CDS Previous Year GK Questions

The Dandi March of 1930 was a protest against the British salt tax, and common salt is sodium chloride, NaCl.

Arabica, Robusta and Liberica are the main species of the coffee plant, Coffea, grown around the world. Arabica (Coffea arabica) gives a milder, more aromatic coffee and grows best on cool hill slopes at higher altitudes.

An alkali is a base that dissolves in water, so all alkalis are soluble, but not all bases are alkalis; statement 1 has it the wrong way round.

This statement is wrong: biogas is renewable, because the cattle dung, crop waste and kitchen waste it is made from are produced again and again.

NITI Aayog is a policy think tank that designs strategies and long-term policy and programme frameworks; it neither imposes policies on states nor allocates funds.

Sugarcane needs plenty of water through a long growing season, so it is grown under irrigation or in high-rainfall areas, not as a dryland crop.

The water at the bottom warms, becomes lighter and rises, while cooler water sinks to take its place, and these convection currents carry heat through the pot.

Dolomite is a carbonate of calcium and magnesium, a base that neutralises soil acidity and so raises the pH. Dolomite, CaMg(CO₃)₂, is a common liming material.

Three equal resistors R in parallel have a combined resistance of R/3, and at the same voltage the power, V²/R, becomes three times as large.

Both gain the same kinetic energy, but the electron is far lighter, so it moves much faster. A charge q accelerated through a potential difference V gains kinetic energy qV.

A perfectly horizontal rope has no upward component of tension, so no finite tension can hold up the 200 N weight with the rope fully straight.

Article 15(2) says no citizen can be denied access to, or the use of, wells, tanks, bathing ghats, roads and places of public resort maintained wholly or partly out of State funds, on grounds only of religion, race, caste, sex or place of birth.

The best-known Chandimangala, Chandimangal or Abhayamangal, was composed in Bengali by Mukundarama Chakravarti, honoured as Kavikankan, in the late 16th century.

Digestion begins in the mouth, where saliva adds salivary amylase to the food as it is chewed. Salivary amylase, also called ptyalin, starts breaking starch into maltose while food is still in the mouth.

Formed in April 1918 by B. P. Wadia among the textile workers of Madras, it is regarded as India's first trade union in the modern, organised sense.

All three features, richness in lime, iron, magnesia and alumina, a deep clayey and impermeable texture, and a spread over Maharashtra, Madhya Pradesh and Gujarat, describe the black or regur soil.

The stinging hairs on nettle leaves inject methanoic acid, also called formic acid, into the skin, which causes the burning pain.

Starlight bends as it passes through air layers of changing density, and because these layers keep moving, the star seems to flicker.

Momentum is mass times velocity, 10 × 10 = 100 N.s, and kinetic energy is half the mass times the square of the speed, ½ × 10 × 10 × 10 = 500 J. Linear momentum, p = mv, measures the quantity of motion and is a vector; its unit…

The Census defines a literate as a person aged seven or above who can both read and write with understanding in any language, so someone who can only read does not qualify.