The P Block Elements - Result Question 38
####39. Which is the correct thermal stability order for $H_2 E(E=O, S, Se, Te$ and $Po)$ ?
[2019]
(a) $H_2 S<H_2 O<H_2 Se<H_2 Te<H_2 Po$
(b) $H_2 O<H_2 S<H_2 Se<H_2 Te<H_2 Po$
(c) $H_2 Po<H_2 Te<H_2 Se<H_2 S<H_2 O$
(d) $H_2 Se<H_2 Te<H_2 Po<H_2 O<H_2 S$
Show Answer
Solution:
- (c) On going down the group, bond dissociation enthalpy of the hydrides of oxygen family decreases. Therefore, thermal stability also decreases.
