Question

write any two chemical reactions in which water acts as a reducing and oxidising agent respectively

Answer 1

The reactions in which water acts as a reducing and oxidising agent-

• When water reacts with strongly active non- metal such as fluorine and chlorine then it acts as weak reductant and thus releases dioxygen.

2F2 (g) + 2H2O (l) ⇒4HF (aq) + O2 (g)

2Cl2 (g)+ 2H2O (l) ⇒ 4 HCl (aq) + O2 (g)

Answer 2

"Oxidation is defined as the addition of oxygen/electronegative element to a sub stance or removal of hydrogen/ electropositive element from a substance.

Reduction specifies that, when a reaction involves the loss of electrons in half of the process is called oxidation reaction.

Similarly, when a reaction involves the gain of electrons in other half of the process is called reduction reaction.

$2 F_2  +  H_2O  \rightarrow 2 HF + O_2   ( as reducing agent)  ;$                                                          

$C(s) + H_2O(g) \rightarrow H_2(g) + CO(g) ( as oxidizing agent)$"