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Alkenes Answer Key

What is the general formula of alkenes?
  1. [math]C_nH_(2n)[/math]
  2. [math]C_nH_(2n+2)[/math]
  3. [math]C_nH_(2n+1)[/math]
  4. [math]C_nH_(2n +1[/math]
What would be the IUPAC name of the following compound?

[math]CH_3-CH = CH - CH_3[/math]
  1. But-2-ene
  2. But-1-ene
  3. Pent-1-ene
  4. Pent-2-ene
What is the temperature range in which an alcohol must be heated with concentrated sulfuric acid to form the corresponding alkene?
  1. 443 K to 453 K
  2. 425 K to 439 K
  3. 415 K to 430 K
  4. 420 K to 470 K
What is the product of the following chemical reaction?

[math]CH_2=CH_2 + HBr rarr[/math]
  1. [math]CH_3-CH_2-Br[/math]
  2. [math]CH_3-CH=CH-Br[/math]
  3. [math]CH_2=CH-Br[/math]
  4. [math]CH_3-CH=CH-CH_2-Br[/math]
What temperature and pressure conditions are required to carry out the polymerization of ethylene?
  1. Temperature (463 K to 483 K) and Pressure (1500 atm.)
  2. Temperature (450 K to 480 K) and Pressure (1200 atm.)
  3. Temperature (400 K to 430 K) and Pressure (1300 atm.)
  4. Temperature (420 K to 440 K) and Pressure (1600 atm.)
To predict the major product in the addition reaction of a hydrogen halide with an unsymmetrical alkene, which of the following conditions is used?
  1. Markownikoff's rule
  2. Kharasch effect
  3. Baeyer's test
  4. Peroxide effect
Which of the following isomers is associated with difference in carbon chain length?
  1. Structural isomerism
  2. Cis isomerism
  3. Trans isomerism
  4. Geometrical isomerism
Which of the following can be added to help oxidize an alkene to glycols?
  1. [math] KMnO_4 [/math]
  2. [math] H_2 SO_4 [/math]
  3. HCl
  4. Raney Ni
Alkynes on catalytic hydrogenation first give alkenes, which on further reaction give alkanes.
Name ONE of the metal catalysts that can be used in the catalytic hydrogenation of an alkene.
  • Award credit for one of the following answers:
    • Pt, Pd, and Ni
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