The correct order of K_a in aqueous solution | vedclass

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(B) The acidity of hydrides of group $16$ elements depends on the bond dissociation enthalpy of the $H-E$ bond.As we move down the group,the size of t

Vedclass · Accepted Answer

$H_2Te > H_2Se > H_2S > H_2O$

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(B) The acidity of hydrides of group $16$ elements depends on the bond dissociation enthalpy of the $H-E$ bond.As we move down the group,the size of the central atom increases,which leads to a decrease in the $H-E$ bond dissociation enthalpy.Consequently,the ease of releasing $H^+$ ions increases,meaning the acidity increases down the group.The correct order of acidity $(K_a)$ is: $H_2Te > H_2Se > H_2S > H_2O$.

The correct order of $K_a$ in aqueous solution at $298 \ K$.

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