In which of the following arrangements is the order $NOT$ according to the property indicated against it?

Which of the following points is never the same for $IP$ and $EA$?

Which one of the following sets of ions represents the collection of isoelectronic species?

Match the following properties in Column-$I$ with their correct trends in Column-$II$:

Column-$I$	Column-$II$
$A$. Ionisation potential	$P$. $O < F < N$
$B$. Electronegativity	$Q$. $N < O < F$
$C$. $Z_{eff}$	$R$. $O < N < F$
$D$. Electron affinity	$S$. $N < C < O$

Which of the following orders is correct for the property mentioned in brackets?

Consider the following four elements which are represented according to the long form of the periodic table. Here $W, Y$ and $Z$ are left,up and right elements with respect to the element $X$. $Y$ belongs to the $16^{th}$ group and $2^{nd}$ period. Then,according to the given information,identify the incorrect statement regarding the given elements.