RRB NTPC GK Questions 2026

A soda-acid extinguisher uses sodium hydrogen carbonate (baking soda) solution and sulphuric acid, which react to release carbon dioxide. In this extinguisher the sulphuric acid is kept in a separate container inside a cylinder filled with sodium hydrogen carbonate solution.

Vivekananda began his famous address at Chicago on 11 September 1893 with the words "Sisters and Brothers of America", and the audience rose in a long ovation.

Nerve impulses are carried by the movement of sodium and potassium ions across the membrane of the nerve cell, so sodium is essential.

Salmonella typhi is a rod-shaped bacterium that causes typhoid fever in human beings. Typhoid spreads through food and water contaminated with the faeces of an infected person.

Magnetic field lines are always closed curves, so the statement that they are open curves is the incorrect one. Outside a magnet, field lines run from the north pole to the south pole; inside the magnet they continue from the south pole back to the north pole, closing the loop.

Lipids, including steroids and the phospholipids of membranes, are made by the smooth endoplasmic reticulum, so a defect there would stop lipid synthesis.

The egg is fertilised to form the zygote, the zygote grows into the embryo, and the ovule carrying the embryo becomes the seed.

The vehicle goes 100 m east and 200√2 m south, and the straight-line distance between start and finish is √(100² + (200√2)²) = 300 m. Each leg starts from rest, so the distance covered is s = ½at².

When light of a suitable frequency falls on a metal and knocks electrons out of it, the process is called photoelectric emission.

Carbon monoxide binds to the haemoglobin of red blood cells to form carboxyhaemoglobin, so the blood can no longer carry oxygen to the tissues.

. Thyroxine sets the body's basal metabolic rate, that is, how fast cells use oxygen and food to release energy.

The refrigerator uses 5 kW × 10 h × 30 days = 1,500 kWh, and at ₹ 4 per kWh that costs ₹ 6,000.

. When quicklime reacts with water a large amount of heat is released, so the reaction is exothermic.

Papaya bears unisexual flowers: a flower has either stamens or a pistil, and male and female flowers usually grow on separate plants.

Pollen grains are formed by meiosis, the division that halves the chromosome number and DNA content of the parent cell.

In free fall all the potential energy turns into kinetic energy, so 625 J = ½ × 0.32 kg × v², which gives v = 62.5 m/s. First change the mass into kilograms: 320 g = 0.32 kg.

The primary spermatocyte is the diploid cell that enters meiosis I and splits into two haploid secondary spermatocytes. Spermatogenesis takes place in the seminiferous tubules of the testes.

The memorandum deals with how the two customs administrations will share, in advance and in electronic form, the data that establishes where goods were produced, since a certificate of origin is what decides whether a consignment can claim the lower duties available under a trade agreement.

The release on the customs memorandum states that the India-New Zealand Free Trade Agreement entered into force from that date, and that the memorandum itself was concluded under the agreement.

The memorandum concerning the electronic exchange of origin data on trade in goods was signed by the CBIC on behalf of India and by the New Zealand Customs Service on the other side, with CBIC Chairman Vivek Chaturvedi and NZCS Comptroller and Chief Executive Christine Stevenson putting their names to…