NSO Class 11 Mock Test 2026 – Set 1

Sample 1, Logical Reasoning

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 2, Physics

Two vectors A and B are such that |A + B| = |A - B|. What is the angle between the two vectors?

1. A. 0°
2. B. 45°
3. C. 90°
4. D. 180°

Sample 3, Chemistry

According to the Molecular Orbital Theory, which of the following species is diamagnetic and has a bond order of 3?

1. A. O₂
2. B. N₂
3. C. O₂²⁻
4. D. C₂