Observe the following statements :a. The ther | vedclass

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(A) $1$. Thermal stability: As the size of the central atom increases down the group,the $M-H$ bond length increases and bond dissociation enthalpy de

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$a, b, c$

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(A) $1$. Thermal stability: As the size of the central atom increases down the group,the $M-H$ bond length increases and bond dissociation enthalpy decreases. Thus,thermal stability decreases: $H_2O > H_2S > H_2Se > H_2Te$. Statement $a$ is correct.$2$. Acidic nature: Acidic strength depends on the ease of release of $H^+$ ions,which increases as the $M-H$ bond strength decreases down the group. Thus,acidic nature increases: $H_2O $3$. Reducing nature: Reducing character depends on the ability to provide hydrogen,which increases as the $M-H$ bond strength decreases. Thus,reducing nature increases: $H_2S Therefore,all statements $a, b,$ and $c$ are correct.

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