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Which of the following is not correct regarding the adsorption of a gas on the surface of solid?
  • a)
    On increasing pressure, adsorption keeps on increasing
  • b)
    Enthalpy and entropy changes are negative
  • c)
    Chemisorption is more specific than physisorption
  • d)
    It is a reversible reaction
Correct answer is option 'A'. Can you explain this answer?
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Which of the following is not correct regarding the adsorption of a ga...
Adsorption does not keep increasing continuously with increase in pressure.
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Which of the following is not correct regarding the adsorption of a ga...
Adsorption of Gas on the Surface of Solid

Introduction:
Adsorption is a process in which a gas or liquid adheres to the surface of a solid or liquid. In this process, the molecules of the gas or liquid become attached to the surface of the solid or liquid. There are two types of adsorption: physical adsorption (physisorption) and chemical adsorption (chemisorption).

Correct Statement:
Option 'A' is not correct regarding the adsorption of a gas on the surface of solid. On increasing pressure, adsorption does not always keep on increasing. This is because the adsorption is dependent on the nature of the gas and the solid surface. There is a limit to the amount of gas that can be adsorbed on the surface of a solid. Beyond this limit, the adsorption becomes saturated and does not increase further with an increase in pressure.

Enthalpy and Entropy Changes:
The process of adsorption is accompanied by a change in enthalpy and entropy. The enthalpy change is negative, indicating that the process is exothermic. The entropy change is also negative, indicating that the molecules become more ordered as they are adsorbed on the surface.

Chemisorption and Physisorption:
Chemisorption is a specific type of adsorption in which the gas molecules are chemically bonded to the surface of the solid. This type of adsorption is more specific than physisorption, in which the gas molecules are only weakly attracted to the surface of the solid.

Reversibility:
Adsorption is a reversible process. The adsorbed molecules can be desorbed from the surface of the solid by changing the conditions such as temperature, pressure, or concentration. The extent to which the adsorption is reversible depends on the nature of the adsorbate and the adsorbent.

Conclusion:
In conclusion, the statement that is not correct regarding the adsorption of a gas on the surface of solid is option 'A'. On increasing pressure, adsorption does not always keep on increasing. The other statements are correct, including the negative enthalpy and entropy changes, the specificity of chemisorption, and the reversibility of the process.
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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 is not correct regarding the adsorption of a gas on the surface of solid?a)On increasing pressure, adsorption keeps on increasingb)Enthalpy and entropy changes are negativec)Chemisorption is more specific than physisorptiond)It is a reversible reactionCorrect answer is option 'A'. Can you explain this answer?
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Which of the following is not correct regarding the adsorption of a gas on the surface of solid?a)On increasing pressure, adsorption keeps on increasingb)Enthalpy and entropy changes are negativec)Chemisorption is more specific than physisorptiond)It is a reversible reactionCorrect answer is option 'A'. 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 is not correct regarding the adsorption of a gas on the surface of solid?a)On increasing pressure, adsorption keeps on increasingb)Enthalpy and entropy changes are negativec)Chemisorption is more specific than physisorptiond)It is a reversible reactionCorrect answer is option 'A'. 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 is not correct regarding the adsorption of a gas on the surface of solid?a)On increasing pressure, adsorption keeps on increasingb)Enthalpy and entropy changes are negativec)Chemisorption is more specific than physisorptiond)It is a reversible reactionCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Which of the following is not correct regarding the adsorption of a gas on the surface of solid?a)On increasing pressure, adsorption keeps on increasingb)Enthalpy and entropy changes are negativec)Chemisorption is more specific than physisorptiond)It is a reversible reactionCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
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