Midterm2%2D2005 - Please print CHM3125 MIDTERM 2(25...

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Please print CHM3125 Family name: MIDTERM 2 (25%) First name: 14-Mar-2005 Student #: Time allowed: 70 minutes Question 1 2 3 4 5 6 Total Value 18 8 8 8 8 8 50 Mark Notes IMPORTANT : You must answer question # 1 . You should answer 4 questions onl y from questions 2 to 6. Please indicate below which questions you do NOT want marked. If you make no selection, question number 6 (six) will not be marked. Please do NOT mark question number:
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CHM3125 Midterm 2 March 14 th 2005 page 2 of 9 1. (20 MARKS – stars show marks ) Short Answer: Fill in the spaces below. a) *In BULK polymerization the reaction is carried out in a mixture of the following components: b) *The main disadvantage of BULK polymerization is: c) **In the box below, show one synthesis of vinyl chloride (include any necessary conditions). d) *Commercial silicones, such as poly(dimethylsiloxane) are frequently employed in caulking and sealing products. Which one of the following values of T g seem more reasonable? Circle one. -127 °C -5 °C 22 °C 130 °C e) *The following mechanism shows the decomposition of 1,2-dichloroethane: ClCH 2 CH 2 Cl Cl + ClCH 2 CH 2 ClCH 2 CH 2 Cl HCl + ClCH 2 CHCl Cl + ClCH 2 CHCl Cl + CH 2 =CHCl ClCH 2 CHCl HCl + ClCH=CHCl Cl +
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