Which of the following statements about chemical reactions are ...

[lilldybug07]

Which of the following statements about chemical reactions are true?
   
  1.
  Exothermic reactions occur at a rapid rate.
  2.
  The products of exothermic reactions are lower in energy than the reactants.
  3.
  Exothermic reactions give off heat.
  4.
  The products of endothermic reactions are lower in energy than the reactants.
   
  A)
  3
  B)
  1, 2, and 3
  C)
  1, 3, and 4
  D)
  2 and 3
  E)
  2

Question 2

Examine the following reaction energy diagram for the reaction
 
   
 
   
  Which of the following statements are true?
   
  1.
  The reaction is exothermic.
   
  2.
  The reaction occurs in one step.
   
  3.
  The first step is the rate-determining step.
   
  4.
  The reaction is endothermic.
   
  5.
  If the reaction is heated, the reaction rate will increase.
   
  A)
  1, 2, and 5
  B)
  1, 3, and 5
  C)
  2 and 4
  D)
  3, 4, and 5
  E)
  3 and 4

Question 3

What is the name of the alkene produced by treating 1-butyne with 1 mole of Br₂?
  A)
  (E)-1,2-dibromo-1-butene
  B)
  1,1-dibromo-1-butene
  C)
  (Z)-1,2-dibromo-1-butene
  D)
  1,2-dibromo-1-butene
  E)
  none of the above

[scottmt]

Answer to Question 1

d

Answer to Question 2

b

Answer to Question 3

c