RRB Group D GK Questions 2026

The law of variable proportions divides short run production into three stages. In stage one, increasing returns, both total and marginal product rise because the fixed factor is still under used.

Nagabhata I founded the Gurjara-Pratihara dynasty in the middle of the eighth century, with his power centred on Avanti and Ujjain in western India.

The Ali brothers, Maulana Muhammad Ali and Shaukat Ali, led the Khilafat Movement that began in 1919. Its demand was that the British restore the position of the Ottoman Sultan, the Caliph, whose empire had been broken up after the First World War by the Treaty of Sevres.

Group 15, the nitrogen family, holds nitrogen, phosphorus, arsenic, antimony and bismuth. Only nitrogen and phosphorus are non-metals; arsenic and antimony are metalloids and bismuth is a metal, so the group has exactly two non-metallic elements.

The blackbuck, called Krishna Jinka in Telugu, is the state animal of Andhra Pradesh. It is an antelope of open grassland and scrub; the male turns dark brown to black with age and carries long spiral horns, while the female stays fawn coloured and usually hornless.

A pH of 11.6 means the soil is strongly alkaline, so it has to be treated with something acidic, and aluminium sulphate is the only acidic compound in the list.

The marginal product of a variable factor first rises, reaches a peak and then falls, so the curve traced out is an inverted U. This is the law of variable proportions at work.

Akbar founded Din-i-Ilahi in 1582, a small spiritual order that he built out of ideas drawn from several faiths.

Nothing is oxidised when a soda bottle is opened; the pressure inside simply falls, the dissolved carbon dioxide becomes less soluble and escapes as bubbles.

In intercropping two or more crops are grown together on the same field at the same time, but sown in a definite pattern of rows, such as a few rows of soyabean between rows of maize, or bajra with lobia.

When electricity is passed through a sealed tube holding neon at low pressure, the gas atoms are excited and give out a bright orange-red glow, which is why advertising signs are still called neon signs.

The capital of Italy was called the Eternal City by Roman poets who believed the city would last whatever happened to its empire, and the Seven Hills, the Palatine, Capitoline, Aventine, Caelian, Esquiline, Quirinal and Viminal, are the heights on which the ancient city grew.

The phrase came into use among jazz musicians and racing writers in the United States in the early twentieth century and was later taken up as a tourism slogan for New York City, which is also called the City of Skyscrapers and the Empire City.

The Maharashtra city earned the title from its long list of colleges, its university and its old tradition of Sanskrit and English learning, which drew students from across western and southern India; it is also called the Queen of the Deccan.

Dhanbad sits on the Jharia coalfield, the chief source of coking coal for Indian steel plants and notorious for an underground fire that has burned for decades, and the city also holds the old Indian School of Mines, founded in 1926.

The capital of West Bengal is called the City of Joy, a name made popular by Dominique Lapierre's book, and the City of Palaces for the grand colonial mansions built when it was the capital of British India; it is also called the Cultural Capital of India.

Also written Alleppey, the town is laced with canals, lagoons and backwater channels crossed by houseboats, and the comparison with Venice is said to have been made by Lord Curzon; it is the home of the Nehru Trophy snake boat race.

The port on the Malabar coast of Kerala was the first European settlement in India and remained the chief trading harbour of the spice coast, which earned it the title Queen of the Arabian Sea; it is also the base of the Southern Naval Command and of the Cochin Shipyard.

The capital of Tamil Nadu and its surrounding belt hold a very large share of India's car, commercial vehicle and auto component manufacturing and export, which is why it is compared with Detroit, the historic motor city of the United States; Chennai is also called the Gateway of South India.

Ahmedabad in Gujarat built up a large cotton textile industry on the model of the English mill town, and the comparison with Manchester, the cotton capital of Britain, stuck; the city is also called the Boston of India and, more recently, the Textile City.