Embibe Experts Solutions for Chapter: The d- and f-Block Elements, Exercise 4: Exercise 4

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

Magnetic moment $2.84 \mathrm{B}.\mathrm{M}$. is given by ______. (At. Numbers: $\mathrm{Ni}=28, \mathrm{Ti}=22, \mathrm{Cr}=24, \mathrm{Co}=27$)

Which of the following pairs has the same size?

The highest value of the calculated spin-only magnetic moment (in $\mathrm{BM}$) among all the transition metal complexes is:

The pair of metal ions that can give a spin-only magnetic moment of $3.9 \mathrm{BM}$ for the complex $\left[\mathrm{M}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{Cl}}_2$ is:

The "spin-only" magnetic moment [in units of Bohr magneton, [$\mathrm{\mu }$] of ${\mathrm{Ni}}^{2+}$ in an aqueous solution would be $(\text{Atomic number of} \mathrm{Ni}=28)$:

Which of the following factors may be regarded as the main cause of lanthanoid contraction?

The amount of oxalic acid present in a solution can be determined by its titration with ${\mathrm{KMnO}}_4$ solution in the presence of ${\mathrm{H}}_2{\mathrm{SO}}_4$. The titration gives unsatisfactory result when carried out in the presence of $\mathrm{HCl}$, because $\mathrm{HCl}$