Which of the following is not the application of adsorption?

Which of the following is not the application of adsorption?
  1. Use of $\mathrm{SiO}_2$ gel for removing the moisture
  2. Use of coconut charcoal to separate inert gases
  3. Use of $\mathrm{Al}_2 \mathrm{O}_3$ to separate the components of organic mixture in chromatography
  4. Use of $\mathrm{CaCl}_2$ for removing the moisture

Solution

$\mathrm{CaCl}_2$ is hygroscopic in nature and it absorbs moisture rather than adsorbing it on its surface.

Asked in: AP EAMCET 2023 (15 May Shift 1)

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