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CBSE Class 11-science Answered

why does acidity of hydrides increase as we move from left to right in period?

Asked by imtiyazmulla68 | 23 Mar, 2018, 08:55: PM
Expert Answer
On the right-hand side of the row, the acidity increases in the order PH3 < H2S < HCl. This general trend is related to the increasing electronegativity of the element as we move from left to right in any horizontal row. The elctronegativity increases due to which charge separation and ionization of hydrides increases. This increases the acidic strength of hydrides. 
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