1.

The atomic number of vanadium `(V)`, chromium `(Cr)`, manganese `(Mn)` and iron `(Fe)` are respectively `23,24,25,26`. Which out of these may be expected to have the jump in second ionisation enthalpy?A. (a)`Mn`B. (b)`Fe`C. (c )`V`D. (d)`Cr`

Answer» Correct Answer - D
`Cr` has `3d^(5), 4s^(1)` configuration and thus second electron is removed from 3d-subshell. Rest all from 4s-subshell.


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