CDS Previous Year GK Questions

Wet straw or gunny bags keep the fresh concrete moist, so water does not evaporate before the cement has hydrated properly.

Sodium is so reactive that carbon cannot reduce its compounds, so it is obtained by passing electricity through molten sodium chloride.

Resistivity is a property of the material itself, so it stays the same when the length of the wire is changed.

Article 213 requires a Governor's ordinance to be laid before the state legislature and lets the Governor withdraw it at any time, but its life after reassembly is six weeks, not two months.

Syngamy is the fusion of a male and a female gamete, and since each gamete is haploid, their union gives a diploid zygote.

Humans have a single functional insulin gene, INS, on the short arm of chromosome 11, and both chains of insulin come from it.

One nanometre is 10⁻⁹ metre, and since one metre is 100 (10²) centimetres, it equals 10⁻⁷ centimetre. The prefix nano means one billionth.

Saturated open-chain hydrocarbons are the alkanes, and every alkane fits the formula CₙH₂ₙ₊₂. In a saturated hydrocarbon every carbon atom is joined to others only by single bonds, so each carbon holds the largest possible number of hydrogen atoms.

Article 348(1)(a) says that, until Parliament by law provides otherwise, all proceedings in the Supreme Court and in every High Court shall be in the English language.

Certiorari, meaning 'to be certified' or 'to be informed', is issued by a higher court to a lower court or tribunal to transfer a case or to quash an order it has already passed.

Article 371A gives Nagaland special protection for Naga religious and social practices, customary law and the ownership of land and its resources.

Elephantiasis, or lymphatic filariasis, is an endemic disease: it stays steadily present in certain regions and develops slowly over years, rather than breaking out suddenly in a large number of people.

Singapore lies at about 1.3° North, which makes it the closest of these cities to the Equator, only about 140 km north of it.

The spring constant is force divided by extension, so its SI unit is newton per metre. Hooke's law says that, within the elastic limit, the restoring force of a spring is proportional to how far it is stretched or compressed: F = −kx.

In the soil classification of the Indian Council of Agricultural Research, based on the USDA Soil Taxonomy, Inceptisols cover the largest share of India, close to 40 per cent of its area.

Mission Indradhanush was launched in December 2014 to bring every child under two years and every pregnant woman under full immunisation against vaccine-preventable diseases.

The wave travels at 1,200 m/s, so 2,400 m takes 2 seconds. The speed of any wave is the product of its frequency and wavelength: v = fλ.

Saubhagya, the Pradhan Mantri Sahaj Bijli Har Ghar Yojana, was launched to give an electricity connection to every household in the country.

All three are fungi that feed saprophytically: they release enzymes onto dead organic matter, digest it outside their bodies and then absorb the dissolved food.

The inner lining of the mouth and the oesophagus is made of squamous epithelium, so an injury to that lining damages this tissue.