Exam 1

• Organic Chemistry deals about?

  Carbon containing compounds and their properties
• Maximum number of covalent bonds by carbon a in neutral organic compound is:

  4
• Which of the following alkane will have the highest boiling point?

  1. CH4
  2. CH3-CH2-CH3
  3. CH3-CH2-CH2-CH2-CH3
  4. CH3-CH2-CH2-CH2-CH2-CH2-CH3
  5. CH3-CH3

  4
• How do you classify the reaction given here?

  Hydrobromination reaction

  
• Line structure for hexane

  
• Which of the following is a saturated molecule?

  Saturated = cycloalkane (single bonds)

  Unsaturated = cycloalkenes & cycloalkynes
• The dashed line in the structural formula given here represents:

  A covalent bond which is facing away from you

  
• Simplest repeating unit in a polymer is called?

  Monomer
• Are alkanes polar or nonpolar?

  Nonpolar
• The geometry / shape and bond angle around in an alkene carbon (C=C) is?

  Trigonal planar/Planar triangular, 120 degrees
• Which of the following pairs will have the similar physical & chemical properties?

  1. CH3-CH2-Br & CH3-CH2-NH2
  2. CH3-CH2-CN & CH3-CH2-OH
  3. CH3-CH2-OH & CH3-CH2-CH2-OH
  4. CH3-CH2-CH3 & CH3-CH2-CH2-Br
  5. CH3-CH2-OH & CH3-O-CH3

  3
• Which is the major product when you add H2O into 1-pentene?

  CH3-CH(OH)-CH2-CH2-CH3
• Which pair can form structural isomers?

  Alkenes & Cycloalkanes
• Unlike alkanes, alkenes are very reactive. Alkenes = more reactive than alkanes
• Molecular formula C6H14 can have 5 structural isomers. How many of them can be substituted pentanes (compounds containing 5 carbons in a row with one branching)?

  2
• Acceptable IUPAC name for the structure given here is?

  3-methylpentane

  
• Acceptable IUPAC name for the structure given here is?

  4-methyl-1-hexene

  
• Acceptable IUPAC name for the structure given here is?

  4-methyl-2-pentyne

  
• How many moles of H2 are required to make butane from 1-butyne in presence of Pd?

  2 moles of H2
• Combustion of pentane forms CO2 and H2O. How many moles of water will be obtained if you burn two mole of pentanes? (Balance the equation before you answer)

  2 CH3-CH2-CH2-CH2-CH3 + O2 -> CO2 + H2O

  12
• Which of the following has geometrical isomers (cis & trans isomerism)?

  1. CH2=CH-CH2-CH2-CH2-CH3
  2. CH3-CH2-CH=CH-CH2-CH3
  3. C(CH3)2=CH-CH2-CH2-CH2-CH3
  4. CH3-CH-CH2-CH2-CH2=CH2
  5. All of them can form cis and trans isomers

  2
• Predict the major product for the following reaction:

  A

  
• Acceptable IUPAC name for the structure given here is?

  1, 2, 4-trimethylcyclopentene

  
• Hybridization on carbon in alkanes and cycloalkanes is?

  sp3
• Which of the following compound represent para-dimethylbenzene?

  B

  
• How do you classify the reaction given here?

  Addition reaction

  
• Geometric isomerism (cis-trans) is a class of stereoisomer. Which model is NOT possible to convert cis to trans through Carbon-Carbon bond rotation?

  NOT possible

  
• Choose quaternary carbon in the following molecule.

  D

  
• Polymerization reaction is an example for addition reaction. What would be the monomer for the polymer given here?

  A , single bond

  
• Addition reaction is a very common reaction for alkenes, and this of the following will not undergo an addition reaction with H2 / Pt or addition reaction with Br2.

  E

  
• Label the circled functional groups on the structure given below

  1. Alkene
  2. Ether
  3. Alcohol
  4. Amine
  5. Aromatic / Benzene

  
• Alkanes are saturated, meanwhile alkenes and alkynes are unsaturated.
• All hydrocarbons are Non-Polar

  Alkane
• Alkanes & Cycloalkanes

  Single bonds
• Hydrophobic; Insoluble in Water

  Alkane
• Larger the molecule; stronger the London Force
• Lower member of cycloalkanes are more reactive than higher member of cycloalkanes
• 2 Rxn's for Alkanes:

  1. Rxn with Oxygen
  2. Rxn with Halogens (Cl, Br)
• An atom group replaces another atom or group

  Substitution Rxn
• Straight chain; higher boiling point, longer chain