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Why is H2S acidic whereas H2O is neutral...

Why is `H_2S` acidic whereas `H_2O` is neutral?

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S-H bond is weaker than O-H bond because of bigger size of S atom hence `H_2S` dissociates easily to give `H^(+)` ions
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PATHFINDER-P-BLOCK ELEMENTS-QUESTION BANK
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  12. How is ozone prepared?

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