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(A): Adsorption is a surface phenomenon....

(A): Adsorption is a surface phenomenon.
(R) : During adsortion, residual force of surface decreases

A

Both (A) and (R) are true (R) explains properly (A)

B

Both (A) and (R) are true (R) does not explain (A)

C

(A) is ture, (R) is false.

D

(A) is false, (R) is true.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given statement and reason regarding adsorption, we will break it down step by step. ### Step-by-Step Solution: 1. **Understanding Adsorption**: - Adsorption is defined as the process in which atoms, ions, or molecules from a gas, liquid, or dissolved solid adhere to a surface. This process occurs at the interface between the adsorbent (the surface) and the adsorbate (the substance being adsorbed). 2. **Identifying the Statement (A)**: - The statement (A) claims that "Adsorption is a surface phenomenon." This is true because adsorption occurs exclusively at the surface of the adsorbent. 3. **Identifying the Reason (R)**: - The reason (R) states that "During adsorption, residual force of surface decreases." This is also true. When molecules adsorb onto a surface, they interact with the surface, which can lead to a reduction in the residual forces acting on the surface. 4. **Analyzing the Relationship**: - While both the statement (A) and the reason (R) are true, we need to determine whether the reason explains the statement. The statement describes what adsorption is, while the reason describes a consequence of the process. 5. **Conclusion**: - Since both the statement and the reason are true, but the reason does not directly explain why adsorption is a surface phenomenon, we conclude that the correct interpretation is that both are true, but the reason does not explain the statement. ### Final Answer: The correct answer is that the statement (A) is true, the reason (R) is true, but the reason does not explain the statement. ---
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Surface tension of a liquid is a molecular phenomenon of liquids involving the force of cohesion along the liquid molecules. It is scalar quantity and is numberically equal to the surface energy. Numerically, it is proved that the potential soluble salts and surface active substance. Sparingly soluble salts and surface active substances decrease the surface tension of the liquid. However, the fairly soluble solutes increase the surface tension of the liquid. Surface tension of a liquid is independent of surface area but it depends on the intermolecular forces and the temperature. Which among the following is not the unit of surface tension ?

Surface tension of a liquid is a molecular phenomenon of liquids involving the force of cohesion along the liquid molecules. It is scalar quantity and is numerically equal to the surface energy. Numerically, it is proved that the potential soluble salts and surface active substance. Sparingly soluble salts and surface active substances decrease the surface tension of the liquid. However, the fairly soluble solutes increase the surface tension of the liquid. Surface tension of a liquid is independent of surface area but it depends on the intermolecular forces and the temperature. Surface tension of a liquid does not depend on :