Question

Given below are two statements:
Statement (I): Viscosity of gases is greater than that of liquids.
Statement (II): Surface tension of a liquid decreases due to the presence of insoluble impurities.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Statement I is correct but Statement II is incorrect
• B. Statement I is incorrect but Statement II is correct
• C. Both Statement I and Statement II are incorrect
• D. Both Statement I and Statement II are correct

Answer 1

Answer: (B)

Statement I is incorrect but Statement II is correct

Answer 2

Step 1. Analysis of Statement (I): - Viscosity is a measure of a fluid’s resistance to flow. Generally, liquids have higher viscosity than gases because of stronger intermolecular forces in liquids. Therefore, Statement (I) is incorrect.
Step 2. Analysis of Statement (II): - Surface tension is influenced by impurities. Insoluble impurities generally decrease the surface tension of a liquid by disrupting cohesive forces at the surface. Thus, Statement (II) is correct.
Since Statement I is incorrect and Statement II is correct,the correct answer is (2).