Transition metals Questionbank

To increase the activation energy ($E_{\text{a}}$) of the reaction

To permanently bond the reactants to the metal surface

To change the overall enthalpy change ($\Delta H$) of the reaction

To weaken the chemical bonds within the reactant molecules

Electrons in the $4\text{s}$ subshell are lost before the $3\text{d}$ electrons.

Electrons in the $3\text{d}$ subshell are lost before the $4\text{s}$ electrons.

Electrons are lost from the $3\text{p}$ subshell before the $4\text{s}$ electrons.

Electrons from the $4\text{s}$ and $3\text{d}$ subshells are always lost simultaneously.

$\text{MnO}_2$

$\text{Fe}$

$\text{Ni}$

$\text{V}_2\text{O}_5$

Heterogeneous catalysis

Enzymatic catalysis

Homogeneous catalysis

Autocatalysis

$\text{H}_2\text{O}$

$\text{NH}_3$

$\text{CN}^-$

$\text{Cl}^-$

$\text{C}_2\text{O}_4^{2-}$ is a neutral bidentate ligand

$\text{NH}_3$ is a neutral monodentate ligand

$\text{EDTA}^{4-}$ is a negatively charged bidentate ligand

$\text{H}_2\text{O}$ is a negatively charged monodentate ligand

$[\text{Ar}] 3\text{d}^{5} 4\text{s}^{2}$

$[\text{Ar}] 3\text{d}^{5} 4\text{s}^{1}$

$[\text{Ar}] 3\text{d}^{6} 4\text{s}^{0}$

$[\text{Ar}] 3\text{d}^{4} 4\text{s}^{2}$

Manganese(IV) oxide ($\text{MnO}_{2}$)

Iron ($\text{Fe}$)

Vanadium(V) oxide ($\text{V}_{2}\text{O}_{5}$)

Nickel ($\text{Ni}$)

True

False

$+1$

$+2$

$+4$

$+3$