SSC CHSL GK Questions 2026

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.

The 802.15 group of standards covers wireless personal area networks, and 802.15.1 is the one that was drawn from the Bluetooth specification; the technology itself is now developed by the Bluetooth Special Interest Group.

Wi-Fi operates in the unlicensed industrial, scientific and medical bands, and the two classic bands are 2.4 GHz and 5 GHz, with 6 GHz added in the latest equipment.

Sukumar Ray wrote Abol Tabol, a collection of nonsense rhymes that is a landmark of Bengali children's writing, along with the story HaJaBaRaLa and the play Chalachittachanchari.

The cartoonist Shankar, famous for his political cartoons and for Shankar's Weekly, founded the Children's Book Trust in New Delhi in 1957 to publish good and affordable books for Indian children, and also started the Shankar's International Children's Competition for painting and writing as well as the doll museum in…

The race in which the slow tortoise beats the overconfident hare is one of the best known fables attributed to Aesop of ancient Greece, along with the fox and the grapes, the boy who cried wolf and the lion and the mouse.

Dodgson was a mathematician at Oxford who wrote Alice's Adventures in Wonderland and its sequel Through the Looking-Glass under the pen name Lewis Carroll, and the nonsense poem Jabberwocky belongs to the same world.