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The correct statements among the following are:

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Chromium and copper have high ionization energy values than those of their neighbours Mn and Zn respectively

The value of second ionization energy of Zn is lower than that of copper

The third ionization energy of Mn is very high

$M n^{4 +}$ is more stable than $M n^{2 +}$

answer is B, C.

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Detailed Solution

Because of Cr & Cu having half filled & completely filled d-sub shell their I.E values are high

$\to I . E_{2}$ of Zn is not lower than Cu because of $C u^{+ 1}$ is stable

$\to I . E_{3}$ of Mn is very high because of half filled d- sub shell

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