Consider the following elements $In$,$Tl$,$Al$,$Pb$,$Sn$ and $Ge$. The most stable oxidation states of elements with highest and lowest first ionisation enthalpies,respectively,are

Fluorine,chlorine,bromine and iodine are placed in the same group $(17)$ of the periodic table,because

Match List-$I$ with List-$II$:

List-$I$ (Atomic Number)	List-$II$ (Block of periodic table)
$A$. $37$	$I$. $p$-block
$B$. $78$	$II$. $d$-block
$C$. $52$	$III$. $f$-block
$D$. $65$	$IV$. $s$-block

Choose the correct answer from the options given below:

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

State whether the following statements are true or false:
$(i)$ Higher the ionization enthalpy,lower the screening effect.
$(ii)$ The ionization enthalpy of $Be$ is higher than that of $B$.
$(iii)$ The shielding effect increases as we move from left to right in a period.
$(iv)$ The increasing order of the first ionization energy is $B < Be < O < N$.

Count the number of properties which have higher value for '$O$' atom than that of '$S$': Ionisation potential, Electron affinity, Covalent radius, Electronegativity.