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`.

Options

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

Answer

B

Explanation

`Mn^(2+)` has half -filled d-subshell and more stable thud easily formed or ` E_(Mn^(3+)//Mn)^(2+) gt E_(Cr^(3+)//Cr^(2+)`.