The chloride of which of the following elements is coloured?

Zinc does not show variable valency like $d-$block elements because

Which of the following options represents the increasing order of the paramagnetic property of the ions?

Those elements whose two outermost orbitals are incompletely filled with electrons are known as:

Consider $n$ as the number of lone pairs of electrons present in the equatorial position of the most stable structure of $ClF_3$. The ions from the following with $n$ number of unpaired electrons are :
$A. V^{3+}$
$B. Ti^{3+}$
$C. Cu^{2+}$
$D. Ni^{2+}$
$E. Ti^{2+}$
Choose the correct answer from the options given below :

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition elements which shows the highest magnetic moment.