Embibe Experts Solutions for Chapter: d-Block Elements, Exercise 2: Exercise 2

The atomic numbers of vanadium $\left(\mathrm{V}\right),$ chromium $\left(\mathrm{Cr}\right),$ manganese $\left(\mathrm{Mn}\right)$ and iron $\left(\mathrm{Fe}\right)$ are $23, 24, 25,$ and $26$, respectively. Which one of these may be expected to have the highest second ionization enthalpy?

(Atomic numbers: $\mathrm{Ti}=22, \mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28$). The colourless species are

Titanium shows a magnetic moment of $1.73 \mathrm{B}.\mathrm{M}.$ in its compound. What is the oxidation number of $\mathrm{Ti}$ in the compound?

Of the ions ${\mathrm{Zn}}^{2+}, {\mathrm{Ni}}^{2+}$ and ${\mathrm{Cr}}^{3+}$,
(Atomic number of $\mathrm{Zn}=30, \mathrm{Ni}=28 \text{and} \mathrm{Cr}=24$)

Which of the following groups contain coloured ions?
$\begin{array}{cc}1. {\mathrm{Cu}}^{2+}& 2. {\mathrm{Ti}}^{4+}\\ 3. {\mathrm{Co}}^{2+}& 4. {\mathrm{Fe}}^{2+}\end{array}$

Which one of the following pairs of ions have the same electronic configuration?

A compound of a metal ion, ${\mathrm{M}}^{\mathrm{x}+}(\mathrm{Z}=24)$, has a spin only magnetic moment of $\sqrt{15}$ Bohr Magnetons. The number of unpaired electrons in the compound is

Mercury is the only metal which is liquid at $0°\mathrm{C}.$ This is due to its