NDA GK Questions 2026

The kinetic theory of an ideal gas assumes exactly the opposite: that there are no forces of attraction or repulsion between molecules except during the brief moment of a collision.

Temperature is a measure of the average kinetic energy of the particles of a substance, in a solid as in a gas: in a solid the particles are held in fixed positions but vibrate about them, and heating makes the vibrations faster and wider, so the average kinetic energy rises…

The kinetic theory gives the average kinetic energy of a molecule as three halves of the product of the Boltzmann constant and the absolute temperature, and for one mole as three halves of RT.

Graham's law of diffusion states that at the same temperature and pressure the rate at which a gas diffuses is inversely proportional to the square root of its density, and therefore of its molar mass.

Substituting one mole, 273.15 kelvin and one atmosphere in the ideal gas equation gives a volume of 22.4 litres, the molar volume at standard temperature and pressure, and this is the figure used in mole calculations; with the modern standard pressure of one bar the value works out to about…

In SI units the universal gas constant is 8.314 joule per mole per kelvin, obtained by multiplying the Boltzmann constant by the Avogadro number.

Extending the straight line of Charles's law backwards shows that the volume of an ideal gas would become zero at minus 273.15 degrees Celsius, and this point is taken as the zero of the kelvin or absolute scale, at which molecular motion carries its least possible energy.

By Charles's law the volume of a fixed mass of gas at constant pressure is proportional to its absolute temperature, so heating the air inside the envelope makes it expand; some of it escapes from the open mouth, the mass of air left inside falls, its density becomes lower than…

Boyle's law, established in 1662, says that for a fixed mass of gas at constant temperature the product of pressure and volume stays constant, so doubling the pressure halves the volume.

A line through the origin at 45° to each axis joins all the points where the distance along the horizontal axis equals the distance along the vertical axis.

Ram Manohar Lohia, the socialist thinker and leader, put forward the idea of Sapta Kranti, or seven revolutions, as the programme of Indian socialism.

The ozone layer lies in the stratosphere, mostly between about 15 and 35 km above the earth, and it absorbs most of the sun's harmful ultraviolet radiation.

The Moderates, who led the Indian National Congress from 1885 to about 1905, did not seek to overthrow British rule; they believed in its basic fairness and wanted reforms within it.

Both statements about the Preamble are true. Statement 1 is correct because the Preamble resolves to secure to all citizens "EQUALITY of status and of opportunity", alongside justice (social, economic and political), liberty (of thought, expression, belief, faith and worship) and fraternity.

Avani Lekhara is an Indian para-shooter from Jaipur, Rajasthan, who competes in rifle events in the SH1 class. A car accident in 2012 left her with a spinal cord injury, and she took up shooting a few years later.

The Ganga flows from west to east across the northern plains, so the cities follow the order in which the river reaches them.

Statements 1 and 2 are correct, but statement 3 is not. Statement 1 is correct: the Bombay Presidency Association was founded in January 1885 by Pherozeshah Mehta, Badruddin Tyabji and K. T. Telang, and its members hosted the first session of the Indian National Congress in Bombay that December.

Isobars are atoms of different elements that have the same mass number but different atomic numbers. The mass number is the total of protons and neutrons in the nucleus, so isobars have the same number of nucleons arranged differently: more protons and fewer neutrons in one, the reverse in another.

The Ahar culture, also called the Banas culture, is a Chalcolithic (copper and stone age) culture of south-east Rajasthan, spread along the Banas river and its tributary the Berach, roughly between 3000 and 1500 BCE.

Heat produced per unit time is the power, and with a fixed battery voltage the power is P = V²/R. So the circuit gives the most heat when its total resistance is the smallest, and the smallest possible resistance comes from joining all three resistors in parallel.