+))/(Fe^(2+)) ? Explain

    Wxplain why E^(@) for Mn^(3+)//Mn^(2+) couple is more positive than that for Fe^(3+)//Fe^(2+) (At. Nos. Mn=25,Fe=26)?

    Assign reasons for the following : (i) The enthalpies of atomisation of transition elements are high. (ii) The transition metals and many of their compounds act as good catalyst. (iii) From element to element the actinoid contraction is greater than the lanthanoid contraction. (iv) The E^(@) value for the Mn^(3+)//Mn^(2+) couple is much more positive than that for Cr^(3+)//Cr^(2+) . (v) Scandium (Z = 21) does not exhibit variable oxidation states and yet it is regarded as transition element.

    The correct order of decreasing third ionisation enthalpy of Ti, V, Cr, Mn is :

    Home
    Profile