Hydrocarbons|Classification Of Hydrocarbons On Class 11th Notes|

Hydrocarbons|Classification Of Hydrocarbons On Class 11th Notes|


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1. In which among the following molecules is the distance between two adjacent carbon atoms largest 


1. Benzene

2. Ethane 

3. Ethene 

4. Ethyene


Ans - 2 - Ethane 


2. Synthetic ethanol is produced by reacting ethene (in the presence of phosphoric acid ) with


1. Hydrogen

2. Potassium dichromate

3. Oxygen 

4. Water ( steam )


Ans - 4 - water (steam)


3. Which is the primary component of natural gas 


1. Methane

2. Butane

3. Propene

4. Ethane


Ans - 1 - Methane


4. Which one of the following allotropes of the carbon is used in cutting and drilling :


1. Diamond

2. Graphite 

3. Activated charcoal

4. Carbon black 


Ans - 1 - Diamond


5. Which is the chemical formula of Marsh gas :


1. Ethane

2. Methane

3. Ammonia 

4. Carbon dioxide


Ans - 2 - Methane 


6. Which one of the following petroleum refinery products has the lowest boiling point : 


1. Kerosene

2. Lubricating oil 

3. Gasoline

4. Diesel 


Ans - 3 - Gasoline


7. Which of the following is an active component of oil of clove ? 


1. Menthol

2. Eugenol

3. Benzaldehyde

4. Methanol


Ans - 2 - Eugenol 


8. Which of the following compounds caused tragedy of Bhopal in 1984 :


1. Phosphene

2. Methyl isocyanate 

3. Carbon Monoxide

4. Methyl cyanate 


Ans - 2 - Methyl isocyanate


9. Hinsberg's reagent is 


1. Benzene sulphonamide

2. Benzene sulphonic acid 

3. Benzene sulphuryl chloride 

4. Benzene sulphonyl chloride


Ans - 4 - Benzene sulphonyl chloride


10. Aminea are more basic than 


1. Alcohol

2. Ethers 

3. Esters 

4. All of these 


Ans - 4 - all of these


11. Which are is the following is the weakest base ?


1. Trimethylamine 

2. Diethylamine 

3. Ethylamine 

4. Ammonia 


Ans - 1 - Trimethylamine 


12. Garbriel phthalimide synthesis is used in the preparation 


1. 1° amine 

2. 2° amine 

3. 3° amine

4. None 


Ans - 1 - 1° amine


13. Fruity smell is given by 


1. Esters 

2. Alcohols 

3. Chloroform 

4. Acid anhydride 


Ans - 1- Esters 


14. Soaps can be classified as 


1. Carbohydrates 

2. Ethers 

3. Salt of fatty acids 

4. None 


Ans - 3 - salt of fatty acids 


15. End of detergent have 


1. Ester group 

2. Aldehyde 

3. Amine group

4. Sodium sulphate 


Ans - 4 - sodium sulphate 


16. A fruity smell is produced by the reaction of ethanol with 


1. PCl5 

2. CH3COCH3

3. CH3COOH

4. None 


Ans - 3 - CH3COOH


17. Sodium acetamide smell like 


1. Garlic 

2. Rotten egg

3. Pleasant 

4. Reminiscent of mice 


Ans - 4 - Reminiscent of mice


18. Paraffin wax is 


1. An ester 

2. A long chain acid 

3. Monohydric alcohol

4. A mixture of higher alkanes 


Ans - 4 - a mixture of higher alkanes 


19. Fat is 


1. A lipid 

2. A protein 

3. A carbohydrate

4. An amino acids 


Ans - 1 - a lipid 


20. Candles contains a mixture of 


1. Bees wax and paraffin wax 

2. Bees wax and stearic acid 

3. Paraffin wax and stearic acid

4. Higher fatty acid 


Ans - 3 - paraffin wax and stearic acid 


21. Bees wax is 


1. Myricyl palmitate 

2. Myricyl stearate

3. Myricyl oleate

4. Mixture of higher hydrocarbon


Ans - 1 - myricyl palmitate


22. Soft soaps are 


1. Sodium salt

2. Calcium salt

3. Magnesium salt 

4. Potassium salt 


Ans - 4 - potassium salt 


23. The process by which vegetable ghee is manufactured is known as 


1. Saponification

2. Hydrogenation 

3. Esterification 

4. Hydrolysis


Ans - 2 - hydrogenation 


24. In the hydrogenation of oil 


1. Ni acts as a promoter 

2. Cu acts as a catalyst 

3. Tellurium acts as a promoter

4. Ni acts as a catalyst 


Ans - 4 - Ni acts as a catalyst


25. An example of heterocyclic compound is : 


1. Benzene 

2. Anthracene 

3. Naphthalene

4. Furan 


Ans - 4 - Furan 


26. A detergent is a 


1. Cleansing agent 

2. Drug 

3. Catalyst

4. Soap 


Ans - 1 - cleansing agent 


27. An aqueous solution of urea is 


1. Acidic 

2. Basic 

3. Neutral 

4. Amphoteric 


Ans - 3 - neutral 


28. Urea is a 


1. Monobasic acid 

2. Dibasic acid 

3. Monoacid base 

4. Diacid base 


Ans - 3 - monoacid base 


29. Urea is converted into ammonia and carbon dioxide by the enzyme 


1. Diastase 

2. Urease 

3. Lipase 

4. Amylase 


Ans - 2 - urease 


30. The percentage of nitrogen in urea it 


1. 46 

2. 23

3. 48

4. 52 


Ans - 1 - 46


31. The reverse of esterification process is called 


1. Neutralisation 

2. Hydrolysis 

3. Acidolysis 

4. Alcoholysis 


Ans - 2 - hydrolysis 


32. The reaction between acid and alcohol is known as 


1. Esterification

2. Saponification 

3. Hydrolysis

4. Hydrogenation


Ans - 1 - esterification


33. Natural rubber is a polymer of 


1. Isoprene 

2. Styrene 

3. Vinyl acetate 

4. Propene 


Ans - 1 - isoprene 


34. Oxalic acid is used : 


Ans - 1. For removing ink stains 

2. For the lab Preparation of formic acid and allyl alcohol 

3. As a mardant in dyeing and calico - printing.


35. Which of the following reagents can be used to test carboxylic group ?


Ans - 1. NaHCO3

2. FeCl3

3. Alcohol in presence of conc. H2SO4.


36. Which of the following is the strongest acid ? 


1. HOCl 

2. HClO3 

3. HClO2

4. HClO4 


Ans - 4 - HClO4 


37. Cyanogen on hydrolysis with dil. HCl gives -


1. Formic acid 

2. Acetic acid 

3. Glycol

4. Oxalic acid 


Ans - 4 - oxalic acid 


38. Vinegar contains 


1. 100% acetic acid 

2. 10% - 20 % acetic acid

3. 1% acetic acid

4. 7 - 8 % acetic acid


Ans - 4 - 7- 8 % acetic acid


39. Rochelle's salt is - 


1. Sodium potassium tartrate 

2. Sodium tartrate 

3. Potassium tartrate

4. Sodium tartrate


Ans - 1 - sodium potassium tartrate


40. Which is tribasic acid - 


1. Succinic acid

2. Tartaric acid 

3. Citric acid

4. Valeric acid 


Ans - 3 - citric acid 


41. Tamarind contains - 


1. Tartaric acid 

2. Lactic acid 

3. Citric acid 

4. Succinic acid 


Ans - 1 - tartaric acid 


42. Lactic acid is - 


1. Propionic acid 

2. a-hydroxy propionic acid 

3. B-hydroxy propionic acid

4. None 


Ans - 2 - a-hydroxy propionic acid


43. Adipic acid is a - 


1. Dibasic acid 

2. Tribasic acid 

3. Monobasic acid 

4. Tetrabasic acid 


Ans - 1 - dibasic acid 


44. Which of the following is used in synthetic lemonade ?


1. Tartaric acid

2. Acetic acid

3. Citric acid

4. Oxalic acid


Ans - 3 - Citric acid


45. Which one of the following is used to remove ink and rust stains on cloth ?


1. Oxalic acid

2. Alcohol

3. Ether 

4. Kerosene oil 


Ans - 1 - oxalic acid


46. Fehling's solution is - 


1. Acidified copper sulphate solution 

2. Ammoniacal cuprous chloride solution

3. Copper sulphate and Rochelle salt + NaOH

4. None


Ans - 3 - Copper sulphate and Rochelle salt + NaOH


47. A plastic bakelite is a compound of HCHO with - 


1. Benzene

2. Phenol

3. Ammonia

4. Hydrocarbon


Ans - 2 - Phenol


48. Urotropine is formed by the action of ammonia on - 


1. Acetaldehyde

2. Formaldehyde

3. Acetone

4. Phenol


Ans - 2 - Formaldehyde


49. Parraldehyde is formed by the polymerisation of - 


1. CH3CHO

2. HCHO

3. CH3OH 

4. (Ch3)2CO


Ans - 1 


50. Which of the following is used as a hypnotic


1. Paraldehyde

2. Metaldehyde

3. Acetaldehyde

4. Formaldehyde


Ans - 1 - Paraldehyde


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51. Paraldehyde is used to - 


1. Medicine 

2. Poison

3. Polymer

4. Dye


Ans - 1 - Medicine


52. Acetone on condensation with chloroform in presence of caustic potash forms - 


1. Chloretone

2. Trichloronitromethane 

3. 1, 1, 1- trichloro - 2 methyl propan - 2 - ol

4. Chloropicrin


Ans - 1 - Chloretone


53. Which of the following is not a fatty acid ?


1. Stearic acid 

2. Palmitic acid 

3. Propionic acid 

4. Phenyl acetic acid 


Ans - 4 - Phenyl acetic acid 


54. Lemon is sour due to 


1. Citric acid 

2. Tartaric acid 

3. Oxalic acid 

4. Acetic acid 


Ans - 1 - Citric acid 


55. Which of the following acids is present in vinegar ? 


1. Hydrochloric acid 

2. Acetic acid

3. Tartaric acid

4. Citric acid


Ans - 2 - Acetic acid


56. Which one among the following fuels is used in gas welding ? 


1. LPG

2. Ethylene 

3. Methane 

4. Acetylene


Ans - 2 - Ethylene


57. Fermentation of ethyl alcohol into acetic acid is done by - 


1. Zymase

2. Diastase

3. Maltase

4. Bacterium mycoderma aceti


Ans - 4 - Bacterium mycoderma aceti


58. Pyroligneous acid contains 


1. 2% acetic acid

2. 50% acetic acid

3. 10% acetic acid

4. 20% acetic acid


Ans - 3 - 10% acetic acid


59. When formic acid reacts with PCl5 , it forms - 


1. Acetyl chloride 

2. Formyl chloride

3. Methyl chloride

4. Propionyl chloride


Ans - 4 - Propionyl chloride


60. A sample of chloroform before using as an anaesthetic , is tested by - 


1. Fehling's solution 

2. Ammoniacal cuprous chloride

3. Ammoniacal silver nitrate solution 

4. Silver nitrate solution after boiling with alcoholic KOH


Ans - 3 - Ammoniacal silver nitrate solution


61. Acetone is mixed with bleaching powder to give - 


1. Chloroform

2. Acetaldehyde

3. Ethanol 

4. Phosgene


Ans - 1 - Chloroform


62. Alcohol obtained in the saponification process is - 


1. Ethyl alcohol

2. Methyl alcohol

3. Wood spirit 

4. Glycerol


Ans - 1 - Ethyl alcohol


63. Chlorofluorocarbons are widely used in 


1. Micro ovens

2. Solar heaters 

3. Washing machines 

4. Refrigerators


Ans - 4 - Refrigerators


64. Rectified spirit contains - 


1. 75% alcohol

2. 95.5% alcohol

3. 56% alcohol

4. 100% alcohol


Ans - 2 - 95.5% alcohol


65. Wine contains : 


1. Methanol

2. Ethanol

3. Propanol

4. Glucose 


Ans - 2 - Ethanol


66. Fermentation is an - 


1. Endothermic reaction

2. Exothermic reaction 

3. Polymerisation reaction

4. Condensation reaction


Ans - 2 - Exothermic reaction


67. Glucose and fructose are converted into ethanol in presence of - 


2. Invertase 

2. Diastase 

3. Zymase 

4. Lipids 


Ans - 3 - Zymase


68. Grain alcohol is common name of 


1. Amyl alcohol

2. Ethyl alcohol 

3. Methanol 

4. None 


Ans - 2 - Ethyl alcohol 


69. Wood spirit is known as 


1. Ethanol

2. Methanol

3. Acetone 

4. Benzene


Ans - 2 - Methanol


70. Ethanol containing some methanol is called - 


1. Methylated spirit

2. Rectified spirit 

3. Absolute spirit

4. None 


Ans - 1 - Methylated spirit


71. Rectified spirit can be dried with 


1. Conc. Sulphuric acid

2. Calcium oxide 

3. Anhydrous calcium chloride

4. Slaked lime 


Ans - 2 - Calcium oxide 


72. Power alcohol is - 


1. Absolute alcohol + methyl alcohol

2. Absolute alcohol + petrol

3. Rectified alcohol + petrol

4. Denatured alcohol + petrol


Ans - 2 - Absolute alcohol + petrol


73. The explosive nitroglycerine is 


1. An ester

2. A salt 

3. A soap

4. A complex compound


Ans - 1 - An ester


74. Which of the following compounds is commonly used as antifreeze in automobile radiators ? 


1. Methanol

2. Ethanol

3. Glycerol 

4. All 


Ans - 3 - Glycerol


75. In cold countries , ethylene glycol is added in the water used in the radiators of cars during winter. This results in - 


1. Lowering in freezing point

2. Reducing the viscosity

3. Reducing the specific heat

4. Making water a better conductor of electricity


Ans - 1 - Lowering in freezing point


76. The group reagent for the test of alcohol is - 


1. Ceric ammonium nitrate 

2. Schiff's reagent 

3. Molisch's reagent

4. Bromine water


Ans - 1 - Ceric ammonium nitrate 


77. The most important ingredient of dynamite is - 


1. Nitrobenzene

2. Picric acid 

3. Nitroglycerine 

4. TNT


Ans - 3 - Nitroglycerine


78. Denatured spirit is mainly used as a 


1. Drug 

2. Good fuel

3. Material in prepairing 

4. Solvent in prepairing varnishes


Ans - 4 - Solvent in prepairing varnishes


79. Which of the following is generally present in tonics : 


1. Ethanol

2. Ether

3. Ethanol

4. Chloral


Ans - 1 - Ethanol


80. Dynamite is prepared by mixing nitroglycerine with - 


1. Saw dust and ammonium nitrate 

2. Cellulose nitrate 

3. Saw dust alone 

4. Conc. Sulphuric acid


Ans - 1 - Saw dust and ammonium nitrate 


81. Liquor poisoning is due to the presence of - 


1. Methyl alcohol

2. Ethyl alcohol

3. Carbonic acid 

4. Bad compound in liquor


Ans - 1 - Methyl alcohol


82. An enzyme which changes maltose into glucose is known as known as 


1. Zymase

2. Maltose

3. Invertase

4. Diastase


Ans - 2 - Maltose


83. Methylated spirit is 


1. 100% alcohol

2. 95.6% alcohol + 4.4% water

3. 90% alcohol + 9% methanol + pyridine

4. Power alcohol


Ans - 3 - 90% alcohol + 9% methanol + pyridine , etc 


84. Denatured spirit is a mixture of ethyl alcohol , methyl alcohol and 


1. Acetic acid

2. Pyridine 

3. Acetone 

4. Water 


Ans - 2 - Pyridine


85. Schiff's reagent is - 


1. Magenta solution decolourised with sulphurous acid 

2. Magenta solution decolourised with chlorine 

3. Ammoniacal cobalt chloride solution

4. Ammoniacal manganese sulphate solution


Ans - 1 - Magenta solution decolourised with sulphurous acid 


86. Tollen' s reagent is : 


1. Alkaline mercuric chloride 

2. Alkaline potassium permanganate 

3. Ammoniacal silver nitrate 

4. Ammonium citrate


Ans - 3 - Ammoniacal silver nitrate 


87. Formaline is the commercial name of 


1. Formic acid 

2. Fluoroform

3. 40% aqueous solution of methanol 

4. Paraformaldehyde


Ans - 3 - 40% aqueous solution of methanol 


88. At room temprature, formaldehyde is 


1. A gas 

2. A liquid 

3. A solid 

4. Not known 


Ans - 1 - A gas


89. The grouping >CO is present in 


1. Ethers 

2. Alcohols

3. Ketones 

4. None 


Ans - 3 - Ketones


90. Ether show isomerism with 


1. Alcohol

2. Acid

3. Halide

4. Aldehyde


Ans - 1 - Alcohol


91. Epichlorohydrin is - 


1. 3 - chloropropane 

2. 3 - chloroprapan -1- ol 

3. 2 - chloromethyl oxirane  

4. None 


Ans - 3 - 2 - chloromethyl oxirane  


92. When ether is exposed in air for sometime , an explosive substance is produced , the substance is 


1. Peroxide 

2. TNT

3. Oxide

4. Superoxide 


Ans - 1 - Peroxide


93. In [18] -- crown -- 6 , the number of oxygen atoms is 


1. 18

2. 6

3. 12

4. 24


Ans - 2 


94. Crown ethers are 


1. Cyclic ethers 

2. Ethers with several other functional groups 

3. Mixed ethers 

4. Not ethers 


Ans - 1 - Cyclic ethers 


95. The optimum temprature for carrying out fermentation of molasses is - 


1. 0°C

2. 30°C

3. 60°C

4. 100°C


Ans - 2 


96. The factor adversely affecting the fermentation process is 


1. Presence of air 

2. Low concentration of sugar 

3. High concentration of sugar 

4. Presence of an enzyme 


Ans - 3 - High concentration of sugar 


97. Chloropicrin is 


1. Picric derivative 

2. Nitrochloroform

3. Nitromethane

4. Nitro ethyl chloride 


Ans - 2 - Nitrochloroform


98. Chemical name of Gammaxane is : 


1. Aniline 

2. Toluene 

3. Benzene hexachloride 

4. Chloro benzene


Ans - 3 - Benzene hexachloride 


99. Reforming is the process used for 


1. Preparation of hydrocarbon 

2. Increasing the octane number

3. Preparation of straight chain 

4. Preparation of aromatic heterocyclic compounds 


Ans - 2 - Increasing the octane number


100. Acetylene is used as an anaesthetic under the name of - 


1. Narcylene 

2. Pyrene

3. Neopyrene

4.  pyroline


Ans - 1 - Narcylene


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101. Lindlar's catalyst is 


1. Pt in ethanol

2. Pd + barium sulphate

3. Ni in ethanol

4. Na in liquid ammonia 


Ans - 2 - Pd + barium sulphate


102. The presence of unsaturation in an organic compound can be tested with - 


1. Schiff's reagent 

2. Tollen's reagent 

3. Fehling's solution 

4. Baeyer's reagent 


Ans - 4 - Baeyer's reagent 


103. The maximum C---C bond length is in 


1. Ethane 

2. Ethene

3. Ethyne

4. Methane 


Ans - 1 - ethane (C2H6)


104. The gas , which is used for welding purposes is - 


1. CH4

2. C2H6

3. C2H4

4. C2H2


Ans - 4 


105. The gas , which is used for artificial ripening of fruit , is


1. Methane

2. Ethene 

3. Ethane 

4. None 


Ans - 2


106. The name of the poisonous gas formed by the interaction of acetylene and arsenic trichloride is 


1. Phosgene 

2. Lewisite

3. Mustard gas 

4. Weston 


Ans - 2 - Lewisite


107. Benzene is a polymer of 


1. Methane 

2. Acetylene

3. Ethane 

4. Ethylene


Ans - 2 - Acetylene


108. Ethylene reacts with sulphur monochloride to form 


1. Ethyl chloride 

2. Ethylene chloride 

3. Mustard gas 

4. Ethylidene chloride


Ans - 3 - Mustard gas


109. Acidic hydrogen is present in 


1. Ethyne 

2. Ethene 

3. Benzene 

4. Ethane 


Ans - 1 - Ethyne


110. Baeyer's reagent is 


1. Alkaline potassium permanganate solution

2. Acidic potassium permanganate solution

3. Neutral potassium permanganate solution 

4. Aqueous bromine solution 


Ans - 1 - Alkaline potassium permanganate solution


111. The most reactive hydrocarbon is 


1. Ethene 

2. Ethyne

3. Ethane 

4. Methane 


Ans - 1 - Ethene


112. Which of the following has highest knocking property ?


1. Aromatic hydrocarbon

2. Olefins 

3. Branched chain paraffins 

4. Straight chain paraffins 


Ans - 4 - Straight chain paraffins 


113. The geometry of methane molecule is 


1. Tetrahedral

2. Pyramidal

3. Octahedral 

4. Square planer 


Ans - 1 - Tetrahedral


114. Which hydrocarbon is mainly present in gobar gas ?


1. Butane 

2. Propane 

3. Methane 

4. Ethane 


Ans - 3 - Methane


115. Octane number is zero for 


1. Iso-heptane

2. n-heptane 

3. Iso-octane 

4. n-octane 


Ans - 2 - n-heptane


116. Catalytic reduction of water gas gives 


1. Acetylene 

2. Ethylene 

3. Ethane 

4. Methane 


Ans - 4 - Methane


117. Adam's catalyst is 


1. Platinum metal

2. Palladium

3. Nickle metal

4. Platinum oxide 


Ans - 4 - Platinum oxide (PtO2)


118. Liquid hydrocarbon is converted into a mixture of gaseous hydrocarbon by 


1. Cracking 

2. Hydrolysis 

3. Oxidation 

4. Distillation 


Ans - 1 - Cracking


119. Paraffin dissolves in 


1. Distilled water 

2. Methanol 

3. Benzene 

4. Salt water 


Ans - 3 - Benzene


120. Domestic cooking gas consists of mostly 


1. Methane and ethane 

2. Liquified butane and iso-butane 

3. Ethylene and carbon monoxide 

4. Hydrogen and acetylene 


Ans - 2 - Liquified butane and iso-butane


121. The flash point in India is fixed at 


1. 44°C 

2. 35°C 

3. 22.8°C 

4. 30°C


Ans - 1 - 44°C


122. Fisher - Tropsch process is used in the manufacture of 


1. Ethane 

2. Benzene

3. Synthetic petrol 

4. LPG


Ans - 3 - Synthetic petrol


123. Octane Number of gasoline can be increased by addition of BTX. BTX stands for - 


1. Butane , tetraethyl lead and xylene 

2. Butane , tetramethyl lead , and xylene 

3. Benzene , toluene and xylene 

4. Benzene , tetraethyl lead and xylene 


Ans - 3 - Benzene , toluene and xylene 


124. Purification of petroleum is carried out by the following method : 


1. Fractional distillation 

2. Steam distillation

3. Vacuum distillation 

4. Simple distillation 


Ans - 1 - Fractional distillation


125. Paraffin wax is 


1. Ester 

2. Alcohol

3. Unsaturated hydrocarbons

4. Saturated hydrocarbons 


Ans - 4 - Saturated hydrocarbons 


126. Which of the following is not linked with methane ?


1. Marsh gas 

2. Natural gas 

3. Producer gas 

4. Coal gas 


Ans - 3 - Producer gas


127. Which of the following compounds has been given an octane number of 100 ?


1. n-hexane 

2. Iso-octane 

3. Neo-pentane 

4. Neo-octane 


Ans - 2 - Iso-octane


128. Octane number of a fuel can be increased by 


1. Isomerisation 

2. Alkylation 

3. Reforming

4. All 


Ans - 4 


129. The thermal decomposition of alkanes is known as 


1. Cracking 

2. Isomerisation

3. Dehydration

4. Reforming 


Ans - 1 - Cracking


130. Ethanol containing 5% water is known as 

1. Absolute alcohol

2. Dilute alcohol

3. Power alcohol

4. Rectified spirit


Ans - 4 - Rectified spirit


131. The fraction obtained between temprature 150-300°C during fractional distillation of crude petroleum is


1. Paraffin wax

2. Heavy oil

3. Kerosene 

4. Naphtha 


Ans - 3 - Kerosene


132. Petroleum consists of 


1. Aliphatic hydrocarbons 

2. Aliphatic alcohols 

3. Aromatic derivatives 

4. None 


Ans - 1 - Aliphatic hydrocarbons


133. Iso-octane is added to petrol :


1. To precipitate inorganic material

2. To prevent freezing of petrol

3. To increase the boiling point

4. As an anti knocking agent


Ans - 1 - As an anti knocking agent


134. Petroleum is found


1. On the surface of the earth 

2. In the atmosphere

3. In arctic ocean

4. Deep under the surface of the earth 


Ans - 4 - Deep under the surface of the earth 


135. The knocking will be minimum when the mixture of fuel is : 


1. Straight chain

2. Iso-carbonation 

3. Neo-carbonation 

4. None


Ans - 3 - Neo-carbonation


136. Knocking sound is produced in the engine when the fuel contains :


1. Water

2. Lubricating oil

3. Straight-chained hydrocarbon

4. Iso-carbon atoms 


Ans - 3 - Straight-chained hydrocarbon


137. Most of hydrocarbons from petroleum are obtained by 


1. Fractional distillation

2. Fractional crystallisation 

3. Vaporisation 

4. Isomerisation 


Ans - 1 - Fractional distillation


138. Kerosene is a mixture of 


1. Aromatic hydrocarbons 

2. Aliphatic hydrocarbons

3. Saturated hydrocarbons

4. Alicyclic hydrocarbons 


Ans - 2 - Aliphatic hydrocarbons


139. What is the volume of oxygen required for the complete combustion of 4 litres of ethane : 


1. 4 litre 

2. 8 litre

3. 12 litre

4. 14 litre


Ans - 4 


140. Carbon black is obtained when methane is 


1. Heated in absence of air 

2. Heated in presence of nitrogen

3. Heated in presence of ammonia 

4. Heated with steam 


Ans - 1 - Heated in absence of air


141. Saturated hydrocarbons undergo


1. Substitution reaction 

2. Addition reaction

3. Polymerisation reaction 

4. Condensation reaction


Ans - 1 - Substitution reaction


142. When water vapours are passed over aluminium carbide , we get 


1. Acetaldehyde 

2. Ethylene 

3. Methane

4. Methyl alcohol 


Ans - 3 - Methane


143. The compound with the highest boiling point is 


1. n-pentane

2. 2 -methylbutane

3. n-hexane 

4. 2,2-dimethylpropane


Ans - 3 - n-hexane


144. Marsh gas mainly contains


1. Ethene

2. Methane 

3. Hydrogen sulphide

4. Carbon Monoxide


Ans - 2 - Methane


145. Which of the following is a chiral carbon : 


1. Methane

2. Methane iodide 

3. Choloromethane 

4. Methyl iodo bromo chloride 


Ans - 4 - Methyl iodo bromo chloride 


146. The name fire damp is given to 


1. Methane 

2. Ethane 

3. Propane

4. Butane 


Ans - 1 - Methane


147. How many chiral carbon atoms present in glucose molecule ?


1. 4

2. 3 

3. 2 

4. 1 


Ans - 1 


148. Chiral molecules are those which are 


1. Superimposable on their mirror image 

2. Not superimposable on their mirror image 

3. Unstable molecules

4. Capable of showing geometrical isomerism 


Ans - 2 - Not superimposable on their mirror image 


149. Optical isomerism is shown by 


1. Oxalic acid 

2. Benzoic acid 

3. Acetic acid 

4. Lactic acid 


Ans - 4 - Lactic acid 


150. Optical isomerism is exhibited by the compound which contains 


1. At least one double bond 

2. At least one triple bond

3. At least one symmetric carbon arom

4. At least one polar group 


Ans - 3 - At least one symmetric carbon arom


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151. Which type of isomerism is shown by diethyl ether and methyl propyl ether : 

1. Chain
2. Functional 
3. Metamerism 
4. Position 

Ans - 3 - Metamerism

152. Isomerism exhibited by acetic acid and methyl formate is 

1. Functional group
2. Chain
3. Position
4. Geometrical 

Ans - 1 - Functional group

153. An isomer of ethanol is 

1. Methanol
2. Acetone
3. Diethyl ether 
4. Dimethyl ether 

Ans - 4 - Dimethyl ether

154. The isomerism observed in alkanes is 

1. Metamerism 
2. Chain isomerism
3. Position isomerism
4. Geometrical isomerism

Ans - 2 - Chain isomerism

155. Compounds having same number and kind of atoms but different arrangement of atoms in their molecules are called : 

1. Allotropes
2. Isotopes
3. Isomers
4. Polymers

Ans - 3 - Isomers

156. The gas produced in marshy places due to decomposition of vegetation is 

1. Carbon Monoxide
2. Carbon dioxide
3. Sulphur dioxide
4. Methane

Ans - 4 - Methane

157. Which of the following are the names of cyclic ether : 

1. Oxirane
2. Epoxy alkane 
3. Alkene oxide 
4. Carbinol

Ans - 1 , 2 & 3 

158. The common name of propanone is 

1. Acetone
2. Dimethyl ketone
3. Ethyl methyl ketone
4. Diethyl ketone

Ans - 2 - Dimethyl ketone

159. The minimum number of carbon atoms which a ketone may contain is : 

1. 1 
2. 2 
3. 3
4. 4

Ans - 3 

160. When chlorine is added to ethylene we get 

1. Ethylidene chloride 
2. Ethyl chloride 
3. Ethylene chlorohydrin 
4. Ethylene chloride 

Ans - 4 - Ethylene chloride 

161. Hexachlorobenzene is known as 

1. Pyrene 
2. Artificial silk
3. Gammexane 
4. Artificial camphor 

Ans - 3 - Gammexane

162. The percentage of nitrogen present in ammonium sulphate is 

1. 18%
2. 21%
3. 25%
4. 30.5%

Ans - 2

163. Which one of the following is the heterocyclic compound ?

1. Pyrene
2. Thiophene
3. Phenol
4. Aniline

Ans - 2 - Thiophene

164. Which of the following is the best scientific method to test presence of water in a liquid ?

1. Smell
2. Taste
3. Use of litmus paper
4. Use of anhydrous copper sulphate 

Ans - 4 - Use of anhydrous copper sulphate

165. Molecular formula of a compound is 

1. 2 × its empirical formula 
2. 3 × its empirical formula 
3. 4 × its empirical formula
4. n × its empirical formula

Ans - 4 - n × its empirical formula

166. Formula which represents a simple ratio of atoms of different element present in a molecule of the substance is called :

1. Molecular formula 
2. Empirical formula
3. Structural formula 
4. None

Ans - 2 - Empirical formula

167. A compound which does not give a positive test in Lassaigne's test for nitrogen is 

1. Urea 
2. Hydrazine 
3. Azobenzene 
4. Phenyl hydrazine 

Ans - 2 - Hydrazine

168. Schiff's method piria method is used for the estimation of :

1. Nitrogen
2. Sulphur 
3. Halogens 
4. Oxygen 

Ans - 3 - Halogens

169. In organic compound , halogens are estimated by 

1. Carius method 
2. Liebig's method 
3. Kjeldahl's method 
4. Duma's method 

Ans - 1 - Carius method

170. Copper wire test of halogens is known as : 

1. Liebig test 
2. Lassaigne test 
3. Fusion test 
4. Beilstein test 

Ans - 4 - Beilstein test

171. Lassaigne test is used for the detection of 

1. Carbon only
2. Hydrogen only
3. Oxygen only
4. Nitrogen , sulphur and halogens 

Ans - 4 - Nitrogen , sulphur and halogens

172. Carbon and hydrogen are estimated in organic compounds by 

1. Kjeldahl method
2. Duma's method 
3. Liebig method 
4. Carius method 

Ans - 3 - Liebig method 

173. Which one of the following can be purified by sublimation 

1. Fluoro
2. Chloro
3. Bromo
4. Iodo 

Ans - 4 - Iodo

174. Which of the following have high electron affinity ?

1. Cl
2. F
3. N
4. O

Ans - 1

175. p - nitrophenol and o - nitrophenol are separated by 

1. Crystallisation
2. Fractional distillation
3. Distillation 
4. Steam distillation

Ans - 4 -  Steam distillation

176. Most of the hydrocarbons from petroleum are obtained by 

1. Pyrolysis
2. Frictional crystallisation 
3. Cracking
4. Frictional distillation

Ans - 4 - Frictional distillation 

177. Silica get is used for keeping away the moisture : 

1. Absorbs water molecules
2. Reacts with water
3. None 

Ans - 1 - Absorbs water molecules

178. A mixture of water and NaCl can be separated by 

1. Sublimation 
2. Evaporation 
3. Decantation
4. Filtration

Ans - 2 - Evaporation

179. Water and alcohol can be separated from a mixture by 

1. Frictional distillation
2. Sublimation
3. Decantation
4. Evaporation

Ans - 1 - Frictional distillation

180. Anthracene is purified by 

1. Filtration
2. Distillation
3. Crystallisation
4. Sublimation

Ans - 4 - Sublimation

181. A mixture of camphor and benzoic acid can be easily separated by 

1. Sublimation
2. Frictional distillation
3. Chemical method 
4. Extraction with solvents 

Ans - 3 - Chemical method

182. Azeotropic mixtures - 

1. Boil at different temprature
2. Are mixtures of solids 
3. Are constant boiling mixtures 
4. None 

Ans - 3 - Are constant boiling mixtures

183. Which of the following elements is found in all organic compounds ?

1. Carbon
2. Calcium 
3. Nitrogen
4. Oxygen 

Ans - 1 - Carbon

184. The chromatography technique was devloped by 

1. Soxhlet
2. Tswett
3. Victor grignard
4. Liebig 

Ans - 2 - Tswett

185. A fractionating column is used in

1. Sublimation 
2. Distillation
3. Fractional distillation
4. Chromatography 

Ans - 3 - Fractional distillation

186. A mixture of naphthalene and benzoic acid can be separated by 

1. Chromatography 
2. Sublimation
3. Fractional crystallisation 
4. Distillation

Ans - 1 - Chromatography

187. Chromatography technique is used for the separation of 

1. Small sample of mixture
2. Plant pigments
3. Dye stuffs 
4. All

Ans - 4 

188. Oils are purified by 

1. Fractional distillation
2. Steam distillation
3. Vaccum distillation
4. Simple distillation

Ans - 2 - Steam distillation

189. Latest technique for purification , isolation and separation of organic compounds is 

1. Chromatography
2. Steam distillation
3. Crystallisation 
4. Vaccum distillation

Ans - 1 - Chromatography

190. Two immiscible liquids are separated by

1. Separating funnel 
2. Fractional distillation
3. Chromatography
4. Sublimation

Ans - 1 - Separating funnel

191. Glycerol is purified by 

1. Steam distillation
2. Vaccum distillation
3. Fractional distillation
4. Simple distillation

Ans - 2 - Vaccum distillation

192. Aniline is separated from a mixture by 

1. Fractional crystallisation 
2. Fractional distillation
3. Vaccum distillation
4. Steam distillation

Ans - 4 - Steam distillation

193. Methanol and acetone can be separated by 

1. Fractional distillation
2. Distillation
3. Steam distillation
4. Vaccum distillation

Ans - 1 - Fractional distillation

194. Naphthalene is a volatile solid ot is best purified by 

1. Crystallisation
2. Distillation
3. Steam distillation
4. Sublimation

Ans - 4 - Fractional distillation

195. Sublimation is a process in which a solid : 

1. Changes into another allotropic form
2. Changes into liquid form 
3. Changes into vapour form
4. None

Ans - 3 - Changes into vapour form

196. The couple between base units of DNA is through 

1. Hydrogen bonding
2. Electrostatic bonding
3. Covalent bonding 
4. Van der Waal's forces 

Ans - 1 - Hydrogen bonding

197. The bond energy of C--C bond in Kcal/mol is : 

1. 58
2. 83
3. 145
4. 192 

Ans - 2

198. Number of pi electrons present in naphthalene is :

1. 4
2. 6
3. 10
4. 14

Ans - 3 

199. All bonds in benzene are equal due to 

1. Resonance
2. Isomerism
3. Tautomerism
4. Inductive effect 

Ans - 1 - Resonance

200. Maximum amount of hydrogen bonding occurs in case of 

1. HF
2. Water 
3. Ethanol
4. Ammonia 

Ans - 1 

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