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CHE1502 EXAM PACK 2022
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- CHE1502 EXAM PACK 2022
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- University Of South Africa
CHE1502 EXAM PACK 2022
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CHE1502EXAM PACK
2022
, CHE1502/101/3/2020
ASSIGNMENTS FOR JANUARY-JUNE SEMESTER
SEMESTER 1
ASSIGNMENT 01
UNIQUE NUMBER: 877786
DUE DATE: 27 February 2020
TOPICS: Concepts in Organic Chemistry, Alkanes and Cycloalkanes,
Alkenes and Alkynes
ANSWER ALL QUESTIONS
The multiple choice questions have FOUR possible answers. In each case, provide only
ONE answer to each question.
The answers to each multiple choice question must be entered on an optical mark reading
sheet which is provided as part of the study material.
1. Which of the following electronic structures is INCORRECT?
(1)
F
B
F F
23
, (2)
H O H
H
(3)
H
H N H
H
(4)
O
H 3C S CH3
2. The H-C-H bond angle in methane is:
(1) 120o
(2) 109.5o
(3) 90o
(4) 180o
3. Which of the following represent the CORRECT hybridization state of the CARBON
atoms in the structures shown below?
(1)
(2)
(3)
(4)
24
, CHE1502/101/3/2020
4. Which of the following molecules has a dipole moment of zero?
(1) NH3
(2) CH4
(3) CHBr3
(4) CH2CH3OH
5. The formal charges of the atoms in the following structure are?
H
N
H B B H
H N N H
B
H
(1) zero on all atoms
(2) -1 on each N and +1 on each B
(3) +1 on each N and -1 on each B
(4) -2 on each N and +2 on each B
6. Which of the following reactions is a correct example of homolysis?
(1)
CH3CH2Br CH3CH2 + Br
(2)
CH3 CH3 CH3 + CH3
(3)
CH3Br CH3 + Br
(4) CH3OH → CH3 + OH
25
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