The incorrect statement among the following is - Vidyadip

MCQ

The incorrect statement among the following is

A
The first ionisation potential of $Al$ is less than the first ionisation potential of $Mg$
✓
The second ionisation potential of $Mg$ is greater than the second ionisation potential of $Na$
C
The first ionisation potential of $Na$ is less than the first ionisation potential of $Mg$
D
The third ionisation potential of $Mg$ is greater than the third ionisation potential of $Al$

✓

Answer

Correct option: B.

The second ionisation potential of $Mg$ is greater than the second ionisation potential of $Na$

b
(b) $I.E.(II)$ of $Na$ is higher than that of $Mg$ because in case of $Na$, the second ${e^ - }$ has to be remove from the noble gas core while in case of $Mg$ removal of second ${e^ - }$ gives a noble gas core.

$Mg$ has high first ionisation potential than $Na$ because of its stable $n{s^2}$ configuration.

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