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Write the order of thermal stability of ...

Write the order of thermal stability of the hydrides of Group 16 elements.

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Thermal stability depends on bond dissociation energy of M - H. Smaller is the size of central atom stronger will be the bond· higher will be bond dissociation. Thus thermally more stable thus the order is `H_(2)O` > `H_(2)S` > `H_(2)Se` > `H_(2)Te`> `H_(2)P_(O)`.
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