CDS Previous Year GK Questions

A floating body is in equilibrium, so the upward buoyant force exactly balances its weight. By Archimedes' principle, a body in a liquid is pushed up by a force equal to the weight of the liquid it displaces.

These are the three main divisions of the human brain. The fore brain is the largest part.

x86 and MIPS assembly are low-level languages written for particular processor families, while Python and Java are high-level languages. An assembly language uses short mnemonics such as MOV, ADD and JMP that stand directly for a processor's machine instructions, so each family of processors has its own.

Lithium hydrogen carbonate exists only in solution; it cannot be isolated as a solid. All the alkali metals of group 1 form hydrogen carbonates (bicarbonates), but lithium behaves differently from the rest.

Pure water is neutral, and a neutral solution has a pH of 7 at 25 °C. pH is the negative logarithm of the hydrogen ion concentration.

Ultraviolet photons carry more energy than visible light, not less, so this statement is wrong. The energy of a photon is E = hc/λ, so a shorter wavelength means higher energy.

Both statements are true, but the direction in which the Earth spins does not explain why tides occur. Tides are caused mainly by the Moon's pull, with the Sun adding a smaller pull; the Moon's tide-raising force is roughly twice the Sun's because it is so much closer.

Carrying water and food through the plant is the main job of the stem's vascular tissue, not of the leaf.

cVIGIL is the Election Commission of India's app for citizens to report poll-code violations. The name stands for vigilant citizen.

Quo Warranto lies only when the appointment breaks the law; an appointment in tune with a statutory provision gives the court nothing to correct.

The pituitary is a single, pea-sized gland at the base of the brain, while the other three come in pairs.

For Quo Warranto the office must be a substantive one, so saying it must not be substantive is not a condition at all.

The French doctor François Bernier served as physician to Dara Shikoh, Shah Jahan's eldest son. Bernier reached India in 1658, in the middle of the war of succession among Shah Jahan's sons.

Intercalary meristem lies between mature tissues, at the base of leaves and of internodes. Meristems are tissues whose cells keep dividing.

Yeast is a single-celled fungus, placed in kingdom Fungi in Whittaker's five-kingdom system. Yeast cells are eukaryotic, have a cell wall containing chitin and do not make their own food, which are the marks of fungi.

The revolutionary Sachindranath Sanyal wrote Bandi Jivan, an account of his life as a prisoner. Sanyal was closely linked with Rash Behari Bose in the Banaras conspiracy and was sent to the Cellular Jail in the Andamans.

Lysozyme kills bacteria by breaking down their cell walls, and it is found in saliva, tears and mucus. Lysozyme attacks peptidoglycan, the main material of the bacterial cell wall, by splitting the bonds between its sugar units; the weakened cell then bursts.

Presbyopia is an age-related loss of near focusing, and it is corrected with bifocal or progressive lenses. With age the ciliary muscles weaken and the eye lens loses its flexibility, so the power of accommodation falls and the near point moves away.

Newton's law of gravitation is an independent law of nature; it cannot be derived from his three laws of motion.

The cervix is the lower, narrow neck of the uterus, so it belongs to the female reproductive system. The human male reproductive system has a pair of testes that make sperm and the hormone testosterone.