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Among the following which one is more ac...

Among the following which one is more acidic ? Give reason.
`H_(2)O,H_(2)S,H_(2)Se and H_(2)Te`

Text Solution

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`H_(2)Te` is more acidic, because the size of the central atom increases. The bond (H—Te) dissociation enthalpy in `H_(2)Te` is low, therefore the `H^(+)` ion is easily lost.
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