Which is the correct thermal stability order for ?
Bond angle of hydrides of oxygen family -
All these hydrides are angular melocules and the bond angle H-X-H (X is O,S,Se,Te)
decreases from H2O to H2Te
Thermal Stability of Hydride -
Thermal stability increases with increase in electronegativity difference
Correct order for thermal stability:
Thermal Stability of hydrides of group 16 elements decreases down the group.
It is because M-H bond dissociation energy decreases down the group with an increase in the size of a centred atom.