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Question
Give reasons Thermal stability decreases from H2O to H2Te.
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Solution
The themal stability of hydrides of group 16 decreases as we move down the group i.e. H2O to H2Te. This is because on moving down the group, the size of the atom (attached to the hydrogens in a hydride) increases due to which the bond between hydrogen and the atom attached to it, weakens. Hence, it easily breaks on heating.
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