With reference to supercritical fluid, consider the following statements:
1. Supercritical fluid is neither a solid, liquid, nor gases but rather a liquid–like gas
2. Surface tension in supercritical fluid is comparatively higher
3. Carbon dioxide and water are the most commonly used supercritical fluids
Which of the above statements is/are correct?

Answer: [C] Only 1 & 3

Only statements 1 & 3 are correct. Supercritical fluid is neither a solid, liquid, nor gases but rather a liquid –like gas. There is no surface tension in a supercritical fluid, as there is no liquid/gas phase boundary. Carbon dioxide and water are the most commonly used supercritical fluids, being used for decaffeination and power generation, respectively.

This question is a part of GKToday's Integrated IAS General Studies Module