AP EAMCET · Chemistry · Surface Chemistry
Two statements are given below
Statement I: Adsorption of a gas on the surface of charcoal is primarily an exothermic reaction
Statement II: A closed vessel contains \(\mathrm{O}_2, \mathrm{H}_2, \mathrm{Cl}_2 \mathrm{NH}_3\) gases. Its pressure is \(\mathrm{P}(\mathrm{atm})\). About 1 g of charcoal is added to this vessel and after some time its pressure was found to be less than P (atm)
The correct answer is
- A Both statement-I and statement-II are correct
- B Both statement-I and statement-II are not correct
- C Statement-I is correct but statement-II is not correct
- D Statement-1 is not correct but statement-II is correct
Answer & Solution
Correct Answer
(A) Both statement-I and statement-II are correct
Step-by-step Solution
Detailed explanation
\(\Delta \mathrm{H}\) of adsorption is always negative i.e exothermic so statement \(I\) is correct. and it is observed that the pressure of the gas in the enclosed vessel decreases. The gas molecule concentrate at the surface of the charcoal. So statement II is also true.
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