CDS GK Questions 2026

A constitution can set rules and limits, but it cannot guarantee that good people will enter politics. A constitution is the basic set of rules by which a country is governed.

The trapped steam raises the pressure inside the cooker, and at higher pressure water boils at a higher temperature, so food cooks faster.

Podzolisation is the typical soil-forming process under the cool, moist coniferous forests of the taiga. In the taiga, cold winters slow down decay, and the needles of pine, spruce and fir form an acidic litter on the ground.

Mercury(II) oxide is a red-orange solid, mercury is a liquid metal at room temperature, and oxygen is a gas. This is a thermal decomposition reaction: when mercuric oxide is heated, it breaks down into mercury and oxygen, written with states as 2HgO(s) → 2Hg(l) + O₂(g).

The Second Plan put its stress on basic and heavy industries, not on consumer goods, which were left mainly to small and cottage industries.

One mole of N₂ weighs 28 g, so half a mole weighs 14 g. A nitrogen molecule is made of two nitrogen atoms, each with an atomic mass of 14 u, so its molecular mass is 28 u and its molar mass is 28 g per mole.

Panchsheel says nothing about nuclear weapons; its five principles concern sovereignty, non-aggression, non-interference, equality and peaceful coexistence.

Planck's constant has the dimensions [ML²T⁻¹], exactly those of angular momentum. From E = hf, h = E / f. Energy has dimensions [ML²T⁻²] and frequency has [T⁻¹], so h has [ML²T⁻²] ÷ [T⁻¹] = [ML²T⁻¹], with the SI unit joule-second.

Soft sand gives way slowly, so the person is brought to rest over a longer time and the force on the body is smaller.

A Mach number greater than 1 means the body is moving faster than sound in the surrounding medium. The Mach number is the ratio of a body's speed to the speed of sound in the medium around it, named after the Austrian physicist Ernst Mach.

The Mariana Trench lies in the western Pacific, east of the Mariana Islands and near Guam. It is the deepest known part of the world's oceans.

An object denser than the liquid sinks, and one less dense than the liquid floats. By Archimedes' principle, a body placed in a liquid feels an upward buoyant force equal to the weight of the liquid it displaces.

Milk is a colloid in which tiny droplets of fat are dispersed in water, so it is not uniform at the microscopic level and counts as a heterogeneous mixture.

The apple's gravitational potential energy first becomes kinetic energy as it falls, some is lost as heat to the air on the way, and at impact the rest goes into heating the ground and apple and into sound.

Diamond and graphite are allotropes of the same element, carbon, so their chemical properties are the same; only their physical properties differ.

Jaipal Singh Munda campaigned for a separate state of Jharkhand for the tribal people of Chotanagpur, not for Chhattisgarh. Jaipal Singh, a Munda from Ranchi district, studied at Oxford and won an Oxford Blue in hockey.

In the electrolytic refining of copper, a solution of copper sulphate made acidic with a little dilute sulphuric acid carries the copper ions between the electrodes.

The Constitution does the opposite: Article 18 abolishes titles, so receiving a title is not a Fundamental Right. Article 18 forbids the State from conferring any title other than a military or academic distinction, and bars citizens from accepting a title from a foreign State.

Two ammonium ions, each with a charge of +1, are needed to balance one carbonate ion with a charge of -2.

Putting a soft iron bar inside a solenoid makes the magnetic field much stronger, so the claim that the field stays the same is not correct.