General Properties of d-Block Elements

The correct order of magnetic moments (spin only values in B.M.) among the species involved is

Which one of the following is most likely a mismatch?

For a metal ion, the calculated magnetic moment is $4.90 \mathrm{BM}$. This metal ion has _______ number of unpaired electrons

Which of the following statements are correct?

(A) The ${\mathrm{M}}^{3+}/{\mathrm{M}}^{2+}$ reduction potential for iron is greater than manganese.

(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion

(C) Aqueous solution of ${\mathrm{Cr}}^{2+}$ can liberate hydrogen from dilute acid

(D) Magnetic moment of ${\mathrm{V}}^{2+}$ is observed between $4.4-5.2 \mathrm{BM}$

Choose the correct answer from the options given below:

Which halogen is known to cause the reaction given below?

Consider the reaction:

${\mathrm{Cu}}^{2+}+{\mathrm{X}}^{-}\to {\mathrm{Cu}}_2{\mathrm{X}}_2+{\mathrm{X}}_2$

Find the product ${\mathrm{X}}_2$, that formed predominantly.

The melting point of ${\mathrm{Mn}}_4\mathrm{N}$ is 

Among the 3d-transition series, the $\mathrm{IE}$

The magnetic moment of ${\mathrm{Cr}}^{3+}$ is similar to

Statement-1: ${\mathrm{Fe}}^{3+}$ salts are less stable than ${\mathrm{Fe}}^{2+}$ salts.

Statement-2: ${\mathrm{Fe}}^{3+}$ ions are formed by loss of $\mathrm{s}$ and $\mathrm{d}$ electrons

The spin only magnetic moment of the complex present in Fehling's reagent is____$\mathrm{B}.\mathrm{M}.$(The nearest integer)

Out of the following, how many of them have magnetic moment value as $2\sqrt{12}\mathrm{BM}$?
${\mathrm{Mn}}^{2+},{\mathrm{Mn}}^{1+},{\mathrm{Re}}^{2+},{\mathrm{Re}}^{1+},{\mathrm{Te}}^{1+},\mathrm{Cr}, \mathrm{W}$

Select the correct reason for the melting point of $\mathrm{Zn}$ is lower as compared to those of the other elements of $3\mathrm{d}$ series.

Identify the incorrect statement from the following:

Which of the following statements is not correct?

How many of the following reactions are disproportionation reactions?

$\left(\mathrm{i}\right)$ ${\mathrm{Cu}}^{+}⟶{\mathrm{Cu}}^{2+}+\mathrm{Cu}$
$\left(\mathrm{ii}\right)$ $3{\mathrm{MnO}}_4^{-}+4{\mathrm{H}}^{+}⟶2{\mathrm{MnO}}_4^{-}+{\mathrm{MnO}}_2+2{\mathrm{H}}_2\mathrm{O}$
$\left(\mathrm{iii}\right)$ $2{\mathrm{KMnO}}_4⟶{\mathrm{K}}_2{\mathrm{MnO}}_4+{\mathrm{MnO}}_2+{\mathrm{O}}_2$
$\left(\mathrm{iv}\right)$ $2{\mathrm{MnO}}_4^{-}+3{\mathrm{Mn}}^{2+}+2{\mathrm{H}}_2\mathrm{O}⟶5{\mathrm{MnO}}_2+4{\mathrm{H}}^{+}$

Which of the following represents the incorrect order of property mentioned?

An element of $3\mathrm{d}-$transition series shows two oxidation states $\mathrm{x}$ and $\mathrm{y}$ differing by two units. Then compounds in oxidation state