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

(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

In the extraction of silver from the argentite ore, the ore is treated with a dilute solution of $\mathrm{NaCN}$ in water, in the presence of $\mathrm{Y}$. Whereby the following reaction takes place:
${\mathrm{Ag}}_2\mathrm{X}+4\mathrm{NaCN}+2\mathrm{Y}\to 2\mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN}{)}_2\right]+{\mathrm{Na}}_2{\mathrm{XO}}_4$. $\mathrm{X}$ and $\mathrm{Y}$ in this reaction are