Organic reactions

When ethanol is reacted with dilute acid at a low temperature (140°C), which organic substance is formed?

• Diethyl ether (ethoxyethane)

• ethene

• ethyl ethanoate

• ethanoic acid

The reaction of ethanol and dilute acid to form diethyl ether is an example of which type of reaction?

• condensation

• elimination

• dehydration

• nucleophilic addition

Which if these oxidising agents is not classed as a "mild" oxidising agent?

• Tollens' reagent

• Benedict's reagent

• Copper (II) oxide

• potassium permanganate

The reaction of HCN with butanal to form a cyanohydrin is an example of a:

• electrophilic substitution

• electrophilic addition

• nucleophilic substitution

• nucleophilic addition

Which of these acids will be strongest?

• ethanoic acid

• propanoic acid

• chloroethanoic acid

• dichloroethanoic acid

Methanol, ethanol and phenol were added to water. Which is most acidic?

• methanol

• ethanol

• phenol

• none of them are acidic - they are organic liquids.

When methanoic acid is added to ethanol in the presence of concentrated acid, which organic substance is made?

• methyl ethanoate

• ethyl methanoate

• methoxyethane

• ethoxyethane

When sodium metal is added to methanol, which of these substance will not form?

• sodium methoxide

• methoxymethane

• hydrogen gas

• water

Which of these reactants could not help distinguish between propanal and propanone?

• Lithium aluminium hydride

• Benedict's reagent

• potassium dichromate

• potassium permanganate

Which of these substances would have the highest boiling point?

• butane (Mr = 58)

• propan-1-ol (Mr = 60)

• ethanoic acid (Mr = 60)

• methyl methanoate (Mr = 60)