CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
Which property helps lower-mass alcohols dissolve in water?
A. Metallic bonding
B. Nuclear attraction
C. Absence of polarity
D. Hydrogen bonding through the hydroxyl group
Correct Answer: D
The polar O−H group can form hydrogen bonds with water.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
Which alcohol is a three-carbon triol commonly called glycerol?
A. Methanol
B. Phenol
C. Butanol
D. Glycerol
Correct Answer: D
Glycerol has three hydroxyl groups on a three-carbon chain.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
What is formed when a primary alcohol is oxidized mildly?
A. A metal
B. An aldehyde
C. An amine only
D. An alkane only
Correct Answer: B
Primary alcohols can first oxidize to aldehydes and then further to carboxylic acids.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
Which process can produce ethanol from sugars using yeast?
A. Electroplating
B. Nuclear fission
C. Sublimation
D. Fermentation
Correct Answer: D
Yeast ferments sugars anaerobically to produce ethanol and carbon dioxide.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
What is produced when ethanol undergoes complete combustion in oxygen?
A. Sodium and chlorine
B. Methane and hydrogen only
C. Carbon dioxide and water
D. Nitrogen and sulfur
Correct Answer: C
Complete combustion of an alcohol produces CO2 and H2O.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
Why is methanol particularly dangerous if ingested?
A. It contains no carbon
B. It can be metabolized to toxic compounds that may cause blindness or death
C. It is simply table sugar
D. It is harmless in all doses
Correct Answer: B
Methanol metabolism produces formaldehyde and formic acid, which can cause severe toxicity.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
Which alcohol is commonly present in alcoholic beverages?
A. Ethanol
B. Ethylene glycol
C. Glycerol only
D. Methanol
Correct Answer: A
Ethanol is the psychoactive alcohol found in alcoholic beverages.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
What is the molecular formula of ethanol?
A. C2H4
B. C2H5OH
C. CH3OH
D. CH3COOH
Correct Answer: B
Ethanol contains two carbon atoms and one hydroxyl group.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
What is the simplest alcohol?
A. Propanol
B. Methanol
C. Ethanoic acid
D. Ethanol
Correct Answer: B
Methanol, CH3OH, is the simplest member of the alcohol homologous series.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Alcohols
Which functional group characterizes alcohols?
A. Halide ion only
B. Amino group only
C. Carboxyl group only
D. Hydroxyl group (−OH)
Correct Answer: D
Alcohols contain one or more hydroxyl groups bonded to saturated carbon atoms.