Chemistry - s Block Elements Question with Solution | TestHub

Due to high$\text{H}-\text{O}$bond strength,${\text{H}}_{\text{2}}\text{O}$do not act as reducing agent, where as rest of then act as reducing agents.

$\underset{\text{Reducing}\text{action}\text{increases}}{\overset{{\text{H}}_{\text{2}}\text{S}{\text{H}}_{\text{2}}\text{Se}{\text{H}}_{\text{2}}\text{Te}}{\to }}$

due to decrease in$\text{H}-\text{E}$bond strength.