Surface Tension and Viscosity — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Surface Tension and Viscosity.

Comparative analysis of viscosity/surface tension based on molecular structure and IMFs.

high

This is a fundamental application of understanding intermolecular forces, which is a core concept in physical chemistry. NEET frequently tests the ability to compare properties of different substances based on their molecular interactions. Questions could involve ranking liquids by viscosity or surface tension, or explaining why one liquid has a higher value than another, directly linking to the number and strength of hydrogen bonds or other IMFs.

Conceptual questions on the effect of temperature on viscosity for both liquids and gases.

high

The contrasting effect of temperature on the viscosity of liquids (decreases) and gases (increases) is a classic point of confusion and thus a high-yield testable concept. It requires understanding the different molecular mechanisms of viscosity in each state. Questions often present this as a direct comparison or ask for the correct trend for one of the states.

Application-based questions involving surface tension phenomena (e.g., detergents, capillary action, spherical drops).

medium

NEET often includes questions that connect theoretical concepts to real-world observations. Explanations for why detergents work, why water rises in a capillary, or why raindrops are spherical are direct applications of surface tension principles. These questions test not just recall but also the ability to apply the concept to practical scenarios.