Chemical Properties of Group 16 Elements

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

Which of the following statements are correct?
a) All elements of group $16$ form their hydrides.
b) The bond angles of ${\mathrm{H}}_2\mathrm{O}$ and ${\mathrm{H}}_2\mathrm{S}$ are $104°{28}^{\text{'}}$ and $92°{30}^{\text{'}},$ respectively.
c) Dry ${\mathrm{SO}}_2$ is a reducing agent.
d) Pyrosulphuric acid is ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_7$.

Oxygen exhibit $- 1$ oxidation state in:

Maximum covalency of sulphur is:

Which one has lowest boiling point?

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

Which of the following is incorrect?

Which element of chalcogens has maximum tendency to show catenation ?

What is the oxide that formed during the rusting of iron ?

What is the nature of metal oxides ?

Which oxide is formed when sodium burns in the air ?

What is the nature of magnesium oxide ?

The number of $\mathrm{S}-\mathrm{S}$ bonds in sulphur trioxide trimer ${\mathrm{S}}_3{\mathrm{O}}_9$ is

 

Most volatile hydride of element of group$16$ is

${\mathrm{SF}}_4$ molecule has _____ geometry.

$$$\mathrm{HCOOH}$ reacts with conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ to produce

Oxygen molecule shows:

Acidity of diprotic acids in aqueous solutions increases in the order :