DHS 2022 Grade-4

The Davis Cup is the major international team competition in men’s tennis, organized by the International Tennis Federation.

Under Article 164, the Governor appoints the Chief Minister; conventionally, the person who commands the Assembly majority is invited to form the government.

The Golden Temple (Harmandir Sahib) is situated in Amritsar, Punjab.

Chennai was known as Madras until the city was officially renamed Chennai in 1996.

Namdapha National Park is located in Arunachal Pradesh, in the Eastern Himalayas near the Myanmar border.

Bahadur Shah Zafar II was the last Mughal emperor. The British exiled him after the Revolt of 1857.

Chandragupta Maurya founded the Maurya Empire around 322 BCE, with guidance traditionally attributed to Chanakya (Kautilya).

The Chinese Buddhist pilgrim Xuanzang (Hiuen Tsang) visited India during the reign of Harshavardhana in the 7th century CE.

Jawaharlal Nehru became India’s first Prime Minister on 15 August 1947.

Babur defeated Ibrahim Lodi at the First Battle of Panipat on 21 April 1526, establishing Mughal rule in India.

Coal, petroleum products and natural gas are fossil fuels. Vegetable oil is derived from recent biological material and is renewable.

Combustion generally requires fuel, heat and an oxidizer. In ordinary burning, oxygen supports the reaction.

The cell nucleus contains chromosomes, which consist of DNA and associated proteins and carry hereditary information.

The breast is a mammary gland involved in lactation, not an internal female reproductive organ. The ovary, fallopian tube and uterus are reproductive organs.

Sound is a mechanical wave and requires a material medium; it cannot travel through a vacuum.

Copper is an excellent electrical conductor because it contains mobile electrons; it is widely used in electrical wiring.

The cornea, retina and lens are structures of the eye. Tears are a protective secretion produced by the lacrimal glands, not an anatomical component of the eyeball.

Sirius is a star, the brightest star in the night sky as seen from Earth; Mercury, Saturn and Earth are planets.

Carbon dioxide (CO₂) absorbs and emits infrared radiation and contributes to the greenhouse effect.

Rayon is a manufactured regenerated-cellulose fibre; silk, cotton and jute are natural fibres.