the presence of which reactant is the best indicator of an oxidation - reduction reaction?\no kno₃\no…

the presence of which reactant is the best indicator of an oxidation - reduction reaction?\no kno₃\no h₂so₄\no naoh\no h₂

the presence of which reactant is the best indicator of an oxidation - reduction reaction?\no kno₃\no h₂so₄\no naoh\no h₂

Answer

Brief Explanations:

Oxidation - reduction reactions involve transfer of electrons. Hydrogen gas ($H_2$) is often involved in redox reactions as it can easily lose or gain electrons. $KNO_3$, $H_2SO_4$ and $NaOH$ are not as characteristic of redox reactions as $H_2$. For example, $H_2$ can act as a reducing agent in many reactions, donating electrons.

Answer:

D. $H_2$