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Phenyl Group and Benzene Ring Directing Groups Quiz

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Phenyl Group and Benzene Ring Directing Groups Quiz

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Questions and Answers

What is the reason behind the difficulty of benzene to undergo addition reactions?

Presence of chlorine in the benzene molecule

High surface tension of benzene

Low boiling point of benzene

Due to the delocalization of electrons in the benzene ring (correct)

What method involves passing hexane over a hot catalyst to obtain benzene?

Chlorination reaction

Hydrogenation process

Distillation method

Catalytic reforming (correct)

When benzene reacts with chlorine gas or bromine fumes in sunlight, what compound is formed?

Hexahalocyclohexane (correct)

Dichloro Diphenyl Trichloro

Gamixane

Cyclohexane

Why are polynitro organic substances considered very explosive?

Contain weaker N-O bonds compared to C-O and N-N bonds (C) Signup and view all the answers

How does adding detergent to water enhance its ability to clean textile?

Decreases water's surface tension (D) Signup and view all the answers

Why is it challenging for benzene to undergo reactions by addition under normal conditions?

Due to the delocalization of electrons in the benzene ring (A) Signup and view all the answers

What is the correct structure of a phenyl group?

C6H5- (C) Signup and view all the answers

Which functional group is a meta directing group on the benzene ring?

Aldehydic (-CHO) (C) Signup and view all the answers

Who is credited with discovering the hexagonal cyclic shape of the benzene molecule?

Kekule (B) Signup and view all the answers

How is benzene obtained from phenol?

By reducing phenol with hot zinc powder (C) Signup and view all the answers

Which organic compound is the most important product obtained from the fractional distillation of coal tar?

Gasoline (D) Signup and view all the answers

What is the chemical formula for a vinyl group?

(CH2=CH2)- (C) Signup and view all the answers

Study Notes

Benzene Properties and Reactions

Benzene has difficulty undergoing addition reactions due to its stable delocalized electron ring system.

Production of Benzene

Benzene can be obtained by passing hexane over a hot catalyst.

Electrophilic Substitution Reactions

Benzene reacts with chlorine gas or bromine fumes in sunlight to form halogenated derivatives.

Nitro Compounds

Polynitro organic substances are considered very explosive due to their high reactivity.

Surface Chemistry

Adding detergent to water enhances its ability to clean textile by reducing the surface tension of water.

Benzene Structure and Reactivity

Benzene's delocalized electron ring system makes it challenging for the molecule to undergo reactions by addition under normal conditions.
The correct structure of a phenyl group is a hexagonal cyclic shape.

Functional Groups

Nitro (-NO2) is a meta directing group on the benzene ring.

History

Michael Faraday is credited with discovering the hexagonal cyclic shape of the benzene molecule.

Obtaining Benzene

Benzene can be obtained from phenol.

Coal Tar Products

Benzene is the most important product obtained from the fractional distillation of coal tar.

Vinyl Group

The chemical formula for a vinyl group is CH=CH2.

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Description

Test your knowledge on the structure of a phenyl group and meta directing groups on the benzene ring. Identify the correct structures and understand their roles in organic chemistry.