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Chemistry One Liner In English, 1., 2., 3., , 4., 5., 6., 7., 8., 9., 10., 11., , 12., 13., 14., 15., 16., 17., 18., , 19., , 20., , 21., , 22., 23., 24., , Steel contains- 0.1–2 percent carbon, The component of air used in the respiratory, process is- oxygen., The main role of salts in food is- to make a, small amount of hydrochloric acid which, helps in digestion of food., The most commonly used metal by humans is, iron., The main component of cow dung gas is –, Methane, The best fertilizer for plants is- compost, The pH of aqueous solution of hydrochloric acid, can be approximately – 2, The highest element found in rocks and minerals, is- silicon., The gas used to extinguish the fire is carbon, dioxide., The aqueous solution of which gas has a strong, acidic property - sulfur dioxide, The industrial production of aluminum from, bauxite is by industrial process - electrical, decomposition, Hydrogen is made up of acids, hydrogen and, elements - chlorine., The commercial utility of ethylene and styrene is, due to their potential – polymerization, The compound that does not form a clean, solution with water is benzoic acid., Pure alcohol from Sura can be obtained from this, process- Distillation, The highest amount of substance found in ocean, water is- ordinary salt, The gas produced by the fermentation of a sugar, solution is- carbon dioxide., The pH of an aqueous solution of acetic acid is 2, What will be added to it will increase its pH, value- Aqueous ammonia, Natural substance, which is made up of only one, element and from which energy can be obtained, – coal, Water is often not used to extinguish petrol fires, because- water and petrol are inseparable., Petrol forms a layer on the surface of water, Industrial is a group of substances made by, electrical decomposition - caustic soda,, chlorine, aluminum, The gas that pollutes the environment is- sulfur, dioxide., The most important compounds for plant growth, are made of- Nitrogen, How the compound made by heating caustic, soda solution with flaxseed oil is used- soap, , 25. Sulfur dioxide and oxygen are two gases used in, the industrial production of sulfuric acid., 26. By what method can pure water be obtained, from the oceans – distillation, 27. In which process normal salts are obtained from, sea water- evaporation, 28. What happens in the white layer that, accumulates on the heating element of the, electrical equipment used to boil hard water calcium and magnesium salts, 29. Which is the common salt - sodium chloride, 30. After passing through the rocks, what becomes, hard by dissolving in water - calcium carbonate, 31. What is the chemical name of baking soda sodium bicarbonate, 32. Phenomenon used in the process of dialysis, given to patients of diseased kidneys, 33. There is a mixture of gunpowder- nitrate, sulfur, and charcoal., 34. Reagent is the color-bleaching reagent - sulfur, dioxide., 35. The process of heating a solid object directly into, gaseous form is called - Sublimation., 36. Silver helides are used in photography plates, because- they are colorless., 37. Do not sleep near or under trees at night because, trees leave at night........ - Carbon dioxide, 38. Quartz glass is a pure crystalline form of silica, for passing ultraviolet rays in scientific, instruments., 39. The gas used to cook green fruits is- ethylene., 40. The primary gold purity is - 24 carat, 41. Serpasil- is a tranquilizer, 42. Chloroquine is a compound that acts as an- antimalarial drug., 43. The first metal used by humans was- copper, 44. The most malleable metal is- gold, 45. The industrial process of artificially producing, gasoline is called Fisher -Tropsch process., 46. The water of the rivers is hardened by rain water, because - they contain calcium and, magnesium salts., 47. The pH of human blood is approximately- 7.5., 48. Human beings working in asbestos factories, become victims of air pollution. The most, affected part of their body is- the lungs., 49. Dialysis is done on patients who have renal, disorders., 50. Indian Central Drug Research Institute is located, in- Lucknow ., 51. The nature of saliva is- acidic., 52. An object that can be identified by Soft X-Ray fake coins with real coins, 53. The paper can be developed from old, fingerprints - Ninhydrin solution (H2O2)

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54. The maximum concentration of alcohol does not, harm the powers of the human body - 0.9, percent, 55. Anemia is caused due to lack of anemia in the, body- iron, 56. The best way to sterilize the hypodermic syring, is to give the drug by the vaccine in the body leaving it in the alcohol for a short time., 57. Gramine is the most suitable and inexpensive, means for electrification and home cooking –, Biogas, 58. Amongst the substances used as explosivesTNT., 59. Difference between explosion and combustionIn case of explosion the pressure in the, delimited area increases rapidly but nothing, like this happens during combustion, 60. Indian Science Congress Association organizes, sessions - every year, 61. Fluorescent tubes are commonly used substances, - mercury vapor and argon., 62. Commonly used medicine for typhoid ischloromycetin., 63. Ozone is important for mankind as it forms- a, protective cover to prevent ultraviolet rays., 64. Substances related to diseases in the human, system- Antibody, 65. The order of places in India where copper, gold,, iron and coal are found is as follows - Khetdi,, Kolar, Kudremukh, Jharia, 66. The most abundant source of iron is- green, vegetables., 67. Which vitamins cannot work in the system of, human body - provide energy, 68. Runners are given for instantaneous powerglucose, 69. The maximum perishable substance while, cooking food is- Vitamin, 70. Due to which the dough is puffed up in making, bread - the redemption action of carbon, dioxide formed during the fermentation, process, 71. Which element is essentially in all acidsHydrogen, 72. In oil wells, oil, water and gas are in this, ascending order- water, oil, gas, 73. Drinking soda is - acidic by nature, 74. Drugs that prevent infection and weathering are, called- Antiseptic., 75. The process of separating compounds from, mixtures in a specific way is called- refining., 76. Name of the branch of chemical related to the, study of living systems is- Organic chemistry, 77. How does anhydrous calcium chloride workDehydrating agent, , 78. Cholesterol is a fat alcohol found in- living, organisms., 79. The substance that cleans dust and grease from, the surface is called – harmful, 80. To promote fusion (melting), a substance mixed, with metals is- flux, 81. Water that is not foam from Tasani is called hard water, 82. Inert gases - are not chemically reactive, 83. Linseed cake is useful in- feeding animals., 84. Magnesia is the main use - Mild Laxative., 85. To make ethyl alcohol unsuitable for drinking,, what is added to it- Methyl alcohol, 86. D.N.A. What is the unit in- Deoxyribose, 87. The main component of tobacco is- nicotine., 88. The metals to be mixed in gold while making, jewelery are- copper., 89. Who makes utensils for containing strong acids –, glass, 90. The branch of a chemical used to find the actual, quantity of substances is called- Analytical, Chemicals., 91. The point at which solid, liquid and gaseous, forms of a substance co-exist is called- the triple, point., 92. Who has been given the name Antibody substances produced in the blood that inhibit, or destroy the invasion of harmful bacteria, 93. The process of expulsion of water from any, system is called – Dehydration, 94. Riboflavin – Vitamin, 95. The worst air pollution is- from carbon, monoxide., 96. National Chemical Laboratory (NCL) is located in Puna, 97. In which substance maximum amount of, nitrogen is found- urea, 98. Sweat contains- water, salts and waste matter., 99. Soda bicarbonate is useful in extinguishing a fire, because- it decomposes into carbon dioxide, when heated., 100. Pair of organic bases in natural nucleic acids, which are related to hydrogen bonding- adenine, and thiamine, 101. Dung gas mainly consists of- Methane, 102. In heavy water- hydrogen is deuterium instead., 103. Industrial production of polythene is done by, polymerization – ethylene, 104. PVC in plastics industry What is the term used, for - polyvinyl chloride, 105. How many isotopes of hydrogen are – three, 106. Which metal is used in electromagnets - soft, iron, 107. Stainless steel is used to make metals chromium and steel

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108. One gram atom of iron means - 55.8 atomic, mass unit, 109. The reason for the difference in isotopes of an, element is due to the difference in their number –, neutron, 110. The name of the medicine given to prevent, infectious diseases is sulfathiazole., 111. A substance that can be deformed forever by, heat and pressure is called - Thermostat., 112. Contact process involves the reaction of, converting sulfur dioxide into sulfur trioxide –, exothermic, 113. The largest component of atmospheric air is, nitrogen., 114. Whose acetylation can heroin be made fromMorphine, 115. An example of a natural fungicide is – Vyron, 116. The oldest pesticide is nicotine., 117. The carbonic solvent resulting from distillation, of wood is- acetone, methanol, 118. Chemically Insulin .......... – Peptide, 119. Processes that are used to make artificial, enzymes - genetic engineering, synthesis of, crown ethan., 120. Aluminum percolate is used in - hybrid, propellant, 121. Chemically water is - an oxide, 122. A commonly used alcohol to make a detergent is, lauryl alcohol., 123. Flint is in glass - lead chromate, 124. The term exclusion is related to the theory, propounded by which scientist – Pauli, 125. This process is often adopted in the separation of, hydrocarbons found in petroleum - efficient, distillation, 126. Common bacterial ointment is the yellow solid, material used in the bandage- iodoform, 127. Raspberry form is white spiritite - a mixture of, petroleum hydrocarbons., 128. . ............ sodium is a binary compound - sodium, nitrate, 129. In the treatment of some specific types of, antibiotic, which is called mitomadicin, cancer, is used., 130. The reason for water being unusually high is that, of hydrogen sulfide or hydrogen chloride hydrogen bonding., 131. The process of separating the components of a, mixture using the boiling point of variation of, the components of a mixture is called - Prabhaji, distillation., 132. The term 'copper demon' was used to denote, which metallic element- 'Nickel', 133. 'Aqua regia' is a mixture of- HCI and NHO3, , 134. Chemicals used as simple disinfectants and as, component of contraceptive areparaformaldehyde., 135. Coke production from bitumeni coal is of the, following process - Breaking distillation, 136. Insulin controls blood sugar levels, 137. Interferon inhibits kiss- virus, 138. Industrial production of important hormones, somatostatin and somatotropin is done by- by, Recombitant DNA technology, 139. Enzymes used in organic synthesis are mainly, extracted from a microbial source., 140. 'Which are the main components of the chosen, stone mineral- calcium carbonate, 141. The pH of an acidic solution can be ................ 3., 142. Who is more likely to get cancer - oil-refinery,, heavy water, X-rays, dyes and paints, 143. Photochemical smog is the product of smog peroxyacetic nitrate, ozone., 144. What is plentiful in 'Petron crop' (Petrocrop), plants - Hydrocarbons, Proteins, 145. The famous miracle drug for Kaiser, 'Texal' is, extracted from which tree- U (yew), 146. The long form of the periodic table as a function, of which is based on element properties - atomic, number, 147. Iron has a valency in ferric oxide- +3, 148. The atomic number of an element is the number, of .......- Proton in the nucleus., 149. Displays the properties of an element - atomic, number, 150. In which the atomic weight of an element is, expressed as- AMU., 151. The first classification of elements was done New Land, 152. Energy is emitted from the Sun - from nuclear, fusion., 153. The number of electrons in an atom of atomic, number Z and mass number A is – Z, 154. Hydrogen has a tendency to get the configuration, of helium by taking an electron, similar to this, trend - from halogen, 155. Where is Vikram Sara Bhai Space Center –, Thiruvananthapuram, 156. There are two elements in which the number of, electrons are different but whose mass number is, the same is called the isobaric., 157. What are 30Si14, 31P15, 32S16 – Isotones, 158. Which isotope of uranium has the ability to, continue the chain reaction occurring in a nuclear, reactor- U-235, 159. The four chars in diamond are tethered to each, other – tetrahedral, 160. Thiocal rubber - synthetic rubber, 161. Which gas smells of eggs - H2S

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162. Which allotropes of carbon occur in a solid, three-dimensional structure – Diamond, 163. The volume of a certain mass of a gas at 273, ultimate temperature is 25 ml. If the pressure is, kept constant, the volume of the mass of the, same gas at 546 ultimate temperature will be - 50, ml., 164. Which gas cover absorbs harmful ultraviolet, radiation from the sun – ozone, 165. The amount of oxygen that can be obtained from, 90 kg of water is 80 kg., 166. Producer gas is used as a source of fuel and, nitrogen. These gases are obtained - when steam, is passed over the coke, 167. Which gases are used to make soda water - CO2, 168. Hydrogen gases are commonly prepared Hydrogen gases are prepared by the reaction, of pure zinc with dilute H2SO4., 169. By reducing the temperature, all the gases will, occupy zero volume - -2730C, 170. Under what conditions does the Bael rule apply fixed temperature, 171. Which of the following is estimated by checking, the pollution of motor cars at service stations lead and carbon particles, 172. Two balloons are filled with the same gram, atoms as hydrogen and helium, both have holes, of the same size. First of all, which balloon will, be compressed - hydrogen filled balloon, 173. 1 mole is equal to - 6 x 2310, 174. The number of moles in 44.8 liters of CO2 on, N.T.P is- 2, 175. The temperature of a gas increases during its, pressure., 176. 176. Tubes are mainly filled with gas - mercury, vapor and argon., 177. Commonly used flame in gas welding are, neutral, oxidized, carburetic, 178. How many electrons are in the outermost, chamber of inert gas atoms – eight, 179. Which gas makes lime water white - CO2, 180. When an air-filled tire bursts, the air released, will be cold., 181. Carbon dioxide gas comes out of whose burningdiamond, 182. Due to the green house effect, the warming of, the Earth's atmosphere, which is due toInfrared rays, 183. Who is widely used in unconsciousnessChloroform, 184. Which gas is used to kill bacteria- Chlorine, 185. The most common element in all amlohydrogen., 186. Common gas equations are - PV = n RT, 187. The constituent gases of air are generallyNitrogen and oxygen., , 188. Acid rain is mainly due to which gas- SO2, 189. Steam flow on red hot coke is obtained by, burning water gas., 190. What causes temporary hardness of water calcium bicarbonate, 191. The temporary hardness of water can be, corrected by using- Ca(OH)2, 192. The raw materials used in the salvage process for, the manufacture of sodium carbonate include ammonia and carbon dioxide, 193. Reaction of carbon monoxide to H2 at 3000C is, made- Methane, 194. Plaster of Paris - CaSO4.1/2H2O, 195. Aqua Regia is a mixture of- HCL and HNO3, 196. An element forms compounds containing the, formula XCl3X2O5 and Ca3X2 , but does not form, XCl5, which element may be X- N, 197. The basic principle used in the manufacture of a, match is phosphorus., 198. Global warming conditions arise from the, intensity of which gas in the atmosphere hydrogen., 199. Calcium carbide is formed by pouring water on –, acetylene, 200. Aluminum Oxide - Neutral Oxide, 201. What is the process of corrosion of a metal when, it comes in contact with any chemical and, oxygen- oxidation, 202. Alkaline water decomposition of oils and fats, gives soap and glycerol, 203. Water that rubs with soap quickly and gives, more foam - soft water, 204. Urea - Nitrogen Fertilizer, 205. White phosphorus is kept in water., 206. A small pouch of silica gel is kept in medicine, vials containing muffins or capsules - to absorb, moisture., 207. By which process metals are heated –, conduction, 208. What is the use of Vatya furnace for – reduction, 209. The electroplate is always made ......... and the, metal to be mounted on it is always made ........ cathode, anode, 210. From whom can mercury be easily obtainedCinebar, 211. Fuse wire is made of - lead and tin, 212. Which metal star can easily be drawn- Copper, 213. Resides in Amalgam – Hg, 214. Bessemer process is made of – Steel, 215. Thermic welding is a type of fusion welding, 216. What is a strategic metal- Titanium, 217. More than 80 percent welding capacity - Arc, welding, 218. The first synthetic fiber created by Manav was –, Naylaan

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219. Silicon carbide is used to cut valuable hard, objects, 220. Who measures are used to measure – hardness, 221. Felspar Ores – Aluminum, 222. A metal often assumes superconductivity - at, cryogenic temperatures., 223. Which are the fuels of the future – Hydrogen, 224. Complete conversion of glucose to carbon, dioxide in the presence of oxygen and release of, energy in water is called air respiration., 225. Alloys made of stitch .......- glass and tin, 226. Major constituents of Portland cement include Lime, Silica and Alumina, 227. How much carbon is in steel - 0.25-1.5 percent, 228. To increase the protection resistance of steel it is, added to- Chromium, 229. CaOCl2 is the chemical formula for a compound, commonly known as - bleaching powder, 230. What is the nature of metal- neutral, 231. Hematite ore of- Fe, 232. Which is the purest type of coal – anthracite, 233. Stainless steel - chromium, iron, nickel and, carbon, 234. What is Gun Powder - It is a mixture of, potassium nitrate and carbon and sulfur., 235. Who is extracted from commercial vaseline –, petroleum, 236. Pyrex glass is mainly- heat-resistant glass, 237. 'Dichloro-difluoro methane' is found in the, market by which name- Freon-12, 238. Whose common name is washing soda - sodium, carbonate, 239. Nowadays the density of CO2 in the atmosphere, is approximately - 360 in ppm, 240. Which substance is used in storage battery- lead, 241. Steel is increased to provide hardness - the, amount of carbon, 242. The common element of all acids is- hydrogen., 243. Sun has nuclear fuel – hydrogen, 244. Which use is done to remove permanent salinity, of water due to sulfate of metals – zeolites, 245. The bases of four identical kettles are made of, different metals of the same thickness, which, contain the same amount of water, if these kettles, are kept on the same fire (heat) in the same, manner, then water is the first metal of which, Boiled in a made kettle - the copper, 246. Which metal is the best conductor of electricity –, Silver, 247. When steel is dried red hot and cooled slowly,, this process is called – annealing, 248. Which element is used in domestic refrigeratorFreon, 249. The most suitable refrigerant for a commercial, ice plant is- NH3., , 250. Which is used as an anti-freeze in automobile, engines - ethylene glycol, 251. For what purpose is lube oil used in diesel, engines - to reduce friction, to cool the engine., 252. Sodium thiosulfate is used in photography - to, remove unsolicited silver., 253. What is contained in the allogel pill used to, reduce acidity- Aluminum Hydroxide, 254. The components of quartz are silicon and oxygen., 255. The molecules of which substance have the same, type of atoms – oxygen, 256. Friction can be increased by- rough surfaces., 257. Crystalline from the chemical point of view SiO2, 258. Which configuration represents an excellent gas1s2,2s2,2p6, 259. If the pressure on a fluid increases, its- boiling, point increases., 260. The inner surface of food containers is made of, tin and not in zinc, because- zinc is more, functional than tin., 261. Application of alum on the wound stops, bleeding, because- the alum makes the blood, clot, 262. To dilute sulfuric acid, it is recommended to, dilute the acid in water, because- the process of, diluting the acid is highly exothermic., 263. Mercury - Liquid Metal, 264. Who is treated with the help of rheumatic heart, disease- Aspirin, 265. An example of a covalent molecule is- carbon, tetrachloride., 266. Iron nails are immersed in blue copper sulphate, solution. After some time, the iron nails do not, dissolve and the reddish- brown surface of the, copper settles on the nails., 267. Which chemical is used to keep food grains /, food items safe - sodium benzoate, 268. Which substance has the most specific heat –, water, 269. Which pair makes the terminals of ordinary torch, cell - zinc carbon, 270. Which one is used as an antimicrobial for, automatic engines - ethylene glycan, 271. What is the main ingredient of pearl - only, calcium carbonate, 272. Under the cement grinding process, the purpose, of mixing gypsum in the clincher powder is- to, reduce the rate of setting., 273. The main feature of a neutron bomb is that when, dropped on the city, it will cause damage - not to, living creatures, but to buildings., 274. What is wood spirit - methyl alcohol, 275. Which process is followed in the production of, biodiesel - Trans esterification

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276. Which is a property of ammonia - Red litmus in, its aqueous solution turns blue., 277. Bio-degraded waste can be converted into useful, material with the help of – bacteria, 278. Parda Mixture Which of the following are alloys,, which contain mercury., 279. Which of the qualities of non-metals is, commonly found in religion – brittleness, 280. Which are the best fuels in terms of energy saved, by the fuel per gram- Hydrogen, 281. Which of the evanescent has been found, effective in preventing water pollution caused by, industrial effluents - Elephant Grass, 282. Dhoom-Fog is formed by the combination ofSmoke and Fog., 283. Steam ember gas is a mixture of- carbon, monoxide and hydrogen, 284. What causes iron to rust- chemical reaction, with oxygen, chemical reaction with CO2, 285. Who has to remove the work of sewage, treatment churn tank - oil and fatty substances, 286. Chemical substances present in the teeth and, bones are- calcium phosphate., 287. Hemoglobin has maximum affinity - for carbon, mono oxide, 288. There is always a component of an amalgam –, mercury, 289. Stainless steel often contains about 14 percent or, more – chromium, 290. Which chemical used in arts and crafts can cause, anemia and leukemia- Benzene, 291. What causes heavy metal pollution of water –, paint, 292. Yellow spots on citrus leaves are due to the, deficiency of- Magnesium, 293. Which main raw material is used for the, manufacture of rayon – Cellulose, 294. After dissolving 8 grams of NaOH in water and, preparing 250 ml solution, what will be the, molarity of the solution - 0.8, 295. What is the chemical reaction in which heat is, produced- Exothermic reaction, 296. The oxidation numbers of chromium in K2Cr2O7, are - +6, 297. Which acid is used in automobile batteryH2SO4, 298. Any substance which is capable of affecting the, rate of chemical reaction without changing itself, is called- catalyst, 299. Acid is used to write on glass- Hydrochloric, acid, 300. Acid transforms- blue litmus to red, 301. Which of the allotropes of carbon is used in, cutting and deilling – diamond, 302. Who emits a radioactive substance- alpha, particle, beta particle, gamma particle, , 303. The conversion of solid directly into vapor is, called - Sublimation., 304. Who discovered X-Rays - W. Rantagan, 305. Failing solution - ammoniacal copper sulphate, 306. Which alcohols may have the strongest hydrogen, bond – primary, 307. Failing solutions - ammoniacal copper, sulphate, 308. An example of a natural polymer compound iscellulose., 309. There are half-cell reactions., Cu  Cu2 ++ 2e- E = -0.34V, 2Ag  2Ag ++ 2e- E = -0.80V, The electrical carrying force of the sail will be- 0.46v, 310. Calcium carbide reacts with water, which, hydrocarbon gives- Acetylene, 311. When natural rubber is heated with sulfur. This, process is called – Vulcanization, 312. The chemical formula of bleach powder isCa(oh)2, 313. Loss of an electron from a neutral atom, which, process is known as- oxidation., 314. Stanley Steel prevents Corrosion due toChromium, 315. Who gets what by electrolysis of Sodium, Succinate - C2H2, 316. Thiosulfate ion is oxidized to I2 with the, following: S4O6-2, 317. Number of ions present in K3[Fe (CN)6] is – 4, 318. 2-Pentanol and 3-Pentanol can be differentiated, by- Iodoform reaction, 319. An inert gas that was discovered in the Sun, before being discovered on Earth – He, 320. Increased use of which gas is responsible for, global incubation - Carbon dioxide, 321. The main sources of carbon monoxide aretransport., 322. What are synthetic detergents made from sodium salt of benzene sulfonic acid, 323. The maximum permissible concentration of total, hardness in drinking water is – 200, 324. Where is pure metal collected during electrical, refining – anode, 325. Most fuels are carbon compounds - with, hydrogen., 326. The heat energy obtained from the Sun is calledthe nucleus energy, 327. Reaction is heat dependent - the path through, which the maximum product is obtained., 328. Green house gases - CO2, CH4, NO and CFC

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329. How is Dahk Sada – Praswadi, 330. A white solid substance A, on heating, removes a, gas, which turns lime water to milky, the, remaining material remains yellow in hot state,, but turns white when cooled accordingly. What, is solid A- Zinc Carbonate, 331. Iron and manganese are removed from water by, which process - air mixture, 332. Excess fraction of water absorbed by steps is, extracted – transpiration, 333. What are the substances that bring down fever in, the condition of high fever- antipyretic, 334. Sulfuric acid is- anisotropic., 335. What is the function of depressurization in the, treatment of dirty water - removal of suspended, solids, 336. There are two metal ions that cause hardness in, water - calcium, magnesium., 337. Which metals contribute to the bio-magnification, problem in ecology – Mercury, 338. Elements that are not in nature but can be, produced artificially, what is- Plutonium, 339. What is the process involved in the iron ore, fermentation process – oxidation, 340. The diagonal is used to change - the alternating, current into the direct current, 341. Elements having different physical properties but, with similar chemical properties are called asAllotropes, 342. Hexavalent chromium is strongly present in the, exclusion of which - tanning houses, 343. Thermal decomposition is the method followed, for disposal - hazardous waste, 344. Fullerene is a newly discovered crystalline, carbon molecule - 60C atom., 345. Maximum moisture content of composting, mixture for vermicomposting is- 65, 346. The permitted concentrations of residual chlorine, in drinking water, in mg / L, are- 0.2, 347. What is the chemical used to develop, photographic films – hypo, 348. Arsenic pollution - black foot disease, 349. Alcoholic fermentation is made by- yeast., 350. Non-metals found in liquid state are- bromine., 351. The heaviest element found in nature isuranium., 352. Causes of formation of acid rain- air pollution, 353. Who determines the chemical properties of an, element - number of electrons, 354. The worst air polluting substances are- carbon, monoxide., 355. By which Pyla globosa is used as a bio filter to, clean water pollution- Cadmium, 356. Carbohydrate (carbase) whose compounds arecarbon, oxygen and hydrogen., , 357. By which devices can they be shielded from, external magnetic effects - brass shield, 358. By which reaction amides can be converted into, amines – Hoffmann, 359. Which processes are not beneficial to prevent, iron from rusting – annealing, 360. Phenolics as pollutants can be extracted from, dirty water by using- polymer adsorbent, 361. Who is used as the founder in dyeing chromium salts, 362. What is the product of equal weight and valency, of an element- molecular weight, 363. Pencil lead- graphite, 364. Octane numbers are a measure of quality - of, petrol, 365. Fossil fuels are the source of energy through, fermentation to supplement petrol - ethanol., 366. PVC can be obtained by polymerization- vinyl, chloride, 367. In the refrigerator, cooling is generated by- by, the evaporation of a volatile liquid, 368. Itai-itai disease is caused by poisoning byCadmium, 369. Who gives blue color to glass- Cobalt oxide, 370. What is iodized salt - a mixture of potassium, iodide and ordinary salt, 371. In which base order are the basic elements, arranged in the periodic table- Atomic number, 372. A mixture of calcium aluminate and calcium, silicate is called- Cement, 373. Who is considered the pioneer of modern nuclear, theory- John Dalton, 374. By what name is chloro-fluoro carbon- glycerol, 375. In what order are the drilling powers of α, β and, γ in their descending order - γ, β, α, 376. Sodium chloride is commonly known as- the, common salt., 377. The father of India's nuclear power program, was- Dr. Homibhabha, 378. What is called to heat an ore to a lower, temperature than its melting point in the absence, of air- Bharjan, 379. No solid can change its shape easily in, comparison to a liquid, because - in the solid, there is strong internal force., 380. Arthur Kornberg was awarded the Nobel Prize, for his work on - a gene, a polypeptid, hypothesis., 381. Which compound has a minimum value for, octane number - n-heptane, 382. In what form is the relative humidity expressed:, Ratio, 383. According to the special theory of relativity, the, mass of a particle - in relation to a unit,, increases with an increase in velocity.

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384. Application of zinc coating does not cause rust in, iron. This process is called- Corrosion, 385. Magnetite - Fe3O4, 386. Transfer of water - decomposed and condensed, 387. White phosphorus is generally kept underKerosene, 388. For an automatic process, − ΔG is negative., 389. With the help of which the purity of a metal can, be determined - the principle of mass, conservation, 390. In an oxygen molecule, two atoms are bonded by, which- two bonds, 391. 92U238 How many neutrons are in an atom – 146, 392. When placed in it, the volume of the cell, increases – hypersensitivity, 393. Rubber is the product of- Latex, 394. Formic acid is produced by- Red Ant, 395. According to the kinetic theory of gases, at the, absolute zero temperature, the molecules of- the, gas start the motion., 396. The main use of sulfur is in the manufacture ofH2SO4, 397. Greenhouse effect is mainly due to the increase, in the atmosphere - ozone CO2, 398. Linear spectrum produced by- H2- Hydrogen, molecule, 399. Universal solvents are – water, 400. Cryolite - Na3A/F6, 401. What happens in Aqua Regia- 3 parts of, concentrate HCL + 1 part of concentrate, HNO3, 402. Examples of starch are- Polysaccharide, 403. In the periodic table of elements, the radius of an, atom is ......... when moving from left to right in, a period - reduced, 404. Which metals are used to make aircraft and, rockets – aluminum, 405. Graphite used in nuclear reactor is - graphite., 406. What is a commonly used gas in advertising, sign-boards and decorative lights – Chlorine, 407. Who discovered natural radioactivity - Henry, Backerel, 408. Which are the most active metals- Potassium, 409. Which element is found in all organic, compounds – Carbon, 410. What is the chemical name of common saltsodium chloride, 411. Which gas called Marsh gas – Methane, 412. Which is an excellent metal – silver, 413. Which is responsible for the effect of greenhouse, gas on Earth - carbon dioxide and methane, 414. Who was the first scientist to make periodic table, of multivatas – Mendeleev, 415. C12H22O11 is known as- suger, 416. Solid iodine has a color - purplish brown to, black, , 417. What happens in an oxidation reaction- There, are decreases in electrons., 418. What are C6H6 – Benzene, 419. What is called a cloud of dust between the stars, of hydrogen, helium and other ionized gases –, Nebula, 420. Which is the first element that was chemically, discovered by Hanning brand- Phosphorus, 421. Which are the 4 major elements of amino acids carbon, hydrogen, oxygen and nitrogen, 422. Galvanization is a process in which a layer of, zinc is applied on iron objects to protect it from rusting., 423. The nucleus of a hydrogen molecule is made up, of - only one proton., 424. Sulfur is derived from which language – Latin, 425. The main organic acids found in grapes are tartaric acid, 426. Which can be used to remove permanent, hardness of water - sodium carbonate, 427. Which oxide of nitrogen is used in chloroform, solution- Nitrogen peroxide, 428. When milk turns sour, which is produced bylactic acid, 429. What is the common name for solution of, Calcium Hydroxide – Lemonade, 430. The major part of biogas is ......... – Methane, 431. What is the greenhouse gas called laughing gas nitrous oxide, 432. LPG leakage can be easily detected ......... by, spreading in air - ethyl mercaptan, 433. LPG is stored in a domestic gas cylinder in, .......... can be made at - any stage., 434. Antiseptic properties in sabun are found due to, the mixture of- Bithionl (Thapajipavadans), 435. Which metals form a transparent metal mixture, when it is mixed with a metal- mercur, 436. Which of the metals are used in photo filmssilver, 437. Air is a mixture of - elements and compounds, 438. The full name of CFC is – Chlorofluorocarbons, 439. When two liquids do not dissolve in each other, and do not form a solution, what is it called –, immiscible, 440. In the nucleus .......... denotes atomic numberProton, 441. Which element, which is naturally very toxic in, the traditional thermometer, was used- Mercury, 442. What is the chemical name of chalk - calcium, carbonate, 443. What are the chemical formulas of ozone - O3, 444. Sugar in a sugar solution is a …… - dissolved, substance, 445. To provide strength to rubber, to provide, maximum elasticity and durability, what is the

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process of treatment with sulfur and heat –, vulcanization, 446. ................. is used in refrigeration - chlorofluoro, carbon, 447. Methane is known as …… - Marsh Gas, 448. Important elements included in automobile, exhaust are- Lead., 449. Silicon is used to make....... – microchips, 450. Malleable shows the properties of ......- metal, 451. To prevent oil settling due to oxidation at the, frying of potato chips, the gas envelopes are, filled with which gas – nitrogen, 452. What is galvanized iron - zinc coated iron, 453. Who is made of tooth enamel- calcium, phosphate, 454. Who invented the Atom Bomb- J. Robert, Oppenhammer, 455. The third period of the modern Arvat table is the, most electrically positive element, and the most, negative element is - sodium, chlorine., 456. What is the pH value of acid rain - 5.5 or less, 457. Which acid is mainly in curd- Lactic, 458. ................. is one of the states of matter that is, obtained by cooling a gas of very low density, under extremely low temperature - Bose, Einstein Dissolved, 459. Galvanization is a corrosion-resistant process in, which a coating of ........... is used on steel and, iron - zinc., 460. Which process is used in water purificationreverse osmosis, 461. The minimum reactive elements of the periodic, table are- excellent gases., 462. Which gases are used in hot air balloonspropane, 463. What is the purity of the minimum thousandth, part of sterling silver – 925, 464. Which is used for water purification- Emal, 465. What causes the increase of carbon dioxide in, the atmosphere - due to excessive use of fossil, fuels, deforestation, increase in number of, vehicles, 466. Which is one of the measures to tackle global, warming – Afforestatio, 467. The presence of coliform in drinking water, supply is a symptom of ........ - contamination, from human waste., 468. In which process zinc oxide is formed, which, acts as a protection and prevents corrosion –, galvanization, 469. The presence of coliform in drinking water, supply is characterized by - contamination from, human waste., 470. What is found in pure metals in the earth's crust Platinum, 471. Paracetamol is a - painkiller, , 472. The process of industrial production of vegetable, ghee involves – reduction, 473. Oxidation is the process in which - electrons are, lost, 474. Whose mixture does a marine diver use for, breathing - oxygen and helium, 475. What is laundry detergent - a mixture of sodium, salts of high fat acids of natural sources, 476. What is the reason for scavengers to produce, foam with hard water- Calcium and magnesium, salts of sulfonic acid are soluble in water., 477. What are the samples of air - oxygen, nitrogen,, carbon dioxide, water vapor and some inert, gases, 478. Edible oils are converted into vegetable ghee by, which process – hydrogenation, 479. What are chemically diamonds - pure carbon, 480. When two solutions are called isotonic - they, have the same osmotic pressure, 481. LPG is a mixture of - butane and propane., 482. How enzymes are substances- Converts, complex organic molecules into ordinary, substances., 483. Sometimes it has been observed that when we, pour hot milk or water in a glass vessel, it gets, cracked. What is the reason for this - boiled, liquids produce more pressure., 484. What is the absolute zero temperature theoretically the lowest possible temperature, 485. The highest amount of gases in the atmosphere is, - nitrogen., 486. The main chemical substances in animal bones, and teeth are - calcium phosphate., 487. Gases not present in the sample of normal air, are- chlorine., 488. Minimum amount of carbon is - in pitched iron, 489. The acids used in batteries are - sulfuric acid., 490. Acids found in lemons and oranges are - citric, acid., 491. The main compounds formed during the, fermentation of sugars are - ethyl alcohol., 492. Where do we burn wood to make wood coal - in, the absence of air, 493. Natural rubber is added to it to make it stronger, and more stable - sulfur, 494. What is chlorination - putting a little chlorine, in impure water, 495. The gases used to create ammonia are - nitrogen, and hydrogen., 496. The purest form of water is- tap water, 497. Chloromycetin is – antibacterial, 498. Chemically sugarcane sugar- sucrose, 499. How many isotopes of hydrogen are – three, 500. How is a saturated solution at a certain, temperature- unable to dissolve more solid, solutes