Calculate the oxidation number of phosphorus in the following species.
\({ HPO }_{ 3 }^{ 2- }\)

2

(a)

The aqueous solution of sugar does not conduct electricity.However, when sodium chloride is added to water, it conducts electricity.How will you explain in this statement on the basis of ionisation and how is it affected by concentration of sodium chloride?

2

(a)

The concentration of hydrogen ion in  a sample of soft drink is 3.8 x 10^-3 M.What is its pH?

2

(a)

Why does fluorine not show disproportionation reaction?

2

(a)

The reaction
\(v{ Cl }_{ 2 }(g)+2{ OH }^{ - }(aq)\longrightarrow { ClO }^{ - }(aq)+{ Cl }^{ - }(aq)+{ H }_{ 2 }O(l)\)
represents the process of bleaching. Identify and name the species that bleaches the substances due to its oxidising action.
Write the oxidation number of each element above its symbol and then identify the bleaching reagent by observing the change in oxidation number.

2

(a)