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Amongst the following which property for...

Amongst the following which property for the hydrides of group 16 is incorrect?
1.Thermal stability of hydrides decreases down the group.
2. The acidic character increases from `H_(2)`O to `H_(2)`Te
3.The bond (H -- E) dissociation decreases down the group.
4.Group 16 hydrides do not have a bent shape.

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