PORTAGE CHEM 219
MODULE 5 EXAM QUESTIONS AND
CORRECT ANSWERS
LATEST UPDATE 2026/2027 .
, 1. Alcohol ✔✔ ANSW Generic formula R-OH, defined by the presence of a Hydroxyl group (-OH). Organic derivatives of water, as one of the hydrogen atoms
from the water molecule is replaced by an alkyl group.
2. Phenols ✔✔ ANSW Hydroxyl group directly attached to a benzene ring
3. Methyl Alcohol ✔✔ ANSW Only H atoms attached to the carbon bearing the-OH group
4. Primary Alcohol ✔✔ ANSW one alkyl group attached to the carbon atom bonded to the -OH group
5. Secondary Alcohol ✔✔ ANSW Two alkyl groups attached to the carbon atom bonded to the -OH group
6. Tertiary Alcohol ✔✔ ANSW Three alkyl groups attached to the carbon atom bonded to the -OH group
7. Boiling Point of Alcohols ✔✔ ANSW High due to Hydrogen bonding between the positively charged H and negatively charged O
8. Water solubility of alcohols ✔✔ ANSW As the carbon chain length increases alcohol becomes correspondingly less soluble in water.
9. Alcohols Acidity/Basicity ✔✔ ANSW Can act as a weak base (accepting H+ using a lone pair on the O atom) or weak acid (donating the O-H proton
as H+)
10. Amphoteric ✔✔ ANSW a substance that can act as both an acid and a base
11. Alkoxide Ion ✔✔ ANSW conjugate base of an alcohol, very strong base
12. Alkyloxonium Ion ✔✔ ANSW The conjugate acid of the alcohol is often called a protonated alcohol,
13. Dehydration ✔✔ ANSW Loss of water. An alcohol molecule will lose H2O to form an ALKENE. Type of elimination reaction — lose the -OH from one
C and H atom from the adjacent C.
First step — alcohol acts as a base. Tertiary alcohols - E1
Primary alcohols - E2
14. All dehydration begins with... ✔✔ ANSW Protonation of the alcohol group.
15. Order of ease of dehydration of alcohol substrates... ✔✔ ANSW 3>2>1
Tertiary require the least harsh conditions (typically 25% aqueous acid and 60-80 degrees C) whereas primary require fully concentrated acid and temperatures approaching 200
MODULE 5 EXAM QUESTIONS AND
CORRECT ANSWERS
LATEST UPDATE 2026/2027 .
, 1. Alcohol ✔✔ ANSW Generic formula R-OH, defined by the presence of a Hydroxyl group (-OH). Organic derivatives of water, as one of the hydrogen atoms
from the water molecule is replaced by an alkyl group.
2. Phenols ✔✔ ANSW Hydroxyl group directly attached to a benzene ring
3. Methyl Alcohol ✔✔ ANSW Only H atoms attached to the carbon bearing the-OH group
4. Primary Alcohol ✔✔ ANSW one alkyl group attached to the carbon atom bonded to the -OH group
5. Secondary Alcohol ✔✔ ANSW Two alkyl groups attached to the carbon atom bonded to the -OH group
6. Tertiary Alcohol ✔✔ ANSW Three alkyl groups attached to the carbon atom bonded to the -OH group
7. Boiling Point of Alcohols ✔✔ ANSW High due to Hydrogen bonding between the positively charged H and negatively charged O
8. Water solubility of alcohols ✔✔ ANSW As the carbon chain length increases alcohol becomes correspondingly less soluble in water.
9. Alcohols Acidity/Basicity ✔✔ ANSW Can act as a weak base (accepting H+ using a lone pair on the O atom) or weak acid (donating the O-H proton
as H+)
10. Amphoteric ✔✔ ANSW a substance that can act as both an acid and a base
11. Alkoxide Ion ✔✔ ANSW conjugate base of an alcohol, very strong base
12. Alkyloxonium Ion ✔✔ ANSW The conjugate acid of the alcohol is often called a protonated alcohol,
13. Dehydration ✔✔ ANSW Loss of water. An alcohol molecule will lose H2O to form an ALKENE. Type of elimination reaction — lose the -OH from one
C and H atom from the adjacent C.
First step — alcohol acts as a base. Tertiary alcohols - E1
Primary alcohols - E2
14. All dehydration begins with... ✔✔ ANSW Protonation of the alcohol group.
15. Order of ease of dehydration of alcohol substrates... ✔✔ ANSW 3>2>1
Tertiary require the least harsh conditions (typically 25% aqueous acid and 60-80 degrees C) whereas primary require fully concentrated acid and temperatures approaching 200
