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(D) The acidity of hydrides of group $16$ elements increases down the group. This is because the bond dissociation enthalpy of the $H-E$ bond decrease

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The $H-S$ bond is weaker than the $H-O$ bond

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(D) The acidity of hydrides of group $16$ elements increases down the group. This is because the bond dissociation enthalpy of the $H-E$ bond decreases as the size of the central atom $(E)$ increases. Since the size of $S$ is larger than $O$,the $H-S$ bond is significantly weaker than the $H-O$ bond. Consequently,$H_2S$ can release $H^+$ ions more easily than $H_2O$,making it acidic.

Although oxygen is more electronegative than sulfur,$H_2S$ is acidic while $H_2O$ is neutral. This is because ..........

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