How does it account for benzene's extraordinary stability ? Give an orbiial picture of benzene ?

The ring is comprised of six sp2 hybridized carbon's each sigma bonded  to carbon’s and an H. (Fig-1) Each Carbon  also has a "p" AO with one electron :  the AO's project above and below the plane of the ring which is a nodal plane. Rather than form three localized alternating doubic bonds (cycIohexatriene). these "p" AO's overlap  laterally to form an extended π-system in which the electrons  are symmetrically delocalized over all six carbon's making the Carbon's equivalent . (Fig-2) Delocalization results in less electron repulsion, greater stabilizalion, and lower energy.

Related Questions: 
Is Benzene same as 1,3,5-Cyclohexatriene ?
Which halogen best delocalises electron density to benzene ring?
Nitrobenzene and not benzene, is used as a solvent for Friedel Craft alkylation of bromobenzene. Why ?
Why tetraalkylammonium ion ((CH3)4 N+) is neither an electrophile nor a nucleophile and H3O+ is not nucleophile but electrophile although it contains a lone pair of electrons.
Why does not carbon form C+4 or C-4 ions? Explain.
Which halogen best delocalises electron density to benzene ring ?
What is Lindlar’s catalyst and does Lindlar’s catalyst use ?
Fluorine is more electronegative than chlorine even then, p-flurobenzoic acid is weaker acid than p-chlorobenzoic acid explain ?

What is lucas reagent and where is lucas reagent uses ?

Anhydrous zinc chloride and concentrate HCl is known as Lucas reagent and it is use for distinguish between primary, secondary and tertiary alcohols:

Related Questions:

Both glucose and fructose are reducing sugars but sucrose is non-reducing in nature. Why?
Fructose contains a keto group, yet it reduces Fehling solution and Tollen's reagent. Why ?
What is Dunstan's test , How can it use for test Glycerol ?
What is luca's reagent and where is luca's reagent uses ?
What is Victory-Meyer's test and how can distinction between 1°, 2° and 3° alcohols by this ?
Benzaldehyde gives a positive test with Tollen's reagent but not with Benedict's and Fehling's solution. Comment why?
Aromatic amines are lesser basic than aliphatic amines.why ?
Which are the compounds gives positive Tollen's test?
What is Tollen's reagent?
What is Carbylamine test or Isocyanide test ?
What is Hinsberg's reagent and where Hinsberg's test use?
N-Ethyl-N-methyl propanamine does not show optical activity why?

What is Victory-Meyer's test and how can distinction between 1°, 2° and 3° alcohols by this ?

Victory- Meyer's test use for distinction of 1°, 2° and 3° alcohols which include a series of reagent as given below :

Benzaldehyde gives a positive test with Tollen's reagent but not with Benedict's and Fehling's solution. Comment why?

Benedict's solution (Cu⁺² citric acid + base) and Fehling's solution (Cu⁺²  tartaric acid + base) are weaker oxidising agents than Tollen's reagent [Ag(NH3)2]⁺, they oxidise alipharic aldehydes only, but are not capable of oxidising aromatic aldehydes.

Related Questions:

Both glucose and fructose are reducing sugars but sucrose is non-reducing in nature. Why?
Fructose contains a keto group, yet it reduces Fehling solution and Tollen's reagent. Why ?
What is Dunstan's test , How can it use for test Glycerol ?
What is luca's reagent and where is luca's reagent uses ?
What is Victory-Meyer's test and how can distinction between 1°, 2° and 3° alcohols by this ?
Benzaldehyde gives a positive test with Tollen's reagent but not with Benedict's and Fehling's solution. Comment why?
Aromatic amines are lesser basic than aliphatic amines.why ?
Which are the compounds gives positive Tollen's test?
What is Tollen's reagent?
What is Carbylamine test or Isocyanide test ?
What is Hinsberg's reagent and where Hinsberg's test use?
N-Ethyl-N-methyl propanamine does not show optical activity why?

Aromatic amines are lesser basic than aliphatic amines.why ?

Aliphatic amines are more basic in nature than aromatic amines because In aliphatic amines the electron density around N atom increases due to - I effect of alky  group and thus chance for proton attack also Increases.

On the other hand in aromatic amines the electron density around N atom decreases due to withdrawing nature of aromatic ring hence thus chance for proton attack on nitrogen atom decreases.

Related Questions:

Both glucose and fructose are reducing sugars but sucrose is non-reducing in nature. Why?
Fructose contains a keto group, yet it reduces Fehling solution and Tollen's reagent. Why ?
What is Dunstan's test , How can it use for test Glycerol ?
What is luca's reagent and where is luca's reagent uses ?
What is Victory-Meyer's test and how can distinction between 1°, 2° and 3° alcohols by this ?
Benzaldehyde gives a positive test with Tollen's reagent but not with Benedict's and Fehling's solution. Comment why?
Aromatic amines are lesser basic than aliphatic amines.why ?
Which are the compounds gives positive Tollen's test?
What is Tollen's reagent?
What is Carbylamine test or Isocyanide test ?
What is Hinsberg's reagent and where Hinsberg's test use?
N-Ethyl-N-methyl propanamine does not show optical activity why?