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Of the following acids,the strongest is

$\begin{array}{1 1}H_2S\\He_2Se\\H_2Te\\H_2O\end{array} $

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Answer : $H_2Te$
Electronegativity decreases down the group.Hence,the hold of H in the bond H-M decreases down the group as the atom M becomes more and more metallic.
answered Jul 24, 2014 by sreemathi.v
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