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The ionisation constant of an acid, `K_(a)` is the measure of strength of an acid. The `K_(a)` values of acetic acid, hypochlorous acid and formic acid are `1.74xx10^(-5), 3.0xx10^(-8) and 1.8xx10^(-4)` respectively. Which of the following orders of pH of 0.1 mol `dm^(-3)` solutions of these acids is correct ?A. acetic acid `gt` hypochlorous acid `gt ` formic acidB. hypochlorous acid `gt ` acetic acid `gt ` formic acidC. formic acid `gt` hypochlorous acid `gt `acetic acidD. fromic acid `gt` acetic acid `gt ` hypochlorous acid |
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Answer» Correct Answer - D Greater the ionization constant, greater is the strength of the acid. Hence, `{:(,HCO OH ,gt,CH_(3)CO OH,gt,HClO),(K_(a),1.8xx10^(_4),,1.74xx10^(-5),,3.0xx10^(-8).):}` |
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