Q1. The term ‘West Texas Intermediate’, sometimes found in of A news, refers to a grade of
Correct Answer: (?)
UPSC 2019-I
Q2. Lipstick: Lead (d) The inhaled CO adversely affects the respiratory centre 2. Soft drinks: Brominated vegetable oils in the brain. 3. Chinese fast food: Monosodium glutamate 92. Consider the following : [2011 - I] Which of the pairs given above is/are correctly matched? 1. Carbon dioxide 2.Oxides of nitrogen (a) 1 only (b) 2 and 3 only 3. Oxides of sulphur (c) 1 and 3 only (d) 1, 2 and 3 Which of
Correct Answer: (b)
Ethanol is produced in India from maize, sugarcane, • National Policy on Biofuels 2018 identified following starch, corn grain etc. Maize is easily available and maize is raw materials for biofuel generation: not costly for product as to economic concern. • Molasses, Sugarcane juice, biomass in form of
UPSC 2019-I
Q3. What is the role of ultraviolet (UV) radiation in the water (c) Hydrogen fuel based automobiles purification systems? [2012 - I] (d) Waste to energy technologies 1. It inactivates /kills the harmful microorganisms in water. 100. In India, the use of carbofuran, methyl parathion phorate 2. It removes all the undesirable odours from the water. and triazophos is viewed with apprehension. These 3. It
Correct Answer: (?)
UPSC 2017-I
Q4. Consider the following pairs:
Correct Answer: (?)
UPSC 2010
Q5. Oxides of Hydrogen 2. Oxides of Nitrogen following statements : [2014 - I] 3. Oxides of Sulphur 1. Coalbed methane is the pure methane gas extracted Which of the above causes/cause acid rain? from coal seams, while shale gas is a mixture of propane (a) 1 and 2 only (b) 3 only and butane only that can be extracted from fine- (c) 2 and 3 only (d) 1, 2 and 3 grained sedimentary rocks. 91. Excessive r
Correct Answer: (b)
Ethanol is produced in India from maize, sugarcane, • National Policy on Biofuels 2018 identified following starch, corn grain etc. Maize is easily available and maize is raw materials for biofuel generation: not costly for product as to economic concern. • Molasses, Sugarcane juice, biomass in form of
UPSC 2010
Q6. Given below are the names of four energy crops. Which explanation of A one of them can be cultivated for ethanol ?
Correct Answer: (?)
UPSC 2010
Q7. Some species of plants are insectivorous. Why?
Correct Answer: (b)
Insectivorous plants prey insects because most of the grasses, insectivorous plants grow in those area where there is deficiet of nitrogen in nutrients so they catch insect to fulfil • agriculture residues (Rice straw, cotton stalk, corn its need of nutrients. cobs, saw dust, bagasse etc.) ,
UPSC 2010
Q8. Mon 863 is a variety of maize. It was in the news for the Reason (R) : Polysaccharides are not soluble in water. following reason.
Correct Answer: (b)
Mon 863 is genetically modified variety of maize, which • sugar containing materials like sugar beet, sweet is resistant of corn root worm. sorghum, etc.
UPSC 2009
Q9. Sweet orange plant is propagated by grafting 2. The Chameleon can look ahead with one eye, and at technique. the same time look behind with another. 2. Jasmine plant is propagated by layering technique. Which of these statements is/are correct? Which of the statements given above is/are correct? (a) Only 1 (b) Only 2 (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 (c) Both 1 and 2 (d) N
Correct Answer: (b)
Ethanol is produced in India from maize, sugarcane, • National Policy on Biofuels 2018 identified following starch, corn grain etc. Maize is easily available and maize is raw materials for biofuel generation: not costly for product as to economic concern. • Molasses, Sugarcane juice, biomass in form of
UPSC 2008
Q10. What are Rubies and Sapphires chemically known as? 63. Which one of the following was used as a chemical weapon
Correct Answer: (d)
Leprosy is caused by Mycobacterium leprae and
UPSC 2008
Q11. Which one of the following is also called Stranger Gas? 64. Which one of the following has the highest fuel value?
Correct Answer: (d)
Normal body temperature of human is 37° C. But when reducing surface area so most succulents have few leaves we convert 37° C into Kelvin it becomes 310 K because 0° C or no leaves. Some desert plants have thorns instead of = 0°C + 273 = 273 K leaves. Thorns do not let the water go out. 37° C = 37° + 273 = 310 K
UPSC 2008
Q12. Which one of the following pairs of metals constitutes the 65. Which one of the following is used as an anti-freeze for the lightest metal and the heaviest metal, respectively?
Correct Answer: (d)
Protein is a complex organic compound of Carbon,
UPSC 2008
Q13. What is Bisphenol A (BPA)?
Correct Answer: (b)
Malaria is the parasitic disease spreads through the Pepsin is an enzyme produced in stomach, which digest protein. sucking of blood through mosquitoes. The malaria parasite Progesterone is a hormone, produced in human ovary. invades blood cells. The virus of encephalitis most active Keratin is a protein. The main component of hair and nail is in brains. Filaria parasite found in blood lymph and leukaemia keratin. is cancer mainly the abnormal cell growth in bone narrow.
UPSC 2008
Q14. Terracing 4. Wind breaks (a) Passion flower plant (b) Pitcher plant Which of the above are considered appropriate methods (c) Night queen (d) Flame of the forest for soil conservation in India. 28. Consider the following statements about probiotic food: (a) 1, 2, and 3 only (b) 2 and 4 only
Correct Answer: (c)
Hormone auxin is responsible to produce seedless affected areas are the symptoms of this disease. This disease tomato fruits. transmitted in moist areas where people walk bare foot.
UPSC 2007
Q15. Oxidation number of S in H S O (a) Iron and tin (b) Lead and tin 2 2 7 C. 4 3. Oxidation number of Ca in CaO (c) Aluminium and lead (d) Aluminium and iron D. 6 4. Oxidation number of Al in NaAlH 49. Which one of the following non-metals is not a poor 4 Codes: conductor of electricity?
Correct Answer: (c)
Living organism require about 27 elements of which 15
UPSC 2007
Q16. Which one among the following is called philosopher’s DIRECTION (Q. 42): The following item consists of two statements. wool?
Correct Answer: (b)
Person having blood group 'AB' is called universal ethylene production can be controlled and shelf life of fruits recepient because the 'AB' blood group has no antibody in can be increased. the blood plasma. So, the person can accept any type of
UPSC 2007
Q17. Which one of the following does not contain silver? 42. Assertion : Synthetic detergents can lather well in hard
Correct Answer: (a)
The amnion is a membrane that protects the developing come under a shock. The plant which has been transplanted embryo by a fluid-filled space called amniotic cavity. Amnion either takes time to readjust to the new soil or dries up and is formed above the embryo. dies due to the root hair loss.
UPSC 2007
Q18. Benzene 2. Carbon tetrachloride D. Environmental Chemistry 3. Sodium carbonate 4. Trichloroethylene 84. The final Agent Orange raid in Vietnam took place in Which of the above/is are used as dry cleaning chemical? 1970– areas have begun to bloom again. But 19 years after (a) 1 only (b) 2 only the war’s end, it seems plain that Agent Orange is killing (c) 1, 2 and 4 only (d) 1, 2, 3 and 4 and maimi
Correct Answer: (b)
Ethanol is produced in India from maize, sugarcane, • National Policy on Biofuels 2018 identified following starch, corn grain etc. Maize is easily available and maize is raw materials for biofuel generation: not costly for product as to economic concern. • Molasses, Sugarcane juice, biomass in form of
UPSC 2005
Q19. Liquefied natural gas (LNG) is liquefied under extremely [2013 - I] cold temperatures and high pressure to facilitate 1. Bagasse can be used as biomass fuel for the generation storage or transportation in specially designed vessels. of energy. 2. First LNG terminal in India was built in Hassan. 2. Molasses can be used as one of the feedstocks for the 3. Natural gas liquids (NGL) are separated from
Correct Answer: (b)
Ethanol is produced in India from maize, sugarcane, • National Policy on Biofuels 2018 identified following starch, corn grain etc. Maize is easily available and maize is raw materials for biofuel generation: not costly for product as to economic concern. • Molasses, Sugarcane juice, biomass in form of
UPSC 2004
Q20. In a given period, electronegativity decreases as the 1. Baking soda is used in fire extinguishers. atomic number increases. 2. Quick lime is used in the manufacture of glass. Which of these statement (s) is/are correct? 3. Gypsum is used in the manufacture of plaster of Paris. (a) 1 only (b) 2 only Which of the statements given above is/are correct? (a) 1 and 2 (b) 2 and 3 (c) 1 only (d) 1, 2 and
Correct Answer: (c)
Hormone auxin is responsible to produce seedless affected areas are the symptoms of this disease. This disease tomato fruits. transmitted in moist areas where people walk bare foot.
UPSC 2003
Q21. Consider the following statements:
Correct Answer: (b)
Spirogyra and Ulothrix are green algae not blue green process. algae. The chameleon can see in both the direction forward Most of algae are used as single cell protein (i.e. Spirulina). and backward at the same time. Different drugs like penicillin is manufactured from fungi
UPSC 2002
Q22. Leaf (a) dichogamy (b) herkogamy C. Wood 3. Stem (c) heterogamy (d) monogamy D. Starch 4. Ovary 19. Consider the following plants
Correct Answer: (c)
Living organism require about 27 elements of which 15
UPSC 2001
Q23. An aqueous solution of copper sulphate is acidic in nature Reason (R) : Oxides of carbon are emitted when coal burns. because the salt undergoes
Correct Answer: (b)
Nostoc fix atmospheric nitrogen and are used as blindness and Haemophilia – Sex linked disease. Sickle cell inoculations for paddy crop. anaemia is a genetic disease in which RBC became sickle
UPSC 2000
Q24. Tin (a) The presence of NaCl increases the rate of setting of B. Solder 2. Nickel plaster of Paris. C. Bleaching powder 3. Sodium (b) Gypsum is added to the cement to slow down its rate D. Hypo 4. Chlorine of setting. (c) All alkaline earth metals form hydrated salts. Codes: (d) Barium and strontium are found free in nature. (a) A-1; B-2; C-4; D-3 (b) A-2; B-1; C-3; D-4 (c) A-1; B-2; C-3; D-4 (d)
Correct Answer: (b)
Ethanol is produced in India from maize, sugarcane, • National Policy on Biofuels 2018 identified following starch, corn grain etc. Maize is easily available and maize is raw materials for biofuel generation: not costly for product as to economic concern. • Molasses, Sugarcane juice, biomass in form of
UPSC 2000
Q25. Aluminium surface are often ‘anodized’. This means the 44. Assertion (A) : In the periodic table of chemical elements, deposition of a layer of
Correct Answer: (b)
Phloem layer of tissue just below the bark is responsible
UPSC 2000
Q26. Production of cement (a) Both A and R are true and R is the correct explanation of A Select the correct answer using the code given below : (b) Both A and R are true but R is not a correct explanation of A (a) 1 and 2 only (b) 2 and 3 only (c) A is true but R is false (c) 1 and 3 only (d) 1, 2 and 3 (d) A is false but R is true C. Organic Chemistry 69. Match List-I (Industrial process) with List-I
Correct Answer: (c)
Hormone auxin is responsible to produce seedless affected areas are the symptoms of this disease. This disease tomato fruits. transmitted in moist areas where people walk bare foot.
UPSC 2000
Q27. Which one of the following organisms can serve as a (a) potassium, manganese, molybdenum and calcium biofertilizer for rice crop?
Correct Answer: (a)
Blue green algae is used as a biofertilizer in rice crop. Blue green algae has the nitrogen fixing ability which
UPSC 2000
Q28. Soft drinks such as colas contain significant quantities of : 4. Match List-I (Physiological processes) with List-II (Cell
Correct Answer: (a)
Cocoa contains caffeine, carbonated water, glucose- are metals. K, Mg, Na and Ca are required in major quantities. fructose, kola extract and caramel colour. Minor quantity of Mn, Fe, Co, Cu, Zn and Mo and trace
UPSC 1998
Q29. Lead, ingested or inhaled, is a health hazard. After the One labeled as the 'Assertion (A)' and the other as 'Reason (R). addition of lead to petrol has been banned, what still are You have to answer this item using the code given below: the sources of lead poisoning ? [2012 - I] 1. Smelting units 2. Pens and pencils 66. Assertion (A): Phenyl is used as a household germicide. 3. Paints 4. Hair oil
Correct Answer: (a)
Thyroxine hormone and tri-iodothyronine hormone Magnesium and – 13% are secreted by thyroid follicular cells of thyroid gland. The ammonium phosphate major component of thyroxine hormone is iodine.
UPSC 1998
Q30. Fly ash can be used as a replacement for some of the (c) effluents (d) evapotranspiration Portland cement concrete. 87. The water pollution in river is measured by the dissolved 3. Fly ash is made up of silicon dioxide and calcium oxide amount of
Correct Answer: (c)
Living organism require about 27 elements of which 15
UPSC 1998
Q31. (c) Zirconium purified metal is primarily used by the nuclear industry to form the outer layer of fuel rods in nuclear reactors. 1. (c) Scintillation counter (scintillometer) : An instrument Zirconium's major use is as cladding for nuclear reactors. It is which measures gamma radiation. It is also used in airborne ideal for this use, as it has a limited ability to capture neutrons, and ground radi
Correct Answer: (b)
After the pollination of ovary, fruit develops gradually present between carbon atoms. The reason is false because from it. unsaturated fats have atleast double bond in their structure. Stem of tree develops to wood.
UPSC 1998
Q32. Which one of the following type of micro organisms is most (a) Bacteria (b) Fungus widely used in industries?
Correct Answer: (d)
Bacteria, microalgae and fungi is most widely used in
UPSC 1998
Q33. Match List-I with List-II and select the correct answer by (a) food (b) mechanical support using the codes given below the lists
Correct Answer: (b)
After the pollination of ovary, fruit develops gradually present between carbon atoms. The reason is false because from it. unsaturated fats have atleast double bond in their structure. Stem of tree develops to wood.
UPSC 1998
Q34. Bougainvillea 2. Carnations (c) A-2; B-3; C-1; D-4 (d) A-4; B-3; C-1; D-2 3. Cocoa 4. Grapes 8. Which one of the following statements regarding starch Which of these plants are propagated by stem cuttings? and cellulose is not correct?
Correct Answer: (b)
Ethanol is produced in India from maize, sugarcane, • National Policy on Biofuels 2018 identified following starch, corn grain etc. Maize is easily available and maize is raw materials for biofuel generation: not costly for product as to economic concern. • Molasses, Sugarcane juice, biomass in form of
UPSC 1997
Q35. Which one of the following is an active component of oil (a) Methane, ethane, propane and butane of clove?
Correct Answer: (d)
Diabetes mellitus is caused due to deficiency of insulin
UPSC 1996
Q36. Physico-chemical characteristics of water in water sources 1. Fly ash can be used in the production of bricks for undergo changes due to
Correct Answer: (?)
UPSC 1996
Q37. It is possible to produce seedless tomato fruits by
Correct Answer: (c)
Hormone auxin is responsible to produce seedless affected areas are the symptoms of this disease. This disease tomato fruits. transmitted in moist areas where people walk bare foot.
UPSC 1996
Q38. Which one of the following is a modified stem?
Correct Answer: (d)
Potato tuber bears buds in small pits known as eyes. mechanical support but not for nutrients. Buds develops to branches. Some of the branches become
UPSC 1995
Q39. Spirogyra 1. Cassava Which of the above is/are used as biofertilizer / biofertilizers? 2. Damaged wheat grains (a) 1 and 2 (b) 2 only 3. Groundnut seeds (c) 2 and 3 (d) 3 only 40. Fruits stored in a cold chamber exhibit longer storage life 4. Horse gram because [2013 - I] 5. Rotten potatoes (a) exposure to sunlight is prevented 6. Sugar beet (b) concentration of carbon dioxide in the environment i
Correct Answer: (c)
Hormone auxin is responsible to produce seedless affected areas are the symptoms of this disease. This disease tomato fruits. transmitted in moist areas where people walk bare foot.
UPSC 1995
Q40. Thorns instead of leaves (1) Diphtheria, Pneumonia and Leprosy: Hereditary Select the correct answer using the codes given below. (2) AIDS, Syphilis and Gonorrhoea: Bacterial (a) 1 and 2 only (b) 2 only (3) Colour blindness, Haemophilia and Sickle cell anaemia: (c) 1 and 3 only (d) 1, 2 and 3 Sex linked 43. Which one of the following is the process involved in (4) Polio, Japanese B encephalitis an
Correct Answer: (c)
Hormone auxin is responsible to produce seedless affected areas are the symptoms of this disease. This disease tomato fruits. transmitted in moist areas where people walk bare foot.
UPSC 1995
Q41. Which one the following group of a plant domesticated in (c) lack of both antigens and antibodies in his blood the new world and introduced into the old world? (d) presence of antibodies in his blood (a) Tobacco, cocoas, and rubber [2019 - I] 51. Which one of the following is a membrane that protects the (b) Tobacco, cotton and rubbers developing embryo from desiccation?
Correct Answer: (a)
Encyclopedia Britannica: In the 15th and 16th healthy for host organism. Lactic acid bacteria, Bifido centuries, during the Columbian Exchange: numerous plants, bacteria are common type of microbes used as probiotics. animals, and microbes from old world (Europe, Asia, and Certain yeast and Bacilli may also useful. Probiotics are Africa) were introduced to the new world (Americas) and commonly consumed as a part of fermented food with vice versa. From the image given in the link, it’s evident th