Railway GK Questions 2026

It occurs through pores called hydathodes at the leaf margin or tip, usually in the early morning when the soil is moist, the air is humid and transpiration is low, so root pressure forces out drops of water with dissolved salts; Colocasia, grasses and tomato show it well.

Dixon and Joly explained that water molecules cling to one another by cohesion and to the xylem walls by adhesion, forming an unbroken column; evaporation from the leaf surface creates a suction at the top that pulls this column upward.

Caesium melts at about 28.5 °C, the lowest of these alkali metals, so it can turn liquid on a warm day or in the hand.

The girth, or thickness, of a stem increases only through the lateral meristems, the vascular cambium and the cork cambium.

The gastric glands in the stomach wall secrete pepsin, which begins the digestion of proteins into smaller peptides. The chief cells of the gastric glands release pepsin in an inactive form, pepsinogen.

The blue colour comes from water of crystallisation: blue vitriol is CuSO4·5H2O, and heating drives off these five water molecules to leave white anhydrous copper sulphate.

Zinc lies in the middle of the reactivity series, so its oxide can be reduced to the metal by heating it with carbon (coke): ZnO + C → Zn + CO.

This is false: aluminium has three electrons in its outer shell and loses all three, so its valency is 3.

Cambium lies along the sides of stems and roots and its dividing cells increase their thickness, which is the work of a lateral meristem.

Sodium hydroxide dissolves in water and splits completely into Na+ and OH- ions; the ions carry current and the hydroxide ions make the solution strongly basic.

Powers of lenses in contact simply add, so the combination has a power of 2 + 2 = 4 dioptre, and its focal length is 1/4 m, that is 0.25 m. The power of a lens is the reciprocal of its focal length in metres, P = 1/f, and is…

Parenchyma is the basic packing tissue of plants, and it is also present in both xylem (xylem parenchyma) and phloem (phloem parenchyma).

Oxidising power of the halogens falls as we go down group 17, so iodine is the weakest and fluorine the strongest oxidising agent.

Urea, CO(NH2)2, contains about 46 per cent nitrogen, the highest of any common solid fertiliser, and is the main nitrogen fertiliser used in India.

The primary structure of a protein is simply the linear order of amino acids joined one after another by peptide bonds.

This statement is false: diamond is an electrical insulator because it has no free electrons. In diamond, every carbon atom uses all four of its valence electrons to form strong covalent bonds with four other carbon atoms in a rigid three-dimensional network.

TELNET is an application-layer protocol that lets a user log in to a remote computer and work on it through a text terminal.

The live demonstration of Shrutlekh at the symposium showed speech being written down as it was spoken and translated at the same moment, a capability intended for lecture halls, research seminars, conferences and academic discussions.

The figures placed before the symposium were that BHASHINI supports 36 Indian languages for text, 23 Indian languages for voice and 35 international languages, that it has recorded over 10 billion cumulative AI inferences, and that its website translation plugin works on more than 800 government websites.

BHASHINI Pragati is a document translation workbench that the Digital India BHASHINI Division built for the CAG, and it was put before the symposium as an example of translating structured documents, including files that run from 100 to 500 pages, with quality checks and data-security safeguards.