RRB NTPC GK Questions 2026

Mercury in water causes Minamata disease, and excess nitrate causes blue baby syndrome.

Wool is an animal fibre made mainly of the protein keratin. Polymers are giant molecules built from many small repeating units called monomers.

Sucralose is made from ordinary table sugar, sucrose, by changing its molecule. In making sucralose, three hydroxyl (OH) groups of the sucrose molecule are replaced by chlorine atoms.

Tripuri, the modern Tewar near Jabalpur, was the capital of the Kalachuris of Chedi, a dynasty whose strongest kings were Gangeyadeva and his son Karna in the eleventh century.

Sangram Shah, also called Aman Das, was the Gond ruler of Garha-Katanga in the first half of the sixteenth century and is said in tradition to have brought fifty-two garhs, or forts, under his authority, which is why the kingdom is sometimes described as a kingdom of fifty-two forts.

Asaf Khan, a commander serving Akbar, invaded Garha-Katanga in 1564. Rani Durgavati met him in the field, and when she was wounded by arrows and saw the battle turning, she took her own life rather than be captured.

Garha-Katanga, the Gond kingdom around Jabalpur and Mandla, was ruled by Rani Durgavati as regent for her young son Bir Narayan after the early death of her husband Dalpat Shah.

Sher Shah Suri died at Kalinjar in 1545 when a gunpowder explosion during the siege of the fort burned him fatally.

Prithviraj the Third of Ajmer and Delhi attacked the Chandela country in 1182 and defeated Paramardideva, also called Parmal, near Mahoba.

The Kandariya Mahadeva is the largest and the most fully developed temple at Khajuraho, dedicated to Shiva and generally attributed to the reign of Vidyadhara in the first half of the eleventh century.

The Chandelas of Jejakabhukti built the temples of Khajuraho between roughly the middle of the tenth and the middle of the eleventh century, in the Nagara style, with clustered spires rising over a shrine set on a high platform.

Bhoja, the Paramara king of Dhar in the first half of the eleventh century, is credited with a long list of works, of which the Samarangana Sutradhara on architecture and town planning and the Saraswatikanthabharana on poetics are the best known.

The Paramaras ruled Malwa from Dhar from about the ninth century until Alauddin Khalji's army took the country in 1305.

The Udayagiri caves near Vidisha are Gupta rock-cut shrines of the late fourth and early fifth centuries, and the largest panel there shows Varaha, the boar incarnation of Vishnu, raising the earth goddess on his tusk.

The pillar stands at Besnagar beside Vidisha. It was set up in the second century before Christ by Heliodorus, a Greek ambassador sent by Antialcidas, the Indo-Greek king of Taxila, to the court of king Bhagabhadra.

The Mahakaleshwar temple at Ujjain is one of the twelve jyotirlingas, and it is singled out in every list because its lingam faces south, the only one of the twelve to do so; the bhasma aarti performed there before dawn is equally famous.

Avanti was one of the sixteen mahajanapadas of the sixth century before Christ, and it was divided into two parts: the north, ruled from Ujjayini or Ujjain, and the south, ruled from Mahishmati, which is identified with Maheshwar on the Narmada.

Ujjain stands on the Shipra, also written Kshipra, a tributary of the Chambal, and it is on the ghats of this river that the Simhastha, the Kumbh of Ujjain, is held every twelve years.

The relic caskets of Sariputta and Mahamoggallana, the two chief disciples of the Buddha, were found in Stupa 3 at Sanchi, which stands a short distance north-east of the Great Stupa and has a single gateway.

The four toranas that stand at the cardinal points of the Great Stupa were carved in the first century before Christ in the Satavahana period, and an inscription on one of them records the gift of ivory carvers of Vidisha.