Topic 6: Organic Chemistry

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1. Why does But-1-ene not exhibit steroisomerism ?

  • Because it has different groups attached to the central C=C
  • It has the same group (two H's) attatched to one carbon in the C=C bond
  • Because it is a functional group isomer of But-2-ene
  • It exhibits E/Z but not Cis/Trans due to the varying groups attached to the C=Cs
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2. What is the difference between a ketone and an aldehyde?

  • A ketone has an C=O group in the middle of it's molcule, thus with an alkyl group on each side. In an aldehyde the C=O is found at the end of the molecule with an H and an alkyl group
  • An aldehyde has an C=O group in the middle of it's molcule, thus with an alkyl group on each side. In a ketone the C=O is found at the end of the molecule with an H and an alkyl group
  • A ketone can be formed from the oxidation by distillation of a primary alchol
  • An ketone will form a dark red precipitate of Copper(I) Oxide with Fehling's solution but an aldehyde will not

3. Which formulae type is this: "A zig-zag line where every bend and end is a carbon atom"

  • Skeletal
  • Emprical
  • Displayed
  • Structural

4. Propan-2-ol and Propan-1-ol are ____ isomers

  • Position
  • Geometric
  • Chain
  • Functional group

5. Why is 2-Bromopropane the major product of the reaction of propene and HBr?

  • Because the intermediary carbocation is more stable (the charge is spread over more atoms)
  • It is not, the products are equally likely as propene is symmetrical
  • There is less steric hinderance for the reaction compared to 1-Bromopropane
  • The H will attack where there are fewer H's already

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