JEE Main 20202 SeptemberEvening Shift
- Exam
- JEE Main
- Year
- 2020
- Date
- 2 September
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Surface Chemistry
JEE Main 2020 · 2 September · Evening Shift · Chemistry · Surface Chemistry
Amongst the following statements regarding adsorption, those that...
Amongst the following statements regarding adsorption, those that are valid are:
(a) becomes less negative as adsorption proceeds.
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas.
(c) On adsorption, the residual force acting along the surface of the adsorbent increases
(d) With increase in temperature, the equilibrium concentration of adsorbate increases.
(a) becomes less negative as adsorption proceeds.
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas.
(c) On adsorption, the residual force acting along the surface of the adsorbent increases
(d) With increase in temperature, the equilibrium concentration of adsorbate increases.
Options
- A(d) and (a)
- B(b) and (c)
- C(a) and (b)
- D(c) and (d)
Correct answer
C. (a) and (b)
Step-by-step solution
(a) When gas is adsorbed on metal surface.
become less negative with progress of reaction because number of active sites decreases.
(b) Gas with greater value of critical temperature absorbed more. As > {T}_{C}\left({N}_{2}\right){NH}_{3}{N}_{2}.
Statement (c) is wrong because residual forces decrease as adsorption proceeds further.
Statement (d) is also wrong because temperature opposes extent of adsorption.