Q1. Which of the following is commonly present in the acids? (a) Oxygen (b) Hydrogen (c) Sulphur (d) Nitrogen (UPSC Prelims 1981) Answer: (b) Hydrogen Explanation: All acids contain hydrogen ions (H⁺), which are responsible for their acidic properties. When dissolved in water, acids release hydrogen ions, making hydrogen the defining element in acidic compounds. …
Q1. Which of the following statements is true? (a) Both salinity and density of sea increase with depth (b) Both salinity and density of sea decrease with depth (c) Salinity increases but density of sea decreases with depth (d) Salinity decreases but density of sea increases with depth (UPSC Prelims 1981) Answer: (a) Both salinity …
Q1. How the body temperature is maintained ? (a) Due to temperature regulating mechanism located in the base of the brain (b) Due to excessive intake of water (c) Due to regular intake of foods (d) Due to the constant flow of blood in the capillaries (UPSC Prelims 1981) Answer: (a) Due to temperature regulating …
Q1. How dehydration helps in the preservation of food? (a) Growth of micro-organism is checked (b) Nutrients are concentrated (c) Surface of food stuffs becomes hard (d) Chemical reactions stop in the absence of water (UPSC Prelims 1981) Answer: (a) Growth of micro-organism is checked Explanation: Dehydration removes moisture, which is essential for the growth …
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Q1. Identical twins are born when (a) Two sperms fertilise one ovum (b) Two sperms fertilise two ovums simultaneously (c) One sperm fertilises the ovum and zygote divides into two separate cells developing independently (d) One sperm fertilises two ovums (UPSC Prelims 1981) Answer: (c) One sperm fertilises the ovum and zygote divides into two …
Q1. Why did Md-Bin-Tughlak change his capital from Delhi to Hyderabad/Deogiri ? (a) Because he wanted to improve trade in Deccan (b) Because he wanted to spread Islam in the Deccan (c) Because he wanted to punish the people of Delhi (d) Because he wanted to escape from Mongolian invasion (UPSC Prelims 1981) Answer: (d) …
Q1. Why did Gandhiji stop the Non-Cooperation Movement ? (a) Because of Gandhi-Irwin Pact (b) Because the mob turned violent (c) Because he was ordered to do so by the Britishers (d) Because he did not like to continue the movement (UPSC Prelims 1981) Answer: (b) Because the mob turned violent Explanation: Gandhiji called off …
Q1. Who said these words at the time of Quit India Movement—’Do or die’ ? (a) Motilal Nehru (b) Mahatma Gandhi (c) Sardar Patel (d) Subhash Chandra Bose (UPSC Prelims 1981) Answer: (b) Mahatma Gandhi Explanation: During the Quit India Movement in 1942, Mahatma Gandhi gave the iconic call to action: “Do or die”, urging …
Q1. Under whose leadership, the Indian National Army was formed ? (a) Mahatma Gandhi (b) Subhash Chandra Bose (c) Jawaharlal Nehru (d) Gopal Krishna Gokhale (UPSC Prelims 1981) Answer: (b) Subhash Chandra Bose Explanation: The Indian National Army (INA) was formed under the leadership of Subhash Chandra Bose, who sought to liberate India from British …
Q1. Who was the Viceroy when Attlee declared India’s Independence ? (a) Lord Wavell (b) Lord Mountbatten (c) Lord William Bentinck (d) Lord Cornwallis Answer: (a) Lord Wavell Explanation: When Prime Minister Attlee announced the decision to grant India independence in February 1947, Lord Wavell was the Viceroy. He was later succeeded by Lord Mountbatten, …