RRB NTPC GK Questions 2026

An amphoteric oxide reacts with both acids and bases to give a salt and water. Aluminium oxide dissolves in hydrochloric acid to give aluminium chloride and in sodium hydroxide to give sodium aluminate, so it behaves as a base in one case and as an acid in the other.

Benzene has the formula C6H6 and a ring of six carbon atoms, each carrying one hydrogen. Count the sigma bonds first: six carbon-carbon bonds around the ring and six carbon-hydrogen bonds give twelve sigma bonds.

Ethylene, also called ethene, has the formula C2H4, and its two carbon atoms share two pairs of electrons, which is a carbon-carbon double bond made of one sigma and one pi bond; it is the simplest alkene.

In a double displacement reaction two compounds exchange their ions, so both reactants must be compounds. Here hydrogen and oxygen are elements combining to form a single product, water, which makes it a combination reaction and also a combustion and redox reaction, but certainly not a double displacement.

A small quantity of fluoride in drinking water protects teeth against decay, but when the concentration rises above the permissible limit it causes fluorosis.

Water hyacinth is an aquatic weed introduced into India from South America.

The mission, working under the Ministry of Jal Shakti, is the implementing agency of the Namami Gange Programme launched in 2014, and it works through State Ganga Committees and district committees along the river.

The Ganga Action Plan was launched in 1985 to intercept, divert and treat the sewage of the towns along the river, and it was the first programme of its kind in India.

The Water (Prevention and Control of Pollution) Act of 1974 was India’s first comprehensive law on pollution.

When fertilisers, detergents and sewage add nitrates and phosphates to a lake or a slow-moving river, algae multiply into a bloom that covers the surface.

Nitrate from fertiliser run-off and from sewage seeps into groundwater; in an infant it is converted to nitrite, which binds to haemoglobin and forms methaemoglobin, a compound that cannot carry oxygen.

Biochemical oxygen demand measures the oxygen that micro-organisms need in order to break down the organic matter present in a sample.

Minamata disease takes its name from Minamata Bay in Japan, where a factory discharged mercury compounds that were converted by bacteria into methylmercury, concentrated in fish through biomagnification and then eaten by people.

Itai-Itai disease was first identified in Japan among people who ate rice grown with water polluted by cadmium from mining waste.

The Punjab and Haryana High Court sits at Chandigarh and serves the States of Punjab and Haryana and the Union Territory of Chandigarh.

It empowers every High Court to issue directions, orders or writs, including habeas corpus, mandamus, prohibition, quo warranto and certiorari, to any person or authority within its territory, for the enforcement of Fundamental Rights "and for any other purpose".

Under Article 217(1), a judge of a High Court holds office until he or she attains the age of 62 years.

Under Article 217(1), every judge of a High Court is appointed by the President by warrant under his or her hand and seal after consultation with the Chief Justice of India, the Governor of the State and, for any judge other than the Chief Justice, the Chief Justice of that…

It was established on 1 July 1862 under the Indian High Courts Act, 1861, which makes it the oldest High Court in India.

Justice M. Fathima Beevi, from Kerala, became the first woman judge of the Supreme Court of India in 1989, nearly forty years after the Court was set up.