JEE Main 2020 — Surface Chemistry Question with Solution
From: JEE Main 2020 (Online) 2nd September Evening Slot
Question
Amongst the following statements regarding
adsorption, those that are valid are
(a) H 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) H 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
Choose an option
Show full solutionCorrect option: B
Correct answer
B(a) and (b)
Step-by-step explanation
(a) Since adsorption is exothermic process, as adsorption proceeds number of active sites present over
adsorbent decreases, so less heat is evolved.
(b) Since NH3 has higher force of attraction on adsorbent due to its polar nature.
(c) As the adsorption increases, residual forces over surface decreases.
(d) Since process is exothermic, on increasing temperature it shift to backward direction, so concentration of adsorbate particle decreases.
(b) Since NH3 has higher force of attraction on adsorbent due to its polar nature.
(c) As the adsorption increases, residual forces over surface decreases.
(d) Since process is exothermic, on increasing temperature it shift to backward direction, so concentration of adsorbate particle decreases.
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