Understanding Resonance in Chemistry

Who discovered benzene and in what year?

• Kathleen Lonsdale in 1929

• Michael Faraday in 1825

• Albert Einstein in 1905

• Friedrich August Kekulé in 1862

What was the main issue with Kekulé's initial structure of benzene?

• It had too many carbon atoms.

• It suggested rapidly interchanging bonds.

• It was not a hexagonal shape.

• It had incorrect hydrogen placement.

What did X-ray diffraction reveal about benzene's structure?

• Benzene has alternating single and double bonds.

• Benzene is a pentagon.

• Benzene has varying bond lengths.

• Benzene is a flat regular hexagon with identical bond lengths.

How is resonance represented in chemistry?

• By showing only single bonds.

• By drawing a single structure.

• By using a single-headed arrow.

• By using a double-headed arrow between multiple Lewis structures.

What is the bond order of the N-O bonds in nitrate?

• 1.5

• 2

• 1.33

• 1

Which rule is most important when evaluating resonance structures?

• The structure with the least electronegative atoms.

• The structure with the most double bonds.

• The structure with the fewest formal charges.

• The structure with the most atoms.

What effect does resonance have on the stability of a molecule?

• It increases stability.

• It has no effect on stability.

• It decreases stability.

• It makes the molecule more reactive.

Why is acetic acid more acidic than ethanol?

• Because of its resonance-stabilized conjugate base.

• Because it has a higher molecular weight.

• Because it has more hydrogen atoms.

• Because it is a stronger base.

What is the main component of vinegar?

• Water

• Methanol

• Acetic acid

• Ethanol

Which of the following is true about benzene's reaction with strong acids?

• Benzene does not react with strong acids.

• Benzene dissolves in strong acids.

• Benzene forms a precipitate with strong acids.

• Benzene reacts vigorously with strong acids.