UPSC CAPF Previous Year GK Questions

Where oil meets water, the unequal pull of their molecules sets up a surface (interfacial) tension that keeps the two liquids as separate layers.

Violet light has the shortest wavelength among the visible colours, so the medium bends it the most. The splitting of white light into its colours is called dispersion.

Mitochondria carry their own circular DNA and their own ribosomes, so they can make some of their own proteins. Mitochondria are the sites of aerobic respiration, where ATP is produced, which is why they are called the powerhouse of the cell.

Photosynthesis absorbs energy from sunlight to build glucose, so it is an endothermic process. An endothermic process takes in heat or light from its surroundings, while an exothermic one gives energy out.

In this 1992 case, also called the Mandal case, the Supreme Court held that the creamy layer must be kept out of OBC reservation.

Springs appear where groundwater meets a barrier or a surface outlet, which happens in jointed rocks, karst areas and tilted strata, but not commonly in dry regions.

The real interest rate is the nominal rate minus the rate of inflation: 24 minus 10 gives 14 percent. The nominal interest rate is the rate written on the loan, here 24 percent a year.

The de Broglie wavelength depends only on momentum, so equal wavelengths mean equal momenta. In 1924 Louis de Broglie proposed that every moving particle has a wave linked to it, with wavelength λ = h/p, where h is Planck's constant and p is the linear momentum.

The product forms a coating that shuts the acid out. Calcium reacts with dilute sulphuric acid to give calcium sulphate and hydrogen gas: Ca + H2SO4 gives CaSO4 + H2.

Kautilya's daily time-table for the king does not include moving through the town in disguise; he learns about his people through spies instead.

The atomic number (Z) is defined as the number of protons in the nucleus of an atom. Every atom of an element has the same number of protons, so the atomic number identifies the element: hydrogen has 1, carbon 6 and oxygen 8.

India's net zero target announced at COP-26 is the year 2070, not 2047. At COP-26 in Glasgow in November 2021, Prime Minister Narendra Modi announced five commitments called the Panchamrit (five nectar elements).

The Constitution (First Amendment) Act, 1951 inserted the Ninth Schedule along with Article 31B. Courts had begun striking down zamindari abolition and other land reform laws for violating the right to property.

Platelets, or thrombocytes, gather at a cut and start the process that forms a clot and stops bleeding. Platelets are tiny cell fragments without a nucleus, broken off from large cells called megakaryocytes in the bone marrow.

Most Ashokan inscriptions are in Brahmi, and the script already shows regional differences in the shapes of its letters. Ashoka's edicts were written mostly in Prakrit, in the Brahmi script, which James Prinsep deciphered in 1837-38.

Glass is made by melting silica sand with fluxes and stabilisers, and this option lists the standard batch. Silica, from pure sand, forms the glassy network.

The Central Vigilance Commission was created in 1964 by a government resolution, on the advice of the Committee on Prevention of Corruption headed by K. Santhanam.

Scattering acts on incoming short-wave sunlight, while the heat the Earth gives back as long-wave energy reaches the air by conduction, convection and radiation.

A monopoly's marginal revenue curve lies below its average revenue curve, not above it. A monopolist faces the whole market's downward-sloping demand curve, which is its average revenue curve.

Chemical messengers called neurotransmitters are released from the nerve endings, the tips of the axon, into the synapse. A nerve impulse travels from the dendrites through the cell body and along the axon as an electrical signal.