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Which of the following hydrides of Group 16 has the lowest boiling point?

$\begin{array}{1 1}H_2O\\H_2S\\H_2Se\\H_2Te\end{array} $

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Answer : $H_2S$
Because of hydrogen bondings,the boiling point of $H_2O$ is greater than $H_2S$.$H_2Se$ and $H_2Te$ have higher boiling points than $H_2S$ because of heavier atoms Se and Te.
answered Jul 23, 2014 by sreemathi.v
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