Whenever a reaction between an oxidisina adent and a reducina aqent is carried out, a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess. J ustify this statement giving three illustrations. Justify the above statement with three examples.
Whenever a reaction between an oxidisina adent and a reducina aqent is carried out, a compound of lower oxidation state is formed if the reducing agent is in excess and a compound of higher oxidation state is formed if the oxidising agent is in excess. J ustify this statement giving three illustrations. Justify the above statement with three examples.

Solution:

When there is a response between lessening specialist and oxidizing specialist, a compound is framed which has lower oxidation number if the diminishing specialist is in abundance and a compound is shaped which has higher oxidation number if the oxidizing specialist is in overabundance.

(I) P_{4} and F_{2} are decreasing and oxidizing specialist individually.

In an overabundance measure of P_{4} is responded with F_{2}, then, at that point, P F_{3} would be created, where the oxidation no. of P is +3 .

P_{4 \text { (overabundance })}+F_{2} \rightarrow P F_{3}

Assuming P_{4} is responded with overabundance of F_{2}, P F_{5} would be delivered, where the oxidation no. of P is +5.

P_{4}+F_{2(\text { abundance })} \rightarrow P F_{5}

(ii) \mathrm{K} and \mathrm{O}_{2} goes about as a lessening specialist and oxidizing specialist individually.

On the off chance that an overabundance of \mathrm{K} responds with O_{2}, it produces \mathrm{K}_{2} \mathrm{O}. Here, the oxidation number of 0 is -2.

4 K_{(\text {excess })}+\mathrm{O}_{2} \rightarrow 2 \mathrm{~K}_{2} \mathrm{O}^{-2}

On the off chance that \mathrm{K} responds with an overabundance of O_{2}, it produces \mathrm{K}_{2} \mathrm{O}_{2}, where the oxidation number of \mathrm{O} is -1.

2 \mathrm{~K}+\mathrm{O}_{2}( overabundance ) \rightarrow \mathrm{K}_{2} \mathrm{O}_{2}^{-1}

(iii) \mathrm{C} and O_{2} goes about as a decreasing specialist and oxidizing specialist individually.

On the off chance that an overabundance measure of C is responded with inadequate measure of O_{2}, then, at that point, it produces C 0, where the oxidation

number of \mathrm{C} is +2.

C_{(\text {excess })}+\mathrm{O}_{2} \rightarrow \mathrm{CO}

In the event that \mathrm{C} is singed in abundance measure of O_{2}, \mathrm{CO}_{2} is created, where the oxidation number of \mathrm{C} is +4.

C+O_{2} (overabundance ) \rightarrow \mathrm{CO}_{2}