Question

At critical temperature of a liquid, surface tension is:

• A. zero
• B. infinite
• C. varies liquid to liquid
• D. can't be measured

Answer 1

The correct option is A zero

Since surface tension is inversely proportional to temperature thus with an increase in temperature its value decreases and at the critical temperature it becomes zero.

Hence surface tension is zero.

Hence, the correct answer is option $\text{A}$.