Chemistry SS3 Quiz on Carboxylic Acids

What is the main functional group in carboxylic acids?

• -OH group

• -CHO group

• -COOH group

• -NH2 group

How is the IUPAC name of each homologue of carboxylic acids obtained?

• By adding '-OH' group to the alkane name

• By changing the '-ane' ending of the alkane to '-oic' acid

• By removing the 'H' atom from the alkane name

• By changing the '-e' ending of the corresponding alkane to '-oic' acid

What is the general molecular formula of alkanoic acids?

• CnH2nOH

• CnH2nCOOH

• CnH2n+1COOH

• CnH2n+1OH

How is ethanoic acid prepared in the laboratory?

• By the combustion of ethanol

• By the reduction of ethanol

• By the oxidation of ethanol

• By the addition of water to ethanol

What is the physical state of ethanoic acid at a temperature below 17oC?

• Plasma

• Liquid

• Solid

• Gas

Which of the following is a chemical property of ethanoic acid?

• It reacts with water to form a gas

• It liberates CO2 from NaCl

• It reacts with chlorine to form a solid

• It turns red litmus blue

How are alkanoic acids classified based on the number of carboxylic groups per molecule?

• Primary acids, Secondary acids, Tertiary acids

• Basic acids, Neutral acids, Acidic acids

• Aliphatic acids, Aromatic acids, Cyclic acids

• Monocarboxylic acids, Dicarboxylic acids, Tricarboxylic acids

What is one of the uses of ethanoic acid?

• Used in electronic circuits

• Used in the production of vinegar

• Used in making plastic bottles

• Used as a fuel additive

Which of the following is a use of benzoic acid?

• Used in toothpaste

• Used in hair dye

• Used in insect repellants

• Used in sunscreen

How can you identify that a substance is a carboxylic acid?

• It has a sweet taste

• It turns red litmus blue

• It reacts with metals to form salts

• It liberates CO2 from carbonates