Fundamental Principles of Organic ChemistryAllotropes of Carbon136Choose the best answerWhich comparison is correct?ADiamond consists of weakly held layers.BGraphite has layers, whereas C₆₀ consists of cage-like molecules.CC₆₀ is an ionic solid.DGraphite contains only pentagonal rings. Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryStructural and Stereoisomerism137Choose the best answerWhich pair does NOT represent structural isomers?ABut-1-ene and But-2-eneBPentane and NeopentaneCEthanol and Dimethyl etherDMaleic acid and Fumaric acid Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryKeto-Enol Tautomerism138Choose the best answerWhich compound cannot undergo ordinary keto-enol tautomerism?AAcetaldehydeBAcetoneCFormaldehydeDAcetylacetone Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryHyperconjugation139Choose the best answerWhich statement about hyperconjugation is correct?AIt stabilizes carbocations and carbon radicals.BIt strongly stabilizes simple alkyl carbanions.CIt destabilizes carbocations only.DIt has no effect on carbon intermediates. Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryBuckminsterfullerene C₆₀140Choose the best answerWhich allotrope of carbon consists of discrete cage-shaped molecules?ADiamondBGraphiteCBuckminsterfullereneDCoal Like 0 Discuss 0Share