Which is the strongest reducing agent among #H_2O , H_2S , H_2Se , H_2Te#?

1 Answer
Feb 28, 2018

#H_2 Te#


#H_2 Te# is strongest reducing agent among hydrides of 16th group elements because Te is least electronegative among those given in question as on the pauling scale.
Since Te is larger in size it results weaker pulling force on valence electrons. So, it can be oxidised more easily than others and this makes it the strongest reducing agent.