ORGANIC CHEMISTRY (CHM 104) TUTORIAL QUESTIONS

CHM 104 Tutorial Questions Course Title: Introduction to Organic Chemistry 1. _________ and _______ are examples of unsaturated hydrocarbons 2. Alkanes have a general formula of ________________ 3. Coaxial overlap of atomic orbitals produces ………. bonds (a). sigma (b). Psi bond (c). Pi (d). Sie bond 4. Why should carbon atom be the central atom which the chemistry of life and process evolve? This is due to ………. (a). abundance of C (b). structure of carbon atom (c). molecular weight of C atom (d). structure of earth crust 5. Which of these factors explains the key role of carbon in origin and evolution of life? (a). electronic configuration and ability to form covalent bonds (b). atomic weight and electronic factors (c). electronic combination and ionization potential (d). electronic configuration and ground state of carbon 6. Why do we have a wide variety of compounds containing carbon-carbon bonds? This is due to ………….. (a). ionic nature (b). convalent nature (c). valency power (d). cantenation power. 7. All these are importance of organic chemistry except ……….. (a). to understand life processes (b). formation of synthetic fibres (c). formulation of drugs, cosmetics and toiletries (d). construction 8. Give the structure of propanaldehyde ___________ 9. The shape of sp3 hybrid orbitals is ………… (a). octagonal (b). hexagonal (c). tetragonal (d). trigonal 10. Structural isomerism can be subdivided into _____, _____, ______ and ______ 11. Overlapping of sp3 hybrid orbitals give rise to the formation of ……… (a). alkanes (b). alcohols (c). esters (d). alkenes 12. The character of sp3 orbitals is (a).1/4 S-orbital and 3/4 P-orbitals (b). 1/2 S-orbitals and 1/2 P-orbitals (c). 3/4 S-orbitals and 1/4 P-orbitals (d). None of the above. 13. The phenomenon that involves the blending or mixing of two or more orbitals to form equal and identical orbitals is known as ………… (a). isomerization (b). polymerization (c). bonding (d). hybridization. 14.The new orbitals formed in (13) above are called (a). hybrid orbitals (b). isomerized orbitals (c). polymerized orbitals (d). None of the above. 15. ___________ and _________ are examples of alkane 16. Give the IUPAC names of of this compound; CH3 CHOHCH2 OH (a). 1,2,3-propane triol (b). 1,2-propan-1-ol (c). 1,2-propane diol (d). 1,2-propan-2-ol. 17. Aromatic compounds can be divided into ____________ (a). cyclic and acyclic compounds (b). benzene, phenol and toluene (c). benzenoid and non-benzenoid (d). tropolyne and azulene 18. Write the structure of 2,3-dichloropentene. 19. Draw the structure of 2-fluoro-2-methylpropane. 20.Alkanes are used primarily as __________ 21. Alkenes have a general formula of _____________ (a). CnHn (b). CnH2 (c). CnHn-2 (d). CnH2n-2 22.The alkyne group contains how many bond? (a). one (b). two (c). three (d). four 23. The following are uses of alkenes EXCEPT (a). ripening of fruits (b). purification of water (c). production of polymers (d). making of plastics 24. Aromatic hydrocarbons are compounds which contains _____________ (a). benzene ring (b). single bond (c). double bond (d). acyclic hydrocarbon 25. The phenomenon where a compound has the ability to exist with the same molecular formula but different structural formula is known as _____________ (a). aromatization (b). addition reaction (c). isomerism (d). conformation 26. Stereoisomers can be sub-divided into (a). chain and position stereoisomers (b). cis and trans isomers (c). position and functional stereoisomers (d). geometric and optical stereoisomers 27. A type of structural isomer in which the compound have the same molecular formula but different functional groups is called __________ (a). position isomer (b) functional isomers (d). geometric isomers (d). optical isomers 28. In geometric stereoisomerism, ‘‘trans’’ indicates the functional group on the __________ (a). adjacent side (b) same side (c). opposite side (d). left and right side 29. In geometric stereoisomerism, ‘‘cis’’ indicates the functional group on the __________ (a). adjacent side (b) same side (c). opposite side (d). left and right side 30. _______ and _______ are uses of alkenes 31. Eclipsed conformation is a type of conformation in which the atoms or groups attached to the carbon-carbon atom are/have ____ (a). far apart (b). very close to each other (c). a dihedral angle of 60o (d). low potential energy 32. What is the functional group of ketone _____________ 33. What is the functional group of ester _________________ 34. The group –ROR represents _______ (a). ether (b).ketone (c). aldehyde (d). ester 35. The group -RNH2 represents _____ (a). amide (b). amine (c). carboxlic acid (d).ketone 36. Which of these structure represents the compound called dimethyl ether (a) CH3OCH3 (b) CH3OOCH3 (c) –COOR (d) CHO 37. Alkane is also known _____ (a). unsaturated hydrocarbon (b). cyclic compounds (c) olefins (d). parrafins 38. Carbon centre to which four different groups are attached is called _____ (a). enantiomers (b). chiral centre (c). spatial atoms (d). dextrorotatory 39. Trans-1,2-dichloroethene can be represented as ______ (a). (b). (c). (d). 40. Which of the structure represent cis-but-2-ene? (a). (b). (c). (d). 41. CH3CH(CH3)CH2OH is a ________________ alcohol. 42. CH3 CH2CH2CH2NH2 is named as ¬¬¬¬¬¬¬¬¬¬¬¬¬________________ 43. The phenomenon of rotating a plane of polarized light is known as ___________ 44. Polarimeter is an instrument used to ____________ 45. Enantiomers are optical isomers that are ___________ 46. Give the structure of methyl ethanoate 47.which of these alkanes exist as liquid at room temperature? (a). propane (b). pentane (c). ethane (d). dodecane 48. __________ and _________ are examples of haloalkanes 49. The functional group of alcohol is __________ 50. Chain isomers is a type of structural isomerism that can be defined as ___________