Which of the following statements is incorrect?
1. The property of liquid drops to have minimum surface area is called surface tension.
2. Surface tension of liquids decreases with rise in temperature.
3. The SI unit of surface tension in \(\mathrm{Nm}^{-1}\).
4. Magnitude of surface tension is less, when there is strong attractive force between the molecules.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.