Ester -Multiple Choice Questions Quiz

Question 1: What is an ester?

(a) A type of hydrocarbon
(b) A type of alcohol
(c) A type of carboxylic acid
(d) A compound formed from the reaction between an alcohol and a carboxylic acid

Question 2: What is the functional group present in esters?

(a) Hydroxyl group (-OH)
(b) Carbonyl group (C=O)
(c) Carboxyl group (-COOH)
(d) Ester group (-COO-)

Question 3: Which compound is commonly responsible for the fruity smell in various fruits?

(a) Alcohol
(b) Aldehyde
(c) Ketone
(d) Ester

Question 4: How are esters named in the IUPAC nomenclature?

(a) By changing the suffix of the parent carboxylic acid to '-ol'
(b) By changing the suffix of the parent alcohol to '-ic acid'
(c) By combining the names of the alcohol and carboxylic acid components
(d) By using the common names of the alcohol and carboxylic acid components

Question 5: Which reaction is involved in the formation of an ester?

(a) Oxidation
(b) Reduction
(c) Substitution
(d) Esterification

Question 6: What is the common name of ethyl ethanoate?

(a) Acetic acid
(b) Ethyl acetate
(c) Ethanol
(d) Ethene

Question 7: What is the product of the reaction between ethyl alcohol and acetic acid?

(a) Ethanol
(b) Acetaldehyde
(c) Ethyl ethanoate
(d) Ethanoic acid

Question 8: Which of the following is NOT a common use of esters?

(a) Flavor and fragrance industry
(b) Solvents and paint thinners
(c) Plastics and synthetic fibers
(d) Metal corrosion protection

Question 9: Which functional group is present in both esters and carboxylic acids?

(a) Aldehyde group
(b) Ketone group
(c) Carbonyl group
(d) Hydroxyl group

Question 10: In the hydrolysis of an ester, what are the products formed?

(a) Alcohol and carboxylic acid
(b) Ketone and water
(c) Alkane and acid
(d) Aldehyde and alcohol

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Results:

Total score: /10

Answer key:

Question 1: d

Question 2: d

Question 3: d

Question 4: c

Question 5: d

Question 6: b

Question 7: c

Question 8: d

Question 9: c

Question 10: a