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Which of the following statements is true with respect to the types of adsorption?a.Chemisorption is stronger than physisorptionb.They are both equalc.Physisorption is stronger than chemisorptiond.They cannot be compared

Question

Which of the following statements is true with respect to the types of adsorption?a.Chemisorption is stronger than physisorptionb.They are both equalc.Physisorption is stronger than chemisorptiond.They cannot be compared

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Solution

The correct answer is a. Chemisorption is stronger than physisorption.

Here's why:

Adsorption is a surface phenomenon where particles (atoms, ions, or molecules) from a gas, liquid, or dissolved solid adhere to a surface. There are two types of adsorption: physisorption and chemisorption.

  1. Physisorption: Also known as physical adsorption, it involves weak van der Waals forces. The adsorbate does not undergo any chemical change during physisorption. It is reversible and occurs rapidly at low temperatures.

  2. Chemisorption: Also known as chemical adsorption, it involves a stronger chemical bond formation between the adsorbate and the surface. It is usually irreversible and occurs at higher temperatures.

Given the nature of the forces involved, chemisor

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Similar Questions

Which of the following statements is true with respect to the extent of physisorption?a.Increases with increase in temperatureb.Decreases with increase in temperaturec.Decreases with increase in surface aread.Decreases with increase in the strength of Van der Waals forces

In which of the following cases does adsorption occur more readily?a.Low temperature and high pressureb.High temperature and high pressurec.Low temperature and low pressured.High temperature and low pressure

Which of the following statements is not true with respect to chemisorption?a.Forms a unimolecular layerb.Has a large heat of adsorptionc.Depends on nature of adsorbate and adsorbentd.Occurs at low temperature

Which of the following statements is correct with respect to physisorption?a.It is reversibleb.ΔH < 0c.All of the aboved.It is spontaneous

Which of the following can result in a transition from physisorption to chemisorption?a.Increase in surface areab.Increase in temperaturec.Decrease in pressured.Decrease in temperature

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