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Binary Compounds - Hydrides

Arrange the f...

Question

Arrange the following in increasing acidic strength.
$H_{2} O, H_{2} S, H_{2} S e$

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Solution

Down the group acidic strength of hydrides increases because of increase in non-metallic nature and decrease in electronegativity.
The correct order is: $H_{2} O < H_{2} S < H_{2} S e$

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