The characteristics associated with adsorption are:
1. ∆G, ∆H, and ∆S are all negative.
2. ∆G and ∆H are negative, but ∆S is positive.
3. ∆G and ∆S are negative, but ∆H is positive.
4. ∆G is negative, but ∆H and ∆S are positive.
Which of the following statements is correct for the spontaneous adsorption of a gas?
1. | ∆ S is negative and therefore, ∆ H should be highly positive |
2. | ∆ S is negative and therefore, ∆ H should be highly negative |
3. | ∆ S is positive and therefore, ∆ H should be negative |
4. | -∆ S is positive and therefore, ∆ H should also be highly positive |
A plot of log x/m versus log p for the adsorption of a gas on a solid gives a straight line with a slope equal to:
1. log
2. n
3.
4. log 1/k
According to the adsorption theory of catalysis, the speed of the reaction increase because:
1. | The concentration of reactant molecules at the active centers of the catalyst becomes high due to adsorption |
2. | In the process of adsorption, the activation energy of the molecules becomes large |
3. | Adsorption produces heat which increases the speed of the reaction |
4. | Adsorption lowers the activation energy of the reaction |
Which statement is not correct regarding the adsorption of a gas on the surface of a solid:
1. | On increasing temperature adsorption increase continuously |
2. | Enthalpy & entropy change is negative |
3. | Adsorption is more for some specific substance |
4. | Reversible |