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740+ Chemistry Questions
Important One Liners For All Exams
Q.1. Which of the following is used as a moderator in nuclear reactor?
➥Graphite
Q.2. Which element that does not occur in nature but can be produced artificially?
➥Plutonium
Q.3. Which rocks is transformed into marble?
➥Limestone
Q.4. By which number the quality of gasoline’ sample is determined?
➥By its octane number
Q.5. What is the principal reason for the formation of metamorphic rocks?
➥Extreme heat and pressure
Q.6. Which type of glass is used for making glass reinforced plastic?
➥Quartz glass
Q.7. When temperature is gradually decreased, what is the specific heat of substance?
➥Decreased
Q.8. Which metal is non toxic in nature?
➥Gold
Q.9. Which is the element that has the highest first ionization potential?
➥Nitrogen
Q.10. Which transition metal is in liquid state?
➥Mercury
Q.11. Temporary hardness of water is due to the presence of which thing?
➥Magnesium bicarbonate
Q.12. Which air pollutant affect the nervous system of man?
➥Lead
Q.13. Which oxyacid of halogen has maximum acidic nature?
➥HClO4
Q.14. What is the characteristic odour of garlic?
➥A sulphur compound
Q.15. What can be the maximum duration of totality for a solar eclipse?
➥7 minutes 40 seconds
Q.16. Which of the following is good nuclear fuel? ➥Plutonium-239
Q.17. Which is the essential element in all organic compounds?
➥Carbon
Q.18. Salts of which element pro vide colours to fireworks?
➥Strontiur and barium
Q.19. Leukaemia or blood cancer is characterised by abnormal increase of which cells?
➥White blood cells
Q.20. What does Oxidation involve?
➥Loss of electrons
Q.21. In colourful diamond, Why are different colours present?
➥Due to impurities
Q.22. What is the number of unpaired electrons in carbon atom?
➥2
Q.23. When some detergent is added to water, what will be the surface tension?
➥Increases
Q.24. What is reduction of oxide with carbon at high temperature called?
➥Smelting
Q.25. Conversion of chemical energy into electrical energy occurs in which thing?
➥Battery
Q.26. Purification of petroleum is carried out by which method?
➥Fractional distillation
Q.27. Which petroleum refinery product has the lowest boiling point?
➥Gasoline
Q.28. Which is purest form of iron?
➥Wrought iron
Q.29. Which is used as a coolant in nuclear reactors?
➥Liquid sodium
Q.30. What does M3 include?
➥M1 + T.D
Q.31. Which part of cinchona plant yields quinine?
➥Bark
Q.32. Liquefied Petroleum Gas consists of mainly which gases?
➥Methane, butane and propane
Q.33. Which is the secondary source of light in a fluorescent lamp?
➥Mercury vapour
Q.34. Which elements is obtained from sea weeds?
➥Iodine
Q.35. Which Bacteria convert atmospheric nitrogen into nitrogenous compound?
➥Nitrogen fixing bacteria
Q.36. In fireworks, how is the green flame produced? ➥Because of barium
Q.37. Water will be absorbed by root hairs, then how is when the external medium?
➥Hypotonic
Q.38. Who does a liquid drop tend to assume a spherical shape?
➥Surface tension
Q.39. Which substance does not have a melting point?
➥Glass
Q.40. Which was the first metal used by man?
➥Copper
Q.41. In which city of India, the diurnal range of temperature is maximum?
➥New Delhi
Q.42. What is the Number of water molecules present in Mohr’s salt?
➥8
Q.43. Why are Metals good conductor of heat than insulator?
➥They contain free electrons
Q.44. A mixture of camphor and benzoic acid can be easily separated by which method?
➥Chemical method
Q.45. If a material, placed in a magnetic field is thrown out of it, then how is the material?
➥Diamagnetic
Q.46. In organic compound, halogens are estimated by which method?
➥Carius method
Q.47. To which are Phototrophic and Geotropic movements linked?
➥Auxin
Q.48. A place having an average annual temperature of 27°C and an annual rainfall of over 200 cm.where is this?
➥Singapore
Q.49. Which is the most unreactive gas?
➥Hydrogen
Q.50. Which is the major oil producing area in U.S.A.?
➥Texas-Louisiana belt
Q.51. Which country leads the world in the export of oil?
➥Saudi Arabia
Q.52. With the rise of temperature, what happens in the speed of sound in a gas?
➥Increases
Q.53. The isotopes of chlorine with mass number 35 and 37 exist in which ratio?
➥3:01
Q.54. When the radius of the T.G. coil is decreased, what does happen in its sensitiveness?
➥Increases
Q.55. The United Nations declared 2014 as which International Year?
➥Crystallography
Q.56. Which colloids are solvent loving colloids?
➥Lyophilic
Q.57. The resistance of material increases with temperature. What is this?
➥Metal
Q.58. Which relates to the formation of the Himalayas?
➥Folding of the geosyncline
Q.59. Which material is very hard and very ductile?
➥Nichrome
Q.60. Which was the scientist who was responsible for the rejection of vital force theory?
➥Lavoisier
Q.61. Which award is associated with Agriculture?
➥Bourlog Award
Q.62. Which rays will deflect in electric field?
➥Cathode rays
Q.63. Most of hydrocarbons from petroleum are obtained by which method?
➥Fractional distillation
Q.64. The mass-energy relation is the outcome of which theory?
➥Special theory of relativity
Q.65. If the atmosphere is cooled, what is its capacity for water vapour?
➥Lowered
Q.66. Which alloy used in making heating elements for electric heating devices?
➥Nichrome
Q.67. Which purified oil does Aviation fuel for jet aeroplanes consist?
➥Kerosene
Q.68. Which metal is used for generation of Nuclear Power?
➥Uranium
Q.69. Anantapur district in Andhra Pradesh is famous for which metal?
➥Gold
Q.70. Silver is obtained from the lead & Zinc ares of Zawar mines in which city?
➥Udaipur
Q.71. Which is the best conductor of electricity?
➥Silve
Q.72. Through which material does sound travel slowest?
➥Wood
Q.73. Most of the plants obtain nitrogen from the soil in which from?
➥Nitrates
Q.74. Which polymer is used for making bulletproof material?
➥Polyethylene
Q.75. By which the maximum amount of energy in the present day world is provided?
➥Coal
Q.76. The first law of thermodynamics is concerned with the conservation of which thing?
➥Energy
Q.77. Which country is rich in oil?
➥Indonesia
Q.78. Which are macro-nutrients provided by inorganic fertilizers?
➥Nitrogen, phosphorus and potassium
Q.79. What is the average salt content in a litre of sea water?
➥35 gm
Q.80. In which Tyndall effect is not observed?
➥Sugar solution
Q.81. Which is Nuclease enzyme begin its attack from free end of polynucleotide?
➥Exonuclease
Q.82. Which is electrical circuits used to get smooth de output from a rectified circuit called?
➥Filter
Q.83. Which soil is best suited for cotton?
➥Regur
Q.84. Why is the yellow colour of urine?
➥Due to the presence of urochrome
Q.85. Which stare is the largest producer of coffee?
➥Karnataka
Q.86. Which enzyme changes maltose into glucose?
➥Maltose
Q.87. Which planet has the longest day and the shortest year?
➥Mercury
Q.88. Which polymer is widely used for making bullet proof material?
➥Polyethylene
Q.89. Which three important micronutrients are essential for humans?
➥Copper, zinc and iodine
Q.90. What is the name given to an almost circular coral reef inside which there is a lagoon?
➥Atoll
Q.91. Chocolates can be bad for health because of a high content of which element?
➥Nickel
Q.92. Galvanised iron sheets have a coating of which metal?
➥Zinc
Q.93. Chlorophyll is a naturally occuring chelate compound, what is the central metal in this?
➥Magnesium
Q.94. Chemical name of Washing soda is?
➥Sodium carbonate
Q.95. What will you put into pure water in order to pass electric current through it?
➥Common Salt
Q.96. Which fuel causes minimum environmental pollution?
➥Hydrogen
Q.97. Which hydrocarbon is mainly present in gobar gas?
➥Methane
Q.98. The cause of fractional atomic weights of elements?
➥The presence of Isotopes
Q.99. Which gas has maximum calorific value?
➥Oil gas
Q.100. Phosgene is obtained by the reaction of carbon monoxide and which gas?
➥Chlorine
Q.101. Which petroleum refinery product has the lowest boiling point?
➥Gasoline
Q.102. Which sets indicated the Aeolian process?
➥Corrosion, attrition, deflation
Q.103. Which compound does not contains an OH group?
➥Aldehyde
Q.104. Maximum hydrogen bonding would be observed in which compound?
➥Methanol
Q.105. What are the metallic constituents of hard water?
➥Calcium, magnesium and iron
Q.106. What is the maximum number of hydrogen bonds in a H2O molecule?
➥4
Q.107. The nitrogen percentage is the highest in which fertilizer?
➥Urea
Q.108. Which are the high-temperature superconductors?
➥Ceramic oxides
Q.109. Which Pollutant is produced from vehicles that cause mental diseases?
➥Pb (lead)
Q.110. What makes a lemon sour?
➥Citric acid
Q.111. In which type of coal percentage of carbon is the highest?
➥Anthracite
Q.112. What is formed when white phosphorus is heated at 540 K in the absence of air?
➥Red phosphorus
Q.113. Which acid is used to remove ink and rust stains and cloth?
➥Oxalic acid
Q.114. Which metal is present in photo films?
➥Silver
Q.115. Which is the highest grade of coal whose surface is shining and has the highest calorific value?
➥Anthracite
Q.116. Which is an element which never exhibits positive oxidation state in any of its compounds?
➥Fluorine
Q.117. Blue litmus paper is converted into red in solution of which thing?
➥acid
Q.118. Which is another name of RDX?
➥Cycionite
Q.119. What is the negative logarithmic value of hydrogen on called?
➥pH
Q.120. A bee-sting leaves an acid which causes pain and irritation. which is that injected acid?
➥Methanoic acid
Q.121. In an atomic nucleus, by which force are neutrons and protons held together?
➥Exchange forces
Q.122. By which a mixture of naphthalene and benzoic acid can be separated?
➥Chromatography
Q.123. By which Carbon and hydrogen are estimated in organic compounds?
➥Liebig’s method
Q.124. Which isotope of uranium capable of sustaining chain reactions?
➥U-235
Q.125. Which is natural source of gamma-rays?
➥Radon gas
Q.126. Which is the substance which can act both as an acid and a base?
➥Amphoteric
Q.127. Where is the Smog is likely to occur?
➥Near the industrial areas
Q.128. Which property of the elements is a whole number?
➥Atomic number
Q.129. What are the atoms of the elements which have same number of neutrons called?
➥Isotones
Q.130. What happens to the level of mercury in the barometer tube when it is taken down a coal mine?
➥It rises
Q.131. Which metal is extracted by electrolytic reaction method?
➥Al (Aluminium)
Q.132. Which is the basis of modern periodic table?
➥Atomic number
Q.133. By which can the location and energy of an electron in an atom be specified?
➥Quantum numbers
Q.134. Which is also called Stranger Gas?
➥Xenon
Q.135. Mixture of which pair of gases is the cause of occurrence of most of the explosions in mines?
➥Methane and air
Q.136. Rainwater collected after 30 to 40 minutes of raining is not suitable for drinking why?
➥Because it is acidic
Q.137. What is the poison of honey bee?
➥Acidic
Q.138. Which inorganic precipitate acts as semipermeable membrane?
➥Copper ferrocyonide
Q.139. In which biological process sugar is oxidised to release energy?
➥Respiration
Q.140. To prepare a standard solution of a substance, what is generally used?
➥Measuring flask
Q.141. How does Transfer of heat energy from the sun to the moon take place?
➥By radiation only
Q.142. Which is an active component of oil of clove?
➥Eugenol
Q.143. In methane molecule how are the four hydrogen atoms arranged?
➥As tetrahedral
Q.144. What are Rubies and Sapphires chemically known as?
➥Aluminium oxide
Q.145. Which pair of metals constitutes the lightest metal and the heaviest metal, respectively?
➥Lithium and osmium
Q.146. Energy transferred to a person through gamma rays is measured in by which unit?
➥Roentgens
Q.147. Which element has the lowest electron affinity?
➥Argon
Q.148. What does the emission of ß-particle?
➥Increases the atomic number by one
Q.149. A fruity smell is obtained by the reaction of ethanol with which compound?
➥CH3COOH
Q.150. Which gas do not considered as polluting agent of air?
➥CO2
Q.151. Which compound caused tragedy of Bhopal in 1984?
➥Methyl isocynate
Q.152. Which compound is used as an antichlor?
➥Na2S2O3
Q.153. Which chemical used as a ‘fixer’ in photography?
➥Sodium thiosulphate
Q.154. Which metal has the highest density?
➥Platinum
Q.155. In human body, into which does the pancreas secretes its enzymes?
➥Duodenum
Q.156. Which compound is used in anti-malarial drug?
➥Chloroquin
Q.157. What does Soda water contain?
➥Carbon dioxide
Q.158. Which processe of weathering belongs to both mechanical and chemical weathering?
➥Crystallization
Q.159. What is the main constituent of vinegar?
➥Acetic acid
Q.160. Which compound is used for writing on glass?
➥Hydrogen fluoride
Q.161. Which compound is commonly used as antifreeze in automobile radiators?
➥Glycerol
Q.162. When water vapours are passed over aluminium carbide, what do we get?
➥Methane
Q.163. What are soaps?
➥Sodium or potassium salts of heavier fatty acids
Q.164. Which material is suitable for water purification?
➥Zeolites
Q.165. Which chemical is used in foam fire extinguishers? ➥Aluminium sulphate
Q.166. Which element is with the highest electrical conductivity?
➥Silver
Q.167. During electrolysis, which the species are discharged at cathode?
➥Cations
Q.168. Non-stick cooking utensils are coated with which metal?
➥Teflon
Q.169. Which represents a process of chemical weathering?
➥Hydration and Hydrolysis
Q.170. How can Permanent hardness of water be removed?
➥By adding washing soda
Q.171. Which nuclear particles responsible for holding all nucleons together?
➥Mesons
Q.172. What is generally present in tonics?
➥Ethanol
Q.173. Which component of the atmosphere has increased during the last 200 years?
➥Carbon dioxide
Q.174. What does mixture of CS2 and H2S on passing over heated copper give?
➥Methane
Q.175. Of which metal were the tools and weapons of Harappan civilisation?
➥Copper, tin and bronze
Q.176. Which is associated with the formation of brown air in traffic congested cities?
➥Nitrogen oxide
Q.177. Balloons are filled with which gas?
➥Helium
Q.178. Which are the The best and the poorest conductors of heat respectively?
➥Silver (Ag), and lead (Pb)
Q.179. Which metal is not attacked by the environment?
➥Gold
Q.180. Which colloidal solution is used in photography?
➥Colloidal silver bromite
Q.181. A temperature difference of 25°C is equivalent to a temperature difference of howmany F?
➥45°F
Q.182. A deuterium nucleus consists of which particles?
➥One proton and one neutron
Q.183. How many moles are there in 140 g of Si (atomic mass of silicon is 28)?
➥5
Q.184. Which is used in storage batteries?
➥Lead
Q.185. An element X forms an oxide X03.
➥6
Q.186. Which polymeric material is used for making bullet proof jacket?
➥KEVLAR
Q.187. Which is the main ingredient in cement?
➥Lime stone
Q.188. Which elementis produced when concentrated cinnabar is roasted in the excess of air?
➥Hg
Q.189. Which nuclides having the same number of neutrons but different number of protons or mass number?
➥Isotones
Q.190. Which compound is known as white vitriol?
➥ZnSO4 .7H2O
Q.191. Which environment leads to the occurrence of acid rain?
➥Sulphur dioxide
Q.192. Which type of the fruit formed without fertilisation? ➥Parthenocarpy
Q.193. In vulcanisation, with which the natural rubber is heated?
➥Sulphur
Q.194. Which algae is used as biofertilizer in the production of crop paddy?
➥Blue green algae
Q.195. When lake starts freezing the formation of the ice will start first at which point?
➥Top
Q.196. Which unicellular algae are used as source of oxygen in space research?
➥Chlorella
Q.197. Which is used as a filler in rubber tyres?
➥Carbon black
Q.198. Alcoholic fermentation is brought about the action of which thing?
➥Yeast
Q.199. By whom was the principle of ‘Black hole’ enunciated?
➥S. Chandrashekhar
Q.200. Which gas has maximum colorific value?
➥Oil gas
