The number of statements which are the characteristics of physisorption is
A.It it highly specific in nature
B.Enthalpy of adsorption is high
C.It decreases with increase in temperature
D.It results with increase in temperature
E. No activation energy is needed.

On increasing temperature, activation energy for a reaction decrease. Why?

The materials resistance of which decreases with increases in temperature (i.e. the temperature coefficient of resistance is negative) are called

Assertion: In physisorption, adsorption increase with increases in temperature. Reason: Physisorpation is of exothermic nature.

Yhe rate of chemisorption a. increaeses with decreases in temperature b. increases with increasesin tempreture c. increases with decreases in the pressure of gas d. is independent of the pressure of gas

The correct statements pertaining to the adsorption of a gas on a solid surface are (i) Adsorption is always exothermic (ii) Physisorption may transform into chemisorption at high temperature (iii) Physisorption increases with increasing temperature but chemisorotion decrease with increasing temperature (iv) Chemisorption is more exothermic than physisoption, however, it is very slow due to higher energy of activation

Statement: Threshold energy of a reaction is independent of temperature. Explanation: The energy of activation however decreases with increase in temperature.

Which of the following is correct for the decrease in the physical adsorption with increase of temperature