Chemistry 500 + objective questions for all Competitive Exams | Download now
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In this post, 500 + objective questions of chemistry are given. You remember it well and share these questions with your friends.
1. Steel contains- 0.1–2 percent carbon
2. The component of air used in the respiratory process is- oxygen.
3. The main role of salts in food is- to make a small amount of hydrochloric acid which helps in digestion of food.
4. The most commonly used metal by humans is iron.
5. The main component of cow dung gas is – Methane
6. The best fertilizer for plants is- compost 7. The pH of aqueous solution of hydrochloric acid can be approximately – 2 8. The highest element found in rocks and minerals is- silicon.
9. The gas used to extinguish the fire is carbon dioxide.
10. The aqueous solution of which gas has a strong acidic property - sulfur dioxide
11. The industrial production of aluminum from bauxite is by industrial process - electrical decomposition
12. Hydrogen is made up of acids, hydrogen and elements - chlorine.
13. The commercial utility of ethylene and styrene is due to their potential – polymerization
14. The compound that does not form a clean solution with water is benzoic acid. 15. Pure alcohol from Sura can be obtained from this process- Distillation
16. The highest amount of substance found in ocean water is- ordinary salt
17. The gas produced by the fermentation of a sugar solution is- carbon dioxide.
18. The pH of an aqueous solution of acetic acid is 2 What will be added to it will increase its pH value- Aqueous ammonia 19. Natural substance, which is made up of only one element and from which energy can be obtained – coal
20. Water is often not used to extinguish petrol fires because- water and petrol are inseparable. Petrol forms a layer on the surface of water
21. Industrial is a group of substances made by electrical decomposition - caustic soda, chlorine, aluminum
22. The gas that pollutes the environment is- sulfur dioxide.
23. The most important compounds for plant growth are made of- Nitrogen
24. 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- anti- malarial 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)
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 explosives- TNT.
59. Difference between explosion and combustion- In 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 is- chloromycetin.
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 power- glucose
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 acids- Hydrogen
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 work- Dehydrating 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
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 from- Morphine
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 are- paraformaldehyde.
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
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 from- Morphine 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 are- paraformaldehyde. 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
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. 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 burning- diamond
182. Due to the green house effect, the warming of the Earth's atmosphere, which is due to- Infrared rays
183. Who is widely used in unconsciousness- Chloroform
184. Which gas is used to kill bacteria- Chlorine
185. The most common element in all amlo- hydrogen.
186. Common gas equations are - PV = n RT 187. The constituent gases of air are generally- Nitrogen 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 obtained- Cinebar
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
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 refrigerator- Freon
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 gas- 1s2,2s2,2p6
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
For next 250 Questions or all 500+ Questions, please download PDF file...
In this post, 500 + objective questions of chemistry are given. You remember it well and share these questions with your friends.
1. Steel contains- 0.1–2 percent carbon
2. The component of air used in the respiratory process is- oxygen.
3. The main role of salts in food is- to make a small amount of hydrochloric acid which helps in digestion of food.
4. The most commonly used metal by humans is iron.
5. The main component of cow dung gas is – Methane
6. The best fertilizer for plants is- compost 7. The pH of aqueous solution of hydrochloric acid can be approximately – 2 8. The highest element found in rocks and minerals is- silicon.
9. The gas used to extinguish the fire is carbon dioxide.
10. The aqueous solution of which gas has a strong acidic property - sulfur dioxide
11. The industrial production of aluminum from bauxite is by industrial process - electrical decomposition
12. Hydrogen is made up of acids, hydrogen and elements - chlorine.
13. The commercial utility of ethylene and styrene is due to their potential – polymerization
14. The compound that does not form a clean solution with water is benzoic acid. 15. Pure alcohol from Sura can be obtained from this process- Distillation
16. The highest amount of substance found in ocean water is- ordinary salt
17. The gas produced by the fermentation of a sugar solution is- carbon dioxide.
18. The pH of an aqueous solution of acetic acid is 2 What will be added to it will increase its pH value- Aqueous ammonia 19. Natural substance, which is made up of only one element and from which energy can be obtained – coal
20. Water is often not used to extinguish petrol fires because- water and petrol are inseparable. Petrol forms a layer on the surface of water
21. Industrial is a group of substances made by electrical decomposition - caustic soda, chlorine, aluminum
22. The gas that pollutes the environment is- sulfur dioxide.
23. The most important compounds for plant growth are made of- Nitrogen
24. 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- anti- malarial 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)
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 explosives- TNT.
59. Difference between explosion and combustion- In 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 is- chloromycetin.
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 power- glucose
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 acids- Hydrogen
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 work- Dehydrating 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
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 from- Morphine
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 are- paraformaldehyde.
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
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 from- Morphine 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 are- paraformaldehyde. 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
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. 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 burning- diamond
182. Due to the green house effect, the warming of the Earth's atmosphere, which is due to- Infrared rays
183. Who is widely used in unconsciousness- Chloroform
184. Which gas is used to kill bacteria- Chlorine
185. The most common element in all amlo- hydrogen.
186. Common gas equations are - PV = n RT 187. The constituent gases of air are generally- Nitrogen 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 obtained- Cinebar
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
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 refrigerator- Freon
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 gas- 1s2,2s2,2p6
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
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