Chemical Properties of Group 16 Elements

Magnetite is an example of _____.

Define mixed oxides.

Identify a neutral oxide from the following oxides.

What are acidic oxides? Write examples.

Define simple and mixed oxides and give two examples of each.

Classify the following oxides as acidic, basic and neutral.
${\mathrm{CO}}_2, {\mathrm{N}}_2\mathrm{O}, {\mathrm{Cl}}_2{\mathrm{O}}_7, \mathrm{MgO}, \mathrm{CO}, {\mathrm{Na}}_2\mathrm{O}$

Differentiate between simple and mixed oxides.

What are the different oxidation states of iron in its oxide ${\mathrm{Fe}}_3{\mathrm{O}}_4$.

Define simple and mixed oxides and give two examples of each.

Classify the following oxides as acidic, basic and neutral.
${\mathrm{SO}}_2, \mathrm{NO}, {\mathrm{Cl}}_2{\mathrm{O}}_7, \mathrm{CaO}, \mathrm{CO}, {\mathrm{Na}}_2\mathrm{O}$

What are the oxidation states of iron in its oxide ${\mathrm{Fe}}_3{\mathrm{O}}_4$.

Select a pair of amphoteric oxides from the following.

Among $\mathrm{C}, \mathrm{S}$ and $\mathrm{P}$, the element (s) that produce (s) ${\mathrm{SO}}_2$ on reaction with hot conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ is/are

Oxygen exhibit $- 1$ oxidation state in:

Maximum covalency of sulphur is:

Which one has lowest boiling point?

The structure of ${\mathrm{SF}}_4$ is

Define mixed oxide.

Which element of chalcogens has maximum tendency to show catenation ?

Sulphur and rest of the elements of group 16 are less electronegative than oxygen. Therefore, their atoms cannot take up electrons easily. They can acquire ns²np⁶ configuration by sharing two electrons with the atoms of other elements and thus, exhibit +2 oxidation state in their compounds. In addition to this, their atoms have vacant d-orbitals in their valence shell to which electrons can be promoted from the p and s-orbitals of the same shell. As a result, they can show +4 and +6 oxidation states.

Like sulphur, oxygen does not show +4 and +6 oxidation states. The reason is :