RRB NTPC GK Questions 2026

The Council was recognised as a statutory consultative body under this Act, which was notified on 15 May 2026, and the Mumbai session was the first one it held in that new character.

The twenty-first meeting of the Maritime State Development Council was held in Mumbai, where delegates were also taken on study visits to the cruise terminal of the Mumbai Port Authority and to Jawaharlal Nehru Port Authority before the session began.

This statement is wrong: the gravitational force between two bodies depends on their masses and on the distance between them.

Three parts of oxygen-16 and one part of oxygen-18 give an average of (3 × 16 + 1 × 18) ÷ 4 = 66 ÷ 4 = 16.5 u. Isotopes are atoms of the same element with the same atomic number but different mass numbers, because they have different numbers…

In boiling, bubbles of vapour form throughout the liquid; in evaporation, only molecules at the surface escape.

Gypsum (calcium sulphate dihydrate) is not a raw material for glass; it is added to cement to slow down its setting.

Bacteria turn the lactose in milk into lactic acid, a new substance, so souring is a chemical change that cannot be reversed.

One kilowatt-hour is the energy used by a 1 kW appliance running for one hour: 1000 W × 3600 s = 3.6 × 10⁶ J. The joule is too small for household bills, so electricity companies charge in kilowatt-hours, commonly called units.

The rocky planets are dense, the gas giants are light, and Saturn is the least dense planet of all. Earth is the densest planet in the Solar System at about 5.5 g/cm³, with Venus close behind at about 5.2 g/cm³; both are made of rock and metal.

This is the thermite reaction, which is highly exothermic: it gives out so much heat that the iron formed comes out molten.

X-rays have wavelengths from about 0.01 nm to 10 nm, so 1 nm lies well inside the X-ray band. In the electromagnetic spectrum, wavelength decreases from radio waves through microwaves, infrared, visible light and ultraviolet to X-rays and gamma rays.

The element with atomic number 8 is oxygen, which gains two electrons to complete its octet and forms sodium oxide, Na₂O. Oxygen's electrons are arranged as 2, 6, so it needs two more to reach the stable arrangement 2, 8 of neon.

Chemical energy is the energy stored in the bonds that link atoms together in molecules. When a chemical reaction breaks old bonds and forms new ones, this stored energy is released or absorbed.

This statement is wrong: soda glass is the soft glass, while pyrex is a hard borosilicate glass. Ordinary soda-lime glass is made from silica (sand), sodium carbonate and limestone; it softens at a fairly low temperature and is used for windows, bottles and tumblers.

The exosphere, the outermost layer of the atmosphere, is made up mostly of the two lightest gases, hydrogen and helium.

Crude petroleum is a mixture of hydrocarbons with different boiling points, and fractional distillation separates them. In a refinery, crude oil is heated to about 400 °C and its vapour enters a tall fractionating column that is hot at the bottom and cooler towards the top.

The Quaternary, the latest period of the Cenozoic era, is divided into the Pleistocene and the Holocene epochs. The Quaternary began about 2.58 million years ago.

Of all the sunlight that falls on their leaves, green plants fix only about one per cent as chemical energy in food.

Diagnostic laboratories spin blood samples in a centrifuge to separate the plasma or serum from the blood cells. In centrifugation a sample is rotated at high speed, so the denser particles are pushed to the bottom of the tube and the lighter liquid stays on top.

One pascal is defined as a force of one newton acting on an area of one square metre. Pressure is force per unit area, and its SI unit, named after the French scientist Blaise Pascal, is the pascal (Pa): 1 Pa = 1 N/m².