Benzene

Multiple Choice

Why is benzene considered an important molecule in organic chemistry?

• Because it is a common solvent

• Because it is a building block for many compounds

• Because it is highly reactive

• Because it is used in food production

Fill in the Blanks

Give the empirical formula for Benzene.

Open Ended

Compare the reactions of Benzene with those of Alkenes. What are the main differences in their chemical behavior?

Open Ended

Explain why Benzene is classified as an aromatic hydrocarbon.

Multiple Choice

Which scientist proposed the ring structure for Benzene in 1865?

• Friedrich August Kekulé

• Marie Curie

• Dmitri Mendeleev

• Linus Pauling

Fill in the Blanks

Fill in the blank: The structure of Benzene consists of six

atoms arranged in a ring, each bonded to one hydrogen atom.

Multiple Choice

Which scientist suggested the alternate structure for benzene with alternating double bonds in the ring?

• Kekulé

• Pauling

• Lewis

• Curie

Fill in the Blanks

The systematic name of benzene is Cyclohexan-

-triene.

Open Ended

Explain the concept of resonance in benzene and how it relates to the stability of the molecule.

Multiple Choice

Which of the following statements about benzene is correct?

• The double bonds in benzene are fixed between specific carbon atoms.

• Benzene has two resonating structures due to oscillating double bonds.

• Benzene contains only single bonds between carbon atoms.

• Benzene is not a planar molecule.

Multiple Choice

Which of the following is NOT a benzene type compound?

• Phenol

• Toluene

• Methane

• Xylene

Open Ended

List any three physical properties of benzene and explain why it is considered hazardous.

Open Ended

Explain why benzene has a high percentage of carbon in its molecule and how this affects its combustion reaction.

Multiple Choice

Which of the following is a product of the complete combustion of benzene?

• CO2 and H2O

• CO and H2O

• C and H2O

• CO2 and H2

Multiple Select

Which of the following statements are true about the addition reaction of benzene with hydrogen?

• It requires a nickel catalyst.

• It occurs at 150°C.

• The product is cyclohexane.

• The product is benzene hexachloride.

Fill in the Blanks

Fill in the blank: The product formed when benzene reacts with chlorine in sunlight is hexanchlorocyclohexane, with the formula

Open Ended

Compare the substitution reactions of benzene with chlorine and bromine. What are the products formed in each case and what catalysts are used?

Multiple Select

Which of the following are required for the nitration of benzene to form nitrobenzene?

• Concentrated H2SO4

• Temperature around 50°C

• HNO3

• FeBr3

Multiple Choice

Which compound is formed when benzene reacts with concentrated sulphuric acid?

• Benzenesulphonic acid

• Phenol

• Toluene

• Nitrobenzene

Fill in the Blanks

Methylbenzene is also known as

Open Ended

Explain the role of AlCl3 in the alkylation reaction of benzene shown above.

Multiple Select

Which of the following are uses of benzene?

• Solvent for fats and resins

• Production of TNT

• Raw material for plastics

• Food preservative

Open Ended

What aspect is difficult for you so far in what we have learnt in Organic chemistry? What you think I should go over again?

Open Ended

What questions do you still have about benzene or its structure?

Fill in the Blanks

Give the formula for Benzene.