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Which of the following statements is correct for the spontaneous adsorption of a gas?
  • a)
    ΔS is positive and, therefore, ΔH should be negative
  • b)
    ΔS is positive and, therefore, ΔH should also be highly positive
  • c)
    ΔS is negative and, therefore, ΔH should be highly positive
  • d)
    ΔS is negative and therefore, ΔH should be highly negative
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is correct for the spontaneous adsor...
For spontaneous adsorption of a gas, ΔS is negative and ΔH should be highly negative.
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Most Upvoted Answer
Which of the following statements is correct for the spontaneous adsor...
The gas molecules move from the gas phase to the solid phase without any external intervention.

b) The gas molecules move from the solid phase to the gas phase without any external intervention.

a) is correct.
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Read the passage given below and answer the following questions:Adsorption depends on the nature of the adsorbent. The rough solid surface has more number of pores and adsorb more number of gases than the smooth surface. Most common adsorbents are silica gel, activated charcoal. The extent of adsorption also depends on the surface area of solid. Specific surface area of an adsorbent is the surface area available for adsorption per gram of the adsorbent. The greater the surface area of the solid, the greater would be the adsoprtion. Charcoal is a more effective adsorbent than solid wood. Desorption is a process of removing an adsorbed substance from a surface on which it is absorbed.Physisorption is non-specific and any gas can be adsorbed. But the gases which are easily liquefiable (e.g., NH3, HCl, CO2) are adsorbed at a faster rate and to a large extent than the gases which are difficult to liquefy (e.g., H2, O2, N2). It depends on the critical temperature. Higher the critical temperature of a gas, more easily liquefiable it is and more is the rate of adsorption. Chemisorption is specific in nature. Therefore, only those gases can be adsorbed which are capable of forming chemical bonds with the adsorbent.The following questions are multiple choice questions. Choose the most appropriate answer:Q. Select the correct statement regarding desoprtion.

Read the passage given below and answer the following questions:Adsorption depends on the nature of the adsorbent. The rough solid surface has more number of pores and adsorb more number of gases than the smooth surface. Most common adsorbents are silica gel, activated charcoal. The extent of adsorption also depends on the surface area of solid. Specific surface area of an adsorbent is the surface area available for adsorption per gram of the adsorbent. The greater the surface area of the solid, the greater would be the adsoprtion. Charcoal is a more effective adsorbent than solid wood. Desorption is a process of removing an adsorbed substance from a surface on which it is absorbed.Physisorption is non-specific and any gas can be adsorbed. But the gases which are easily liquefiable (e.g., NH3, HCl, CO2) are adsorbed at a faster rate and to a large extent than the gases which are difficult to liquefy (e.g., H2, O2, N2). It depends on the critical temperature. Higher the critical temperature of a gas, more easily liquefiable it is and more is the rate of adsorption. Chemisorption is specific in nature. Therefore, only those gases can be adsorbed which are capable of forming chemical bonds with the adsorbent.The following questions are multiple choice questions. Choose the most appropriate answer:Q. At the same temperature and pressure, select the correct order of adsorption of the following gases on the same mass of charcoal.

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Which of the following statements is correct for the spontaneous adsorption of a gas?a)ΔS is positive and, therefore, ΔH should be negativeb)ΔS is positive and, therefore, ΔH should also be highly positivec)ΔS is negative and, therefore, ΔH should be highly positived)ΔS is negative and therefore, ΔH should be highly negativeCorrect answer is option 'D'. Can you explain this answer?
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Which of the following statements is correct for the spontaneous adsorption of a gas?a)ΔS is positive and, therefore, ΔH should be negativeb)ΔS is positive and, therefore, ΔH should also be highly positivec)ΔS is negative and, therefore, ΔH should be highly positived)ΔS is negative and therefore, ΔH should be highly negativeCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following statements is correct for the spontaneous adsorption of a gas?a)ΔS is positive and, therefore, ΔH should be negativeb)ΔS is positive and, therefore, ΔH should also be highly positivec)ΔS is negative and, therefore, ΔH should be highly positived)ΔS is negative and therefore, ΔH should be highly negativeCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is correct for the spontaneous adsorption of a gas?a)ΔS is positive and, therefore, ΔH should be negativeb)ΔS is positive and, therefore, ΔH should also be highly positivec)ΔS is negative and, therefore, ΔH should be highly positived)ΔS is negative and therefore, ΔH should be highly negativeCorrect answer is option 'D'. Can you explain this answer?.
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