Railway GK Questions 2026

This scheme, launched in 2015 as a component of the National Mission for Sustainable Agriculture, groups farmers into clusters, trains them in organic practice and certifies their produce through the Participatory Guarantee System of India, in which members of the group inspect one another's fields.

Endosulfan is an organochlorine insecticide that was sprayed from the air over state owned cashew plantations in Kasaragod for about two decades.

The Stockholm Convention lists chemicals that resist breakdown, travel long distances, accumulate in fatty tissue and harm health, beginning with the twelve named compounds often called the dirty dozen; DDT, aldrin, endrin, dieldrin and the dioxins are on that list, and DDT is allowed only in restricted disease vector control.

This Act, with the Insecticides Rules of 1971, sets up the registration of every pesticide before it may be sold, licensing of manufacturers and dealers, labelling and packing requirements and the appointment of insecticide inspectors and analysts.

This red worm, often called the red wiggler or tiger worm, lives in the surface litter layer rather than in deep burrows, eats a large weight of organic waste every day, tolerates crowding in a pit or bed and breeds quickly.

Rachel Carson, an American marine biologist, gathered the evidence on DDT and other sprays and argued that a chemical released into a field does not stay in that field.

Dichloro diphenyl trichloroethane is built on a chlorinated hydrocarbon skeleton, which makes it fat soluble, chemically stable and extremely slow to break down in soil and water.

Sikkim began phasing chemical fertilisers out in 2003, converted its entire cultivated area to certified organic practice and was declared a fully organic state.

A pesticide such as DDT dissolves in fat, is not broken down and is not excreted, so the amount in a predator's body is the sum of what all its prey carried.

Rhizobium is a symbiotic bacterium that enters the roots of pulses, groundnut, soybean and other legumes and multiplies inside swellings called root nodules.

Organic farming is defined by the inputs it refuses. In place of factory made fertilisers it uses farmyard manure, compost, vermicompost, green manure and biofertilisers such as Rhizobium and Azotobacter.

A barcode must be presented squarely to a scanner, one item at a time, and a torn or dirty label fails.

A Bluetooth link does not stay on one frequency. Master and slave agree on a pseudo random sequence and jump together between the narrow channels of the 2.4 GHz band many hundreds of times a second.

Infrared communication, the old IrDA link of television remote controls and early mobile phones, uses light just beyond the red end of the visible spectrum.

WPA3 is the newest of the four and the strongest; it replaces the old pre shared key handshake with simultaneous authentication of equals, which resists offline guessing of the password, and it encrypts traffic even on an open network.

The technology is named after Harald Gormsson, the tenth century king of Denmark nicknamed Bluetooth, who brought the Danish tribes under one rule.

A FASTag is a battery free RFID sticker pasted on the inside of the windscreen. An overhead reader at the toll plaza energises it, reads the identity number, matches it with the linked prepaid wallet or bank account and debits the toll while the vehicle keeps moving.

A passive tag is only a chip and an antenna. When it enters the field of a reader, the incoming radio waves induce a current in the antenna, that current powers the chip for an instant, and the chip replies by modulating the reflected signal, a method called backscatter.

NFC is built on the high frequency band of radio frequency identification and uses magnetic induction between two loop antennas at 13.56 MHz, which is why the devices must be brought within about four centimetres of each other.

In a piconet one device acts as the master and sets the clock and the hopping sequence, and up to seven other devices can be active slaves at the same time, which makes eight devices in the piconet in all.