Comprehension \( \quad \) : A chemist was studying the phenomenon of adsorption by putting blood...

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Comprehension \( \quad \) : A chemist was studying the phenomenon of adsorption by putting blood charcoal in \( \mathrm{KCl} \) solution. \( \mathrm{He} \) /she observed difference in behaviour with dilute \( \mathrm{KCl} \) solution and with concentrated \( \mathrm{KCl} \) solution. \( \mathrm{He} / \) she also made a detailed study of the adsorption of gases on solid adsorbents. Helshe observed that at the same temperature, different amounts of gases like \( \mathrm{NH}_{3}, \mathrm{SO}_{2}, \mathrm{CO}_{2}, \mathrm{HCl} \) were adsorbed by the same amount of the adsorbent. \( \mathrm{He} / \) she further studied the effect of temperature on adsorption and observed that in some cases, adsorption showed a regular trend while in some other cases, the trend was not regular.
Which of the following result, the chemist must have observed about his/her studies with \( \mathrm{KCl} \) solution?
(a) Dilute \( \mathrm{KCl} \) solution shows no adsorption whereas concentrated \( \mathrm{KCl} \) solution shows adsorption
(b) Concentrated \( \mathrm{KCl} \) solution shows no adsorption whereas dilute \( \mathrm{KCl} \) solution shows adsorption
(c) Dilute \( \mathrm{KCl} \) solution shows positive adsorption whereas concentrated \( \mathrm{KCl} \) solution shows negative adsorption
(d) Concentrated \( \mathrm{KCl} \) solution shows positive adsorption whereas dilute \( \mathrm{KCl} \) solution shows negative adsorption
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