NDA GK Questions 2026

The coefficient of friction is the ratio of the limiting or kinetic frictional force to the normal reaction, and since both are forces the ratio is a pure number; the same reasoning applies to other ratios such as the refractive index and relative density.

Friction is defined as the force that opposes the relative motion, or the tendency of relative motion, between two surfaces in contact; it acts along the surfaces and always against the direction of motion.

. The Act of 1919 did not make the Central Executive responsible to the Legislature; the Governor-General and his Executive Council stayed answerable only to the British Parliament.

The Moderates never demanded universal adult franchise; they asked only for a larger share for educated Indians in the legislative councils.

Annie Besant founded the Central Hindu College (with its school) at Benaras in 1898, and it later became the nucleus of Banaras Hindu University.

Only statement 3 is correct: the acid must be added slowly to water, and dilution lowers the concentration of hydronium ions per unit volume.

These are cirrocumulus clouds: high clouds of ice crystals arranged in small white puffs and ripples. Clouds are grouped by height and shape.

Gandhiji regarded Gopal Krishna Gokhale as his political guru, his Rajya Guru. Gandhi first met Gokhale in 1896 and they grew close when Gokhale visited South Africa in 1912.

Planck's constant has the same dimensions as angular momentum, [M L² T⁻¹].

Biogas is mainly methane and carbon dioxide. Biogas is produced when bacteria break down animal dung, crop waste and kitchen waste in the absence of oxygen, a process called anaerobic digestion.

Adiabatic temperature changes in the atmosphere are caused by the expansion and compression of air, with no heat added or removed.

The Prati Sarkar, a parallel government of the Quit India period, was set up in Satara district of Maharashtra. During the Quit India Movement that began in August 1942, people in some areas threw off British authority and ran their own governments.

The Indian federation was not formed by an agreement among the States, so "the federating units consented to form a union" is not a feature of Indian federalism.

A soda-acid extinguisher uses sodium hydrogen carbonate (baking soda) solution and sulphuric acid, which react to release carbon dioxide. In this extinguisher the sulphuric acid is kept in a separate container inside a cylinder filled with sodium hydrogen carbonate solution.

Vivekananda began his famous address at Chicago on 11 September 1893 with the words "Sisters and Brothers of America", and the audience rose in a long ovation.

Nerve impulses are carried by the movement of sodium and potassium ions across the membrane of the nerve cell, so sodium is essential.

Mission Indradhanush is the Union Health Ministry's drive to fully immunise children and pregnant women against vaccine-preventable diseases. The mission was launched on 25 December 2014 to reach children who had missed their routine vaccines or had received them only partly, especially in districts with low coverage.

Salmonella typhi is a rod-shaped bacterium that causes typhoid fever in human beings. Typhoid spreads through food and water contaminated with the faeces of an infected person.

Magnetic field lines are always closed curves, so the statement that they are open curves is the incorrect one. Outside a magnet, field lines run from the north pole to the south pole; inside the magnet they continue from the south pole back to the north pole, closing the loop.

India is not a member of the G7; it attends some summits only as an invited guest country. The Group of Seven is an informal grouping of seven major advanced economies: the United States, the United Kingdom, France, Germany, Italy, Japan and Canada.