Sulphur Dioxide: Preparation, Structure, Properties and Uses

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

Which of the following will not be obtained when ${\mathrm{S}\mathrm{O}}_2$  is mixed with water:

${\mathrm{SO}}_2$ acts as a bleaching agent in presence of moisture. This is due to the _____  nature of ${\mathrm{SO}}_2$. (reducing / oxidising)

Which of the following is used as disinfectant?

What happens when ${\mathrm{SO}}_2$ is passed through water?
 

Sulphur dioxide is the more powerful reducing agent in an alkaline medium than in an acidic medium. Why?

Complete the following chemical equation:

${\mathrm{Fe}}^{3+}+ {\mathrm{SO}}_2 + {\mathrm{H}}_2\mathrm{O} \stackrel{ }{\to }$

A gas that can not be collected over water is

Name the acid formed when sulphur dioxide dissolves in water.

When ${\mathrm{SO}}_2$ is passed through acidified ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$

Explain, the structure of ${\mathrm{SO}}_2$ molecule.
 

How is sulphur dioxide manufactured?
 

Explain, the nature of $\mathrm{S}-\mathrm{O}$ bond in ${\mathrm{SO}}_2$

Comment upon the nature of two $\mathrm{S}-\mathrm{O}$ bonds formed in ${\mathrm{SO}}_2$ molecule. Are the two $\mathrm{S}-\mathrm{O}$ bond in this molecule equal.

What happens when sulphur dioxide is passed into aqueous solution of $\mathrm{Fe}\left(\mathrm{III}\right)$ salt ?

How is ${\mathrm{SO}}_2$ an air pollutant?

 ${\mathrm{SO}}_2$ bleaches substances due to

The number of reactions that give ${\text{SO}}_{\text{2}}$ gas:

$\text{(a)}\text{Cu}\text{+}\text{conc}{\text{. H}}_{\text{2}}{\text{SO}}_{\text{4}}\to$

$\text{(b) Zn}\text{+}\text{dil}{\text{.H}}_{\text{2}}{\text{SO}}_{\text{4}}\to$

$\text{(c) S}+{\text{H}}_2{\text{SO}}_4\to$

${\text{(d) FeS}}_{\text{2}}\text{+}{\text{O}}_{\text{2}}\to$

${\text{(e) NaHSO}}_{\text{3}}\text{+}\text{dil}{\text{.H}}_{\text{2}}{\text{SO}}_{\text{4}}\to$

$\text{(f)}{\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{+}{\text{PCl}}_{\text{5}}\to$

The acid obtained  when ${\mathrm{S}\mathrm{O}}_2$  is mixed with water is:

When $H_{2}S$ is passed through in II group sometimes solution becomes milky. It indicates the presence of