RRB Group D GK Questions 2026

The total mass of the reactants equals the total mass of the products, which is exactly what this law states.

More base than acid has been added, so the mixture is basic, and phenolphthalein turns pink in a basic solution.

Lal Bahadur Shastri was born on 2 October 1904 at Mughalsarai in the Varanasi region of Uttar Pradesh, a town now named Pandit Deen Dayal Upadhyaya Nagar; he shares his birthday with Mahatma Gandhi, which is why both are remembered on 2 October.

Agnes Gonxha Bojaxhiu, later Mother Teresa, was born on 26 August 1910 at Skopje, then in the Ottoman Empire and today the capital of North Macedonia.

Birsa Munda was born in 1875 at Ulihatu in the Khunti district of present-day Jharkhand, then part of the Chotanagpur region of Bengal and later Bihar.

Guru Gobind Singh was born in 1666 at Patna in Bihar, while his father Guru Tegh Bahadur was travelling in the east, and the gurdwara Takht Sri Patna Sahib marks the site.

Chandrasekhara Venkata Raman was born in 1888 at Tiruchirappalli in present-day Tamil Nadu and was awarded the Nobel Prize in Physics in 1930 for his work on the scattering of light, the discovery announced on 28 February 1928 that is remembered every year as National Science Day.

Nehru was born on 14 November 1889 and his daughter Indira Gandhi on 19 November 1917, both at Allahabad, now Prayagraj, in the family home that Motilal Nehru named Anand Bhavan.

Dr Rajendra Prasad was born on 3 December 1884 at Ziradei, a village in the Siwan district of Bihar.

Bhagat Singh was born in 1907 at Banga in the Lyallpur district of undivided Punjab. Lyallpur was renamed Faisalabad after Partition and lies in the Punjab province of Pakistan, so the village of his birth is now in Pakistan.

Netaji Subhas Chandra Bose was born on 23 January 1897 at Cuttack in Odisha, where his father Janakinath Bose practised as a lawyer, although the family was Bengali and he was later educated at Calcutta and Cambridge.

Bhimrao Ramji Ambedkar was born on 14 April 1891 at Mhow, a military cantonment town in the Indore region of what is now Madhya Pradesh, where his father was serving in the army.

Mohandas Karamchand Gandhi was born on 2 October 1869 at Porbandar, a coastal town of the Kathiawar region in present-day Gujarat, where his father Karamchand Gandhi served as the diwan of the princely state.

India's first satellite, launched in 1975, was named Aryabhata after the astronomer who wrote the Aryabhatiya in 499 CE, explained day and night by the rotation of the earth on its axis and gave a value of pi equivalent to 3.1416.

The Brihat-trayi or great triad of Ayurveda is made up of the Charaka Samhita on internal medicine, the Sushruta Samhita on surgery and the Ashtanga Hridaya of Vagbhata, who also wrote the Ashtanga Sangraha.

Madhava of Sangamagrama, who lived around the fourteenth and fifteenth centuries, founded the Kerala school of astronomy and mathematics, whose members obtained infinite series expansions for pi and for the sine and cosine, anticipating results that Europe reached much later; Nilakantha Somayaji of the same school wrote the Tantrasamgraha in…

The Sanskrit inscription on the Mehrauli pillar praises a king called Chandra, whom historians identify with the Gupta ruler Chandragupta II Vikramaditya, and the pillar's wrought iron has resisted corrosion for about sixteen centuries because of its phosphorus content and the protective film it forms, which is the standard example…

Kanada founded the Vaisheshika school, which classified the categories of existence and held that material things are made of paramanu, indivisible atoms that combine in pairs and larger groups to form the objects we see; the doctrine was reached by reasoning about divisibility rather than by experiment.

Mahaviracharya was a Jain mathematician of the ninth century associated with the Rashtrakuta court, and his Ganita Sara Sangraha is a systematic treatment of arithmetic operations, fractions, series and the areas and volumes of figures, and it was widely used in south India.

Varahamihira, who lived in the sixth century, summarised five earlier astronomical schools in the Panchasiddhantika, wrote the encyclopaedic Brihat Samhita covering astronomy, omens, architecture, gems and the finding of underground water, and composed the Brihat Jataka on horoscopy.