JEE Main 2015 · 10 Apr · Shift 1 · Chemistry Q40

← JEE Main 2015 · 10 Apr · Shift 1

ChemistrySingle correct+4 / -1Question 40 of 90

The following statements relate to the adsorption of gases on a solid surface. Identify the incorrect statement among them :

Enthalpy of adsorption is negative

Entropy of adsorption is negative

On adsorption, the residual forces on the surface are increased

On adsorption decrease in surface energy appears as heat

Answer and worked solution

Official answer: C

Adsorption satisfies the residual forces at the surface, so they decrease. That makes (3) the incorrect statement. ΔH and ΔS are both negative, and the decrease in surface energy appears as heat.

Topics:Adsorption

← Previous question Next question →

JEE Main 2015 · 10 Apr · Shift 1, Chemistry question 40