SSC CGL GK Questions 2026

The law of conservation of mass, stated by Antoine Lavoisier in 1789, says that in a chemical reaction mass is neither created nor destroyed.

When copper is left in moist air for a long time, it slowly reacts with oxygen, water vapour and carbon dioxide.

The South Atlantic Drift is part of the West Wind Drift, the cold eastward flow that circles Antarctica in the belt of the westerlies, around 40° to 50° south.

The Charter of the United Nations was drawn up at the United Nations Conference on International Organization held in San Francisco, USA, from April to June 1945, and was signed there on 26 June 1945.

On a hot day the air just above a road or desert sand is much hotter, and so optically rarer, than the air higher up.

At room temperature and normal pressure only two elements are liquids: mercury, a metal, and bromine, a non-metal. Mercury melts at about −39 °C and is used in thermometers and barometers because it stays liquid over a wide range and does not wet glass.

India adopted the parliamentary form of government from Britain, often called the Westminster model.

Potassium permanganate, KMnO₄, forms dark purple crystals that contain no water of crystallization; its formula has no attached water molecules.

This statement is wrong because bryophytes, the mosses and liverworts, have no true vascular tissue: they lack xylem to carry water and phloem to carry food.

As rivers come down from the mountains onto the plains, their slope suddenly drops and they can no longer carry their heaviest load.

The focus, or hypocentre, is the point inside the Earth where the rocks first break and energy is released. The point on the surface directly above it is the epicentre, which is usually where shaking is felt first and strongest, so statement 1 is correct.

The India State of Forest Report 2021, published by the Forest Survey of India, Dehradun, put the forest cover of Arunachal Pradesh at about 79 per cent of its geographical area, the highest among the four Himalayan states listed.

A reducing agent is the substance that is itself oxidised while it reduces something else. In hydrazine, N₂H₄, nitrogen has an oxidation number of −2; in nitrogen gas, N₂, it is 0.

All three statements describe composite volcanoes, also called stratovolcanoes. Their lava is cooler and more viscous than basalt, so gas cannot escape easily and pressure builds up until the volcano erupts explosively.

World Humanitarian Day is marked every year on 19 August to honour aid workers who have been killed or injured while helping others, and to draw attention to people affected by crises.

A p-type semiconductor is made by adding a small amount of a trivalent impurity, such as boron, aluminium, gallium or indium, to pure silicon or germanium.

A stack is a landform made by erosion, not by deposition. Waves attack a headland and open cracks into caves; when caves on both sides meet, a sea arch forms, and when the roof of the arch collapses, the seaward part is left standing as an isolated rock pillar called…

Friction acts along the surfaces in contact, opposite to the direction of motion, not along the line joining the centres of two bodies, so it is non-central.

The Panama Canal cuts across the narrow Isthmus of Panama in Central America and joins the Caribbean Sea, an arm of the Atlantic, with the Gulf of Panama on the Pacific.

An angle of incidence of zero means the ray falls along the normal, that is, perpendicular to the surface. By Snell's law, n₁ sin i = n₂ sin r; if i is zero, sin i is zero, so sin r is also zero and the angle of refraction is zero.