Speed of Sound — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Speed of Sound.

Comparative analysis of speed in different gases at varying conditions.

high

NEET often tests the proportionality of speed with $\sqrt{T}$ and $1/\sqrt{M}$. A question could combine these, asking to compare speeds of two different gases at different temperatures, requiring careful application of $v = \sqrt{\gamma RT/M}$. This tests multiple concepts in a single problem, making it a good discriminator. For instance, comparing the speed of sound in Helium at $27^circ ext{C}$ with that in Oxygen at $127^circ ext{C}$.

Conceptual question on the independence of speed from pressure, frequency, and amplitude.

medium

These are common misconceptions that NEET loves to exploit. A question might present a scenario where pressure or frequency changes and ask about the effect on speed. Students who haven't firmly grasped that speed is an intrinsic property of the medium (under constant conditions) and not the wave itself are likely to fall into these traps. A well-framed MCQ with subtle distractors can effectively test this understanding.

Application of Laplace's formula for a specific gas, given its properties.

medium

While direct calculation using $v = \sqrt{\gamma P/\rho}$ is less common than proportionality questions, a problem could provide the pressure, density, and $\gamma$ for a specific gas and ask for the speed. This tests the direct application of the core formula and ensures students know the role of $\gamma$. It could also be framed as calculating $\gamma$ if speed, P, and $\rho$ are given.