NSO Class 11 Mock Test 2026 – Set 3

Sample 1, Logical Reasoning

A particle moves along a straight line such that its displacement at any time $t$ is given by $s = t^3 - 6t^2 + 3t + 4$ meters. What is the velocity of the particle when its acceleration is zero?

1. A. -9 m/s
2. B. -12 m/s
3. C. 3 m/s
4. D. 0 m/s

Sample 2, Physics

A wire of length $L$ and cross-sectional area $A$ is made of a material of Young's modulus $Y$. If the wire is stretched by an amount $x$, the work done in stretching the wire is:

1. A. $\frac{Y A x^2}{2 L}$
2. B. $\frac{Y A x^2}{L}$
3. C. $\frac{Y A x}{2 L}$
4. D. $\frac{2 Y A x^2}{L}$

Sample 3, Chemistry

Which of the following gases will show the highest rate of diffusion under identical conditions of temperature and pressure?

1. A. Carbon dioxide ($CO_2$)
2. B. Nitrogen ($N_2$)
3. C. Oxygen ($O_2$)
4. D. Methane ($CH_4$)