Punjab 12th Class Chemistry Chapter 9 Aromatic Hydrocarbons MCQs Test Online Punjab 12th Class Chemistry Chapter 9 Aromatic Hydrocarbons MCQs Test Online 1234567891011121314151617181920Show paginator Hide paginator Question 1 of 20Chemistry 1. Total number of it -electrons in benzene are?126.96.36.199.6Question 1 of 20Question 2 of 20 2. Amongst the following, the compound that can be most readily sulphonated is?1.Chlorobenzene2.Nitrobenzene3.Toluene4.BenzeneQuestion 2 of 20Question 3 of 20 3. During nitration of benzene, the active nitrating agent is?1.HNO32.NO2+3.NO34.NO2-Question 3 of 20Question 4 of 20 4. Aromatic compounds burn with sooty flame because?1.They have high percentage of hydrogen2.They have a ring structure3.They resist reaction with air4.They have high percentage of carbonQuestion 4 of 20Question 5 of 20 5. The electrophile in aromatic sulphonation is?1.HSO4-2.SO3 +3.SO34.H2SO4Question 5 of 20Question 6 of 20 6. The benzene molecule contains?1.Two double bonds2.Delocalized pi-electron charge3.One double bond4.Three double bondsQuestion 6 of 20Question 7 of 20 7. Which compound is the most reactive one?1.ethyne2.Ethane3.Benzene4.None of themQuestion 7 of 20Question 8 of 20 8. Benzene cannot undergo?1.Substitution reactions2.Elimination reactions3.Oxidation reactions 4.Addition reactionsQuestion 8 of 20Question 9 of 20 9. The structure of Benzene is?1.Hexagonal irregular2.Tetrahedral3.Hexagonal planner4.Trigonal plannerQuestion 9 of 20Question 10 of 20 10. Aromatic hydrocarbons are the derivatives of?1.Cyclohexane2.Alkene3.Benzene4.Normal series of ParaffinsQuestion 10 of 20Question 11 of 20 11. C - C bond length in Benzene is?1.1.39 A2.1.20 A3.1.54 A4.1.34AQuestion 11 of 20Question 12 of 20 12. The extra-ordinary stability of benzene molecule is due to?1.That it gives addition reactions2.Cyclic structure 3.That it has three alternate single and double bonds4.Large delocalization of pi - electrons Question 12 of 20Question 13 of 20 13. Aromatic compound give sooty flame because they?1.Resist the reaction with air 2.Contain high percentage of Carbon3.Have stable structure4.Have (a cyclic structure)Question 13 of 20Question 14 of 20 14. Which of the following acid can be used as a catalyst in Friedel-Crafts reactions?1.BeCl22.HNO33.NaCI4.AlCl3Question 14 of 20Question 15 of 20 15. Aromatic hydrocarbons are the derivatives of?1.Cyclohexane2.Alkene3.Normal series of paraffin4.BenzeneQuestion 15 of 20Question 16 of 20 16. Resonance energy of benzene is?1.155Kj/mole2.145Kj/mole 3.140.5 Kj/mole4.150.5 Kj/moleQuestion 16 of 20Question 17 of 20 17. How many resonance structures of benzene are known188.8.131.52.5Question 17 of 20Question 18 of 20 18. Molecule of benzene contains?1.One double bond 2.Delocalized pi-electron charge 3.Two double bonds4.Three double bondsQuestion 18 of 20Question 19 of 20 19. In which compound benzene rings are isolated?1.Anthracene2.Phenathracene 3.Diphenyl methane4.NaphtaleneQuestion 19 of 20Question 20 of 20 20. The conversion of n-hexane into benzene by heating in the presence of Pt is called?1.Rearrangement2.Dealkylation3.Aromatization4.IsomerizationQuestion 20 of 20 Loading... Test By Subject Punjab Test By Topics 12th Class Chemistry You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.