Important Compounds of Group 16 Elements

The general formula for polythionic acid series is ${\mathrm{S}}_{\mathrm{n}}{\left({\mathrm{SO}}_3\mathrm{H}\right)}_2$, where $\mathrm{n}=3$ to $6.$ What is the value of $\mathrm{n}$ for pentathionic acid acid?

Compare the bond angles is water$\left({\mathrm{H}}_2\mathrm{O}\right)$  and hydrogen sulphide $\left({\mathrm{H}}_2\mathrm{S}\right)$.

Calculate the hybridisation of ${\mathrm{H}}_2\mathrm{S}$.

Explain the procedure of preparation of hydrogen sulphide gas.

Why concentrated sulphuric acid is not used as a drying agent during drying of hydrogen sulphide?

Write the reaction between $\mathrm{FeS}$ with ${\mathrm{H}}_2{\mathrm{SO}}_4$.

In how many of the following cases, hydrogen peroxide is obtained on hydrolysis?

Caro's acid, Marshall's acid, ${\mathrm{XeF}}_6$ in alkaline medium,

${\mathrm{TeF}}_6, {\mathrm{SOCl}}_2, {\mathrm{SO}}_2{\mathrm{Cl}}_2,{ \mathrm{N}}_2{\mathrm{O}}_5, {\mathrm{SiF}}_4, {\mathrm{BCl}}_3$

Which of the following statements are correct for the ${\mathrm{SO}}_4^{2-}$ ion ?

The hydrolysis of $1\mathrm{mol}$ of peroxodisulphuric acid produces :-

Platinised asbestos or vanadium pentoxide is used as a catalyst in the oxidation of sulphur dioxide in the contact process.

Sulphur dioxide into sulphur trioxide is carried out in presence of a _____ having a target contact surface.

Name the catalyst used in the oxidation of sulphur dioxide in the contact process.

How did the name of the contact process is derived?

Explain the use of sulphur dioxide in the contact process?

When a flower bleached by _____ is brought in contact with air and light the colour of the flower is restored.(sulphur dioxide/carbon dioxide)

The catalyst used in the preparation of oxygen from hydrogen peroxide is _____. (Manganese dioxide / Calcium oxide)

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

On addition of concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ to a chloride salt, colourless fumes are evolved but in case of an iodide salt, violet fumes come out. This is because

Moist hydrogen cannot be dried over concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ because it:

Concentrated sulphuric acid containing 100% dissolved ${\mathrm{SO}}_3$ is known as sulphan.