Quiz on Phenols

What is the general class of compounds that gives its name to Phenol?

• Phenols

• Ethers

• Alcohols

• Ketones

How are methylphenols usually named?

• Alcohols

• Phenols

• Cresols

• Hydroxy compounds

In naming more highly substituted phenols, where does the numbering of the ring begin?

• At the carbon with the hydroxyl group

• At the carbon with the lowest substituent

• At the carbon with the carboxyl group

• At the carbon with the highest substituent

What is the main reason for the higher acidity of phenol compared to alcohols?

• Presence of a positive charge on OH

• Stabilization of phenate anion

• Delocalization of negative charge on alkoxide ion

• Electron-withdrawing effect of the sp2 carbon

Which group at o- or p- position significantly increases the acidity of phenols?

• OH

• CH3

• NO2

• COOH

What is the main product of the Reimer-Tiemann reaction?

• Phenol

• Salicylaldehyde

• Anisole

• Phenetole

How is p-Nitrophenol better prepared?

• Sulphonation

• Nitrosation followed by oxidation

• Friedel-Crafts alkylation

• Nitration with dilute nitric acid

What is the main product of the Williamson synthesis of aryl ethers?

• Methyl phenyl ether

• Anisole

• Ethyl phenyl ether

• Diphenyl ether

Which reaction is suitable only for phenols and other heterocyclic rings?

• Friedel-Crafts alkylation

• Reimer-Tiemann reaction

• Williamson synthesis

• Hydroxymethylation

How are aryl ethers cleaved by hydrogen halides?

• Ar-O-R + HX -> Ar-OH + R-X

• Ar-O-R + HX -> ArOH + RX

• ArOH + HX -> Ar-OH + R-X

• ArOH + HX -> ArOH + RX