Railway GK Questions 2026

This is wrong, because a compound is a pure substance with a fixed composition throughout. Pure substances are of two kinds, elements and compounds.

Zinc gives hydrogen with both acids and alkalis, and it displaces copper from copper sulphate, but statement III mixes up the acids of tamarind and tomato.

Dengue is known for lowering the platelet count, which can lead to bleeding in severe cases. Dengue is a viral disease spread by the bite of the Aedes mosquito, mainly Aedes aegypti, which breeds in clean, stagnant water and bites during the day.

This is false, because most antibiotics, starting with penicillin, come from microbes. Alexander Fleming discovered penicillin in 1928 from the mould Penicillium notatum, which stopped the growth of bacteria around it.

The doldrums are the calm equatorial low-pressure belt, and the chinook is a warm, dry winter wind that raises temperatures quickly.

Oxygen-rich blood from the lungs returns through the pulmonary veins into the left auricle (left atrium) of the heart. The human heart has four chambers: two upper auricles (atria) that receive blood and two lower ventricles that pump it out.

Sound travels through water at about 1,480 metres per second at 20°C, which rounds to 1,500 m/s. Sound is a mechanical wave and needs a medium.

Osmosis is the movement of water from a dilute solution to a more concentrated one across a selectively permeable membrane.

The Krishna Raja Sagara (KRS) dam is built across the Kaveri near Mandya, close to Mysuru in Karnataka. The dam was built between 1911 and 1932 under the Maharaja of Mysore, Krishnaraja Wadiyar IV, after whom it is named.

Charge equals current multiplied by time, and 1.0 A for 600 seconds gives 600 coulombs. Electric current is the rate of flow of charge, so I = Q ÷ t, or Q = I × t. Time must be in seconds: 10 minutes is 10 × 60 = 600 seconds.

The Paramhansa Mandali was a secret society that worshipped one God and worked to break the rules of caste. The Paramhansa Mandali was founded in Bombay in 1840 (some sources give 1849) by Dadoba Pandurang, with Durgaram Mehtaji and others.

By the law of conservation of momentum, the boy and the cart move together with the momentum the boy brought, so their speed is 104 ÷ 55, about 1.89 m/s. With frictionless wheels, no outside horizontal force acts, so total momentum stays the same.

The brothers Harihara I and Bukka Raya I founded the Vijayanagara kingdom in 1336. Harihara and Bukka were sons of Sangama, so their line is called the Sangama dynasty, the first of four dynasties to rule Vijayanagara (Sangama, Saluva, Tuluva and Aravidu).

Roopkund is a high-altitude glacial lake in the Chamoli district of Uttarakhand. Roopkund lies at a height of about 5,000 metres in the Garhwal Himalaya, below the peaks of Trishul and Nanda Ghunti.

A balanced diet contains all the nutrients the body needs, along with roughage and water, in the right amounts. Carbohydrates and fats give energy, proteins build and repair the body, and vitamins and minerals protect against disease and keep body processes running.

Four grams of hydrogen gas is two moles, so it contains 2 × 6.022 × 10²³, about 1.2 × 10²⁴ molecules, not 6.022 × 10²³.

In Chola inscriptions, shalabhoga was land set aside for the upkeep of a school (shala). Chola inscriptions record many kinds of land, mostly gifts made by kings and wealthy people.

The total mass of the reactants equals the total mass of the products, which is exactly what this law states.

More base than acid has been added, so the mixture is basic, and phenolphthalein turns pink in a basic solution.

Because the dams and canals served more than one successor state, the Act apportioned rights in the Bhakra-Nangal and Beas projects and created a board to administer and operate them.