Question

Identify the correct statements from the following.
[I.] Glass is an extremely viscous liquid.
[II.] Increase in temperature decreases the surface tension of liquids.
[III.] Compressibility factor for an ideal gas is zero.

• A. I, II, III
• B. I, II only
• C. I, III only
• D. II, III only

Hint:

Remember: For ideal gases, \(Z = 1\); a value of 0 for compressibility factor is incorrect. Also, surface tension generally drops as temperature rises.

Answer 1

The Correct Option is B

Step 1: Analyze each statement Statement I: Glass is considered an extremely viscous liquid rather than a true solid. Statement II: Surface tension decreases with an increase in temperature due to weakening of cohesive forces. Statement III: For an ideal gas, compressibility factor \(Z = 1\), not zero. Step 2: Conclusion
Only statements I and II are correct.