During the adsorption of krypton on activated charcoal at low temperature ………..

Options

A. `DeltaHlt0` and `DeltaSlt0`
B. `DeltaHgt0` and `DeltaSlt0`
C. `DeltaHgt0` and `DeltaSgt0`
D. `DeltaHlt0` and `DeltaSgt0`

Answer

A

Explanation

Adsorption of kryption on activated charcoal at low temprature means it absorbed by physisorption process.That means accumulation of gases on the surface of solid by weak van der Waal.s forces.Adsorption Is an exothermic process.So `DeltaH` and `DeltaS` are negative (`DeltaHlt0,DeltaSlt0)` to this process due to freedom of movement of its molecules becomes restricted when gas is adsorbed.