Tamil Nadu Board Class 10 Science — Important Questions 2026

A fielder in cricket pulls his hands back while catching a ball. The scientific reason behind this action is best explained by which of the following?

A rocket of total mass 1000 kg (including 200 kg of fuel) is fired. The fuel burns and ejects gas at a rate that produces a thrust of 12000 N. What is the initial acceleration of the rocket? (g = 10 m/s²)

At what distance from the centre of the Earth will the acceleration due to gravity be 1/9th of its value on the Earth's surface? (R = radius of Earth)

Which of the following correctly explains why astronauts feel weightless in an orbiting space station?

An object is placed at the centre of curvature (C) of a convex lens. What is the nature of the image formed?

The lens formula relating object distance (u), image distance (v), and focal length (f) is:

A concave lens of focal length 0.5 m is used. What is the power of this lens?

The scattering of light by colloidal particles in a colloidal solution is called:

According to Boyle's Law, if the temperature of a gas is kept constant and its pressure is doubled, what happens to its volume?

Which of the following is the correct formula for the Ideal Gas Equation?

A liquid in a container is heated. Initially, the liquid level falls from 50 ml to 47 ml (as the container expands), and then rises to 52 ml. What is the apparent expansion of the liquid?

Which statement correctly describes Charles's Law?