Home
Class 12
CHEMISTRY
Describe any two methods of preaparation...

Describe any two methods of preaparation of benzene with corresponding equtions. Benzene does not behave like an alkene, why? How do we mthyl benzene from benzens?

Text Solution

Verified by Experts

Preparation of Benzene:
1. Laboratory Method: Sodium benzoate on distillation with soda lime gives benzene.
`underset("Sod. benzoate")(C_(6)H_(5)COONa)+NaOH underset(Delta)overset(CaO)to underset("Benzene")(C_(6)H_(6))+Na_(2)CO_(3)`
A mixture of NaOH and CaO is called soda lime.
2. Polymerisation of acetylene: When acetylene gas is passed through red hot copper tube, it undergoes polymerisation forming benzene.
`underset("Acetylene")(3C_(2)H_(2)) underset(600^(@)C)overset("Red hot Cu")to underset("Benzene")C_(6)H_(6))`
Reason for not behaving as an alkene: Benzene has a number of resonance sturcutres.

Because of resonance benzene has more stability. The resonance energy of benzene is also very high. It also indicates more stability to the benzene molecule. Hence, stability of a molecule is due to saturation. Hence, from these two points it is evident that benzene exhibits more the properties of a saturated compound (alkane) rather than the properties of an unsaturated compound (alkene).
Methyl benzene from benzene: In presence of anhydrous `AlCl_(3)` benzene reacts with methyl chloride and formes methyl benzene (Toluence).
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ORGANIC CHEMISTRY

    VGS PUBLICATION-BRILLIANT|Exercise Short Answer Questions|17 Videos

  • MOST IMPORTANT QUESTIONS

    VGS PUBLICATION-BRILLIANT|Exercise ORGANIC CHEMISTRY (LONG ANSWER TYPE QUESTIONS)|11 Videos

  • STATES OF MATTER : GASES AND LIQUIDS

    VGS PUBLICATION-BRILLIANT|Exercise ADDITIONAL QUESTION & ANSWERS|10 Videos

Similar Questions

Explore conceptually related problems

Describe any two methods of preparation of benzene with corresponding equations. Benzene does not behave like an alkenes why ? How do we get methyl benzene from benzene ?

Write any two methods for preparation of benzene.

Describe any two methods of preparation of benzene. Why benzene does not behave like unsaturated compound ?

Write any two methods of preparation of benzene with corresponsing equations. How methyl benzene and acetophenone are prepared from benzene?

Write any one method for the preparation of chloro benzene .

Describe any two methods of preparation of acetylene. How does acetylene react with :

Describe any two methods of preparation of benzene. Why benzene does not behave like unsaturated compound? How does benzene react with i) Methyl chloride presence of anhydrous AlCl_(3) ii) A mixture of conc. HNO_(3) and conc. H_(2)SO_(4) below 60^(@)C .

Describe two methods of preparation of Benzene. Explain Halogenation and Alkylation reactions of Benzene.

How do you prepare acetophenone from benzene?

Explain the method of preparation of resorcinol from benzene.

Home
Profile