Alcohols & Carboxylic Acids

Which statement is true about ethanol?

• It is an unsaturated compound

• It is formed by the oxidation of ethanoic acid

• It reacts with ethyl ethanoate to form anacid.

• It is formed by the catalytic addition of steam to ethene

Ethanol is used in some after-shave lotions and deodorants.Which pair of properties makes it suitable for these uses?

• It is flammable and vaporises easily

• It is a good solvent and vaporises easily.

• It is flammable and mixes easily with water

• It is colourless and has a low freezing point.

Which of the following describes fermentation?

• It involves conversion of hydrocarbons to ethanol, accompanied by the evolution of carbon monoxide

• It involves conversion of hydrocarbons to ethanol, accompanied by the evolution of carbon dioxide

• It involves conversion of carbohydrates to ethanol, accompanied by the evolution of carbon monoxide

• It involves conversion of carbohydrates to ethanol, accompanied by the evolution of carbon dioxide.

What will propanol, C₃H₇OH, form on complete oxidation?

• CH₃CO₂H

• C₂H₅CO₂H

• C₃H₇CO₂H

• C₄H₉CO₂H

What is the characteristic functional group of carboxylic acids?

• Carbonyl

• Hydroxyl

• Carbon

• Carboxyl

name this:
HCOOH

• methanol
• methanoic acid
• methyl methanoate

name this diagram:

• ethanol

• ethanoic acid

• methyl methanoate

• Formic acid

Name this molecule.

• ethanol

• ethanoic acid

• propanol

• propanoic acid

Answer explanation

There are 3 carbons, so the prefix is pro!

Methanoic acid reacts with magnesium carbonate to give:

• magnesium methanate, carbon dioxide and water

• magnesium methanoate, carbon dioxide and water

• magnesium, carbon dioxide and water

• carbon dioxide and water

General formula of carboxylic acids is:

• C_nH_2n+1OH

• C_nH_2nCOOH

• C_nH_2n+1COOH

• C_nH_2n+2COOH