General Properties of d-Block Elements

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

Both ${\mathrm{Cr}}^{2+}$ and ${\mathrm{Mn}}^{3+}$have ${\mathrm{d}}^4$ configuration. Which one of the following is true?

Which of the following set of transition metals have high volatility?

The oxidising ability of the given anions follows the order

Which of the following compounds is expected to be colored?

Which of the following statements holds true for $\mathrm{Cu}\left(\mathrm{I}\right)$ and $\mathrm{Cu}\left(\mathrm{II}\right)$ complexes ?

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

Which of the following are the transition metal ions responsible for colour in ruby and emerald respectively?

Find the metallic and ferromagnetic substance.

The melting point of copper is high because:

Which out of the following can act as a best reducing agent?

The colour and magnetic nature of manganate ion $\left(\text{M}\text{n}{\text{O}}_4^{{\mathrm{2-}}_{}}\right)$ is-

Which forms interstitial compounds?

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

Which of the following statements is incorrect?

Which of the following compound is expected to show similar magnetic behavior?

(Atomic no. of$\mathrm{Fe}$ is $26, \mathrm{Cu}$ is $29, \mathrm{V}$ is $23, \mathrm{Mn}$ is $25$)