PORTAGE CHEM 219
MODULE 4 EXAM QUESTIONS AND
CORRECT ANSWERS
LATEST UPDATE 2026/2027 .
, 1. Organohalides ✔✔ ANSW Organic molecules contains Halogen atoms.
Ex. Algae, Mollusk, sponges, can be industrially used - solvents, insecticides, herbicides, cleaning fluids, fire retar-dants, refrigerants. Can also be used as inhaled
anesthetic.
More important in organic chemistry because of theur reactivity.
2. Two of the most important reaction types typical of organic Halides are.... ✔✔ ANSW -
Substitution Elimination
3. Substitution Reaction ✔✔ ANSW Replacing the halogen in a molecule with another atom or functional group.
4. Elimination ✔✔ ANSW Removes the halogen and hydrogen atoms from the original substrate molecule creating an
unsaturated compound.
5. Alkyl halide ✔✔ ANSW Aliphatic hydrocarbons that possess one or more halogen atom substituents.
6. Aryl Halides ✔✔ ANSW Aromatic hydrocarbons (benzene rings) with one or more halogen atoms attached to the ring.
7. Steric Bulk ✔✔ ANSW Structural substitution surrounding any carbon atom that bears a halogen. Methyl, primary,
secondary, tertiary.
8. Primary Alkyl Halide ✔✔ ANSW Only on e carbon is directly attached to the carbon bearing the halogen.
9. Secondary Alkyl Halid ✔✔ ANSW Two carbons directly attached to the carbon ring bearing the halogen
10. Tertiary Alkyl Halide ✔✔ ANSW Three carbons are directly attached to the carbon bearing the halogen
11. Methyl halide ✔✔ ANSW Only hydrogen atoms attached to the carbon bearing the halogen
12. X ✔✔ ANSW Symbol for generic halogen
13. Polarization of C-H bond ✔✔ ANSW Carbon will be electron-deficient and thus hold a slight positive charge and
slight negative charge on the halogen
14. Nucleophilic substitution reaction ✔✔ ANSW Halogen is replaced (substituted by) a new atom or function-al group.
Abbreviated Sn
MODULE 4 EXAM QUESTIONS AND
CORRECT ANSWERS
LATEST UPDATE 2026/2027 .
, 1. Organohalides ✔✔ ANSW Organic molecules contains Halogen atoms.
Ex. Algae, Mollusk, sponges, can be industrially used - solvents, insecticides, herbicides, cleaning fluids, fire retar-dants, refrigerants. Can also be used as inhaled
anesthetic.
More important in organic chemistry because of theur reactivity.
2. Two of the most important reaction types typical of organic Halides are.... ✔✔ ANSW -
Substitution Elimination
3. Substitution Reaction ✔✔ ANSW Replacing the halogen in a molecule with another atom or functional group.
4. Elimination ✔✔ ANSW Removes the halogen and hydrogen atoms from the original substrate molecule creating an
unsaturated compound.
5. Alkyl halide ✔✔ ANSW Aliphatic hydrocarbons that possess one or more halogen atom substituents.
6. Aryl Halides ✔✔ ANSW Aromatic hydrocarbons (benzene rings) with one or more halogen atoms attached to the ring.
7. Steric Bulk ✔✔ ANSW Structural substitution surrounding any carbon atom that bears a halogen. Methyl, primary,
secondary, tertiary.
8. Primary Alkyl Halide ✔✔ ANSW Only on e carbon is directly attached to the carbon bearing the halogen.
9. Secondary Alkyl Halid ✔✔ ANSW Two carbons directly attached to the carbon ring bearing the halogen
10. Tertiary Alkyl Halide ✔✔ ANSW Three carbons are directly attached to the carbon bearing the halogen
11. Methyl halide ✔✔ ANSW Only hydrogen atoms attached to the carbon bearing the halogen
12. X ✔✔ ANSW Symbol for generic halogen
13. Polarization of C-H bond ✔✔ ANSW Carbon will be electron-deficient and thus hold a slight positive charge and
slight negative charge on the halogen
14. Nucleophilic substitution reaction ✔✔ ANSW Halogen is replaced (substituted by) a new atom or function-al group.
Abbreviated Sn
