Railway GK Questions 2026

The iris is the coloured ring in front of the lens, formed by the front part of the choroid, and the muscles in it widen or narrow the pupil so that the right amount of light reaches the retina; in dim light the pupil opens wide and in bright light…

Carborundum, or silicon carbide (SiC), is one of the hardest substances known, so it can grind, cut and polish other materials, which is what an abrasive must do.

Too little fluoride in drinking water leaves tooth enamel weak, so teeth decay more easily and develop cavities, called dental caries.

The inner planets are the four that orbit the Sun inside the asteroid belt: Mercury, Venus, Earth and Mars. The asteroid belt between Mars and Jupiter divides the solar system into two groups.

Potassium carbonate comes from a strong base and a weak acid, so statement 1 is wrong, while statements 2 and 3 are right.

When water is short, leaves make more abscisic acid (ABA), which makes the guard cells lose water and close the stomata, so the plant loses less water through transpiration.

Every biological molecule, from sugars and fats to proteins and DNA, is built on a skeleton of carbon atoms, which is why carbon is called the basic building block of life.

A hydrogen bomb fuses light hydrogen nuclei, while a uranium bomb splits heavy uranium-235 nuclei. In nuclear fission a heavy nucleus such as uranium-235 absorbs a neutron and splits into two lighter nuclei, releasing energy and two or three more neutrons.

The base is made thin and lightly doped so that most charge carriers from the emitter cross it to the collector.

Flint glass contains lead oxide, which gives it a high refractive index and clarity, so it is used for lenses and prisms of optical instruments.

Lysosomes bud off from the Golgi apparatus as small membrane-bound sacs packed with digestive enzymes. The hydrolytic enzymes of a lysosome are first made on ribosomes attached to the rough endoplasmic reticulum.

For resistors in parallel the reciprocals add: 1/11 + 1/22 + 1/33 = 11/66 = 1/6, so the equivalent resistance is 6 Ω. Taking 66 as the common denominator, 1/11 becomes 6/66, 1/22 becomes 3/66 and 1/33 becomes 2/66.

Rhizopus, the bread mould, feeds on dead and decaying organic matter, which is exactly what a saprophyte does. A saprophyte gets its food by releasing digestive enzymes onto dead matter such as stale bread, fruit or leaf litter and then absorbing the simple nutrients that result.

He was honoured at the Dushanbe event for his contribution to Hindi literature and education, including a detailed study of philology, and he is described as the first recipient of the Padma Shri from Tajikistan, which is the detail most likely to be asked.

The Defence Minister used this comparison in Dushanbe to show how far India has moved towards a less-paper and less-cash economy, and he described the country as a global hub for real-time digital payments.

Rajnath Singh said India has signed free trade agreements with that many countries, and he singled out the agreements with the United Kingdom and the European Union, which are expected to remove tariffs on 99 per cent of Indian exports to those two markets.

Speaking to the Indian diaspora in Dushanbe on 20 October 2026, the Defence Minister said defence exports had touched that record level, and in the same breath he put defence production at Rs 1.80 lakh crore, so the two figures are best learnt as a pair because an examiner can…

Niranjan Mukundan won the bronze in the Men’s 200m Individual Medley SM7 event at the Asian Para Games 2026 on 20 October 2026, and the individual medley is a swimming race in which one competitor covers the distance in four different strokes.

Hokato Hotozhe Sema took the bronze there on 20 October 2026, and the Prime Minister noted that the throw improved on what he had produced at the previous edition of the Games, calling it a sign of passion and dedication.

Preeti Pal finished second in the Women’s 200m T35 sprint at the Asian Para Games 2026 on 20 October 2026, and the Prime Minister described her as a fine example of perseverance and dedication while hoping she would carry the momentum into her remaining events.