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Which of the following statements is true with respect to the types of adsorption?
  • a)
    Chemisorption is stronger than physisorption
  • b)
    Physisorption is stronger than chemisorption
  • c)
    They are both equal
  • d)
    They cannot be compared
Correct answer is option 'A'. Can you explain this answer?
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Which of the following statements is true with respect to the types of...
Types of Adsorption

There are two types of adsorption: physisorption and chemisorption.

Physisorption

Physisorption, also known as physical adsorption, is the adsorption of molecules or atoms onto a surface through weak van der Waals forces. It occurs when the adsorbate molecule interacts with the surface through weak electrostatic forces. Physisorption is a reversible process and occurs at low temperatures.

Chemisorption

Chemisorption, also known as chemical adsorption, is the adsorption of molecules onto a surface through chemical bonds. It occurs when the adsorbate molecule interacts with the surface through strong chemical bonds. Chemisorption is an irreversible process and occurs at high temperatures.

Strength of Adsorption

The strength of adsorption can be compared based on the energy required to remove the adsorbed molecule from the surface. Chemisorption is stronger than physisorption because chemisorption involves the formation of chemical bonds between the adsorbate and the surface, which requires more energy to break than weak van der Waals forces.

Therefore, option 'A' is the correct answer: Chemisorption is stronger than physisorption.
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Which of the following statements is true with respect to the types of...
Chemisorption is stronger than physisorption. Chemisorption involves the forming of a chemical bond between the adsorbent and the adsorbate whereas in physisorption, the molecules are held together by weak Van der Waal’s forces. Therefore, chemisorption is stronger.
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Read the passage given below and answer the following questions:The amount of moisture that leather adsorbs or loses is determined by temperature, relative humidity, degree of porosity, and the size of the pores. Moisture has great practical significance because its amount affects the durability of leather, and in articles such as shoes, gloves and other garments, the comfort of the wearer. High moisture content accelerates deterioration and promotes mildew action. On the other hand, a minimum amount of moisture is required to keep leather properly lubricated and thus prevent cracking. The study indicates that adsorption of moisture by leather is a multi- molecular process and is accompanied by low enthalpies of adsorption. Further at 75-percent relative humidity, the adsorption is a function of surface area alone. Untanned hide and chrome- tanned leathers have the largest surface areas. The leathers tanned with vegetable tanning materials have smaller surface areas since they are composed of less hide substance and the capillaries are reduced to smaller diameters, in some cases probably completely filled by tanning materials. This process of tanning occurs due to mutual coagulation of positively charged hide with negatively charged tanning material. The result of the study indicated that untanned hide and chrome-tanned leather absorb the most water vapour.In these questions a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices.Assertion (

Which of the following statements is true with respect to the types of adsorption?a)Chemisorption is stronger than physisorptionb)Physisorption is stronger than chemisorptionc)They are both equald)They cannot be comparedCorrect answer is option 'A'. Can you explain this answer?
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