Q.1
What is the general formula of the alkenes?
  • CnH2n+1
  • CnH2n+2
  • CnH2n
  • CnH2n+1OH
Q.2
Where in the fractionating column are shorter chain hydrocarbon molecules obtained?
  • At the top
  • At the bottom
Q.3
What is the term given to the process by which longer chain hydrocarbons are broken down into shorter length alkanes and alkenes?
  • fractional distillation
  • evaporation
  • cracking
  • polymerisation
Q.4
When testing for alkenes (unsaturation) bromine water turns from...
  • orange --> blue/black
  • colourless --> pink
  • orange --> colourless
  • orange --> clear
Q.5
Both alkanes and alkenes react rapidly with aqueous bromine at room temperature.
  • True
  • False
Q.6
If an alkene reacts with a halogen, it is known as what type of reaction?
  • Addition
  • Combustion
  • Polymerisation
  • Hydrogenation
Q.7
Molecules collected at the bottom of the fractionating column tend to be...
  • more viscous, less flammable and less volatile
  • less viscous, more flammable and more volatile
  • more viscous, more flammable and less volatile
  • less viscous, less flammable and more volatile
Q.8
Identify the main characteristics of an organic compound
  • High melting point
  • polar
  • conductor
  • can exist in solid, liquid, and gas
Q.9
Identify the main characteristics of an organic compoung
  • Low melting point
  • nonpolar
  • non-conductor
  • All of the above
Q.10
Which of the following elements must be present in any organic compound?
  • Carbon
  • Oxygen
  • Potassium
  • Hydrogen
Q.11
Which is an organic compound?
  • Carbon Dioxide
  • Carbon Monoxide
  • Carbonates
  • Ethane
Q.12
Which of the following has the highest boiling points
  • alkanes
  • alkenes
  • alkynes
  • alkanols
Q.13
Which of the following does not contain only carbon and hydrogen
  • alkanes
  • alkenes
  • alkynes
  • alkanols
Q.14
Which of the following is more volatile?
  • petrol
  • diesel
  • oil
  • my temper
Q.15
Which one of the following is saturated?
  • water
  • C4H8
  • C4H10
  • C5H8
Q.16
Which of the following could contain a triple bond?
  • C4H10
  • C4H8
  • C4H6
  • C4H12
Q.17
Which of the following has the highest viscosity
  • petrol
  • diesel
  • biodiesel
  • LPG
Q.18
Which of the following would have the highest melting point?
  • C3H8
  • C4H8
  • C5H12
  • C22H44
Q.19
Which of the following generally undergoes substitution reactions
  • alkanes
  • alkenes
  • Alkanes and alkenes
  • algebras
Q.20
The molecular formula for Heptane is
  • C4H10
  • C7H18
  • C5H12
  • C7H16
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