Which of the following is the simplest form of an aldehyde?
a) Ethanal
b) Propanal
c) Butanal
d) Methanal
Answer: d) Methanal

The reaction between an alkyl halide and a nucleophile is an example of:
a) Substitution
b) Addition
c) Elimination
d) Hydration
Answer: a) Substitution

Which of the following is a property of alkenes?
a) They are saturated hydrocarbons
b) They contain a double bond
c) They are less reactive than alkanes
d) They contain a benzene ring
Answer: b) They contain a double bond

Which reagent is used to test for the presence of aldehydes?
a) Bromine water
b) Fehling’s solution
c) Sodium hydroxide
d) Potassium permanganate
Answer: b) Fehling’s solution

Which of the following compounds is formed by the oxidation of a secondary alcohol?
a) An aldehyde
b) A carboxylic acid
c) A ketone
d) An ester
Answer: c) A ketone

Which of the following is an example of a tertiary alcohol?
a) Methanol
b) Ethanol
c) 2-Propanol
d) 2-Methyl-2-propanol
Answer: d) 2-Methyl-2-propanol

What is the general formula for alkynes?
a) CₙH₂ₙ₊₂
b) CₙH₂ₙ
c) CₙH₂ₙ₋₂
d) CₙH₂ₙ₊₄
Answer: c) CₙH₂ₙ₋₂

Which of the following is used to convert an alkene to a dibromoalkane?
a) Bromine water
b) Sodium hydroxide
c) Hydrochloric acid
d) Sulfuric acid
Answer: a) Bromine water

The presence of which group in a compound indicates that it is a ketone?
a) -OH
b) -CHO
c) -COOH
d) -CO-
Answer: d) -CO-

The reaction of an ester with a base to form a carboxylate salt and alcohol is known as:
a) Hydrolysis
b) Saponification
c) Esterification
d) Oxidation
Answer: b) Saponification