General Properties of d-Block Elements

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

Explain why density of d−block elements increasing as we move down the group?

Explain why atomic volume of $\mathrm{d}-$block elements decreasing as we move down the group?

Complete the following catalytic mechanism,

$$\begin{gathered} \_\_\_\_\_+ 2 {\mathrm{I}}^{-}\to \_\_\_\_\_ {\mathrm{Fe}}^{2+}+{\mathrm{I}}_2 \\ 2 {\mathrm{Fe}}^{2+}+{\mathrm{S}}_2{{\mathrm{O}}_8}^{2-}\to 2 {\mathrm{Fe}}^{3+} +\_\_\_\_\_ \end{gathered}$$

Write the catalytic mechanism of the reaction between iodide and persulphate ions.

When iron$\left(\mathrm{III}\right)$ catalyses the reaction between iodide and persulphate ions. Iron acts as a catalyst.

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 $25$)

Metals that are usually used as catalysts belong to

Which of the two have an almost similar size?

Which of the following oxide shows electrical properties like metals?

Transition elements show variable state oxidation because there is a very large energy difference in between $(\mathrm{n}-1)\mathrm{d}$ and $\mathrm{ns}$ orbitals.

The metal that is present in brass, bronze, and German silver is :

Lanthanoid contraction is the gradual decrease in the atomic and ionic size of Lanthanoids with a decrease in atomic number.

Lanthanoid contraction is the gradual decrease in the atomic and ionic size of Lanthanoids with a decrease in atomic number.

Which among the following elements is a soft element as compared to others