A chemist studied the phenomenon of adsorption by putting blood charcoal in `KCL` solution. He observed difference in the behaviour with dilute `KCL` solution and with concentrated `KCL` solution. He also studied the adsorption of different gases on solid adsorbent and the effect of temperature on adsorption. He put forward a mathematical relationship relating `x//m` with equilibrium pressure.
Which of the following result is oberved with the experiment of `KCl` solution ?

Options

A. Dilute `KCl` solution shows no adsorption whereas concentrated `KCl` shows adsorption
B. Concentrated `KCl` solution shows positive adsorption whereas dilute `KCl` solution shows negative adsorption.
C. Concentrated `KCl` solution shows positive adsorption whereas dilute shows negative adsorption.
D. Dilute `KCl` solution shows positive adsorption whereas concentrated `KCl` solution shows negative adsorption.

Answer

B

Explanation

Solution is adsobed from concentrated `KCl` solution whereas solvent (water) is adsorbed from dilute `KCl` solution.