Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 2,000 off
USE CODE: askschfd09


Difference between Tautomerism and Resonance

7 years ago


Answers : (2)



The molecular formula of gaseous hydrocarbons can be determined even without knowing their percentage composition. A known volume of hydrocarbon is taken in eudiometer tube and exploded with an excess of known volume of oxygen. The carbon and hydrogen of the hydrocarbon are oxidized to carbon dioxide and water respectively according to the following general reaction.

After explosion, the tube is allowed to cool to room temperature. The volume of the gaseous mixture is recorded. The volume corresponds to unreacted oxygen and carbon dioxide. The volume of carbon dioxide is determined by the decrease in volume of the gaseous mixture when caustic potash solution is introduced into the eudiometer tube. The caustic potash solution absorbs whole of carbon dioxide. The gas left behind is the unreacted oxygen. Volume of oxygen used is then calculated by subtracting the volume of unreacted oxygen from the total volume of the oxygen taken initially.

The molecular formula of the hydrocarbon can be evaluated by knowing

(i) the volume of gaseous hydrocarbon taken.

(ii) the volume of oxygen used.

(iii) the volume of carbon dioxide produced.



There are many differences between.

1)    Tautomers are definite compounds and can be separated and characterized by suitable methods, but resonating structure cannot be separated as they are imaginary structure of the same compound.

2)    Tautomerism involved the migration of a mobile hydrogen atom between two polyvalent atoms present in the molecule and thus tautomers differ a change in the position of atoms. On the other hand, resonating structures have identical atomic arrangement and involves only a change in the position of pi-electrons or unshared electrons.

3)    Tautomers are in dynamic equilibrium with each other and interconvertible but no such equilibrium exits in resonance and there is only form which is intermediate between the many contributing structures.

4)    Two tautomers have different functional groups, but the various resonating structures have same functional group.

5)    Tautomerism has no effect on bond length, while resonance is accompanied by an increase in bond length of a double bond and decrease of a single bond length.

6)    Tautomerism has no contribution in stabilizing the molecule and does not lower its energy, but resonance lowers the internal energy and thus gives rise to extra stability to a molecule.

7)    Tautomerism may occur in planar or nonplanar molecules, while resonatrice occurs only in planar molecules.



7 years ago

Thank you very much.

3 years ago

Post Your Answer

Other Related Questions on Organic Chemistry

I have op tandon for organic chemistry but my teacher says it`s not that good any idea what r must buy for organic? For problems I have himanshu pandey book
@ harsha yes ,o.p tandon is not at all required for organic chemistry , beacuse there are many concept which areabove the level of which jee advanced actually tests . so, for that reason...
Umakant biswal 3 months ago
frst of all gowith ncert , then solve all ques from himanshu pandey , if u are now at class 11 th then go with morrision and boyd , and if on class 12 th , then go with shortcuts for...
Umakant biswal 3 months ago
op tondon is not so good for jee main because its material has lot of time comsuming and it has a higher level book. you can do first ncrt problems then you take any other books for jee...
Sahabudin 18 days ago
What are analgesics and food preservatives.........?
Analgesics are drugs that reduce or totally abolish pain without causing disturbances of nervous system. There are two types of analgesics i. Narcotic analgesics E.g.: Morphine ii....
SAI SARDAR 5 months ago
Analgesis is defined as the drugs that reduce or abolish pain without causing impairment of conciousness,mental confusion,incoordinationor paralysis or some other disturbances of nervous...
somprasad 5 months ago
An analgesic or painkiller is any member of the group of drugs used to achieve analgesia , relief from pain. Analgesic drugs act in various ways on the peripheral and central nervous...
Umakant biswal 5 months ago
What are biodegradable and non-biodegradable detergents?
Biodegradable detergents: Cleansing agents or detergents which are decomposed by microbes are called biodegradable detergents. Their molecules have less branching. Non-biodegradable...
SAI SARDAR 5 months ago
1. Biodegradable Detergents are those detergents which can be degraded or decomposed by microorganisms present in water.such detergents have straight chain of hydrocarbons in the...
somprasad 5 months ago
1.Biodegradable dete rgents :Detergents having straight hydrocarbon chains are easily degraded(decomposed) by microorganisms .e.g.sodium lauryl sulphate. 2.Non-biodegradable detergents...
xavier 5 months ago
Detergents that can be degraded by bacteria are called biodegradable detergents . Such detergents have straight hydrocarbon chains. For example: sodium lauryl sulphate. Detergents that...
16 hours ago
the hybridization of phosphorus in PCl 5 (in solid state ) is 1)sp 3 2)sp 3 d 2 3)sp 3 d 4)both 1 and 2
@ krishna option no 3 turns out to be the correct option , here , the orbitals are filled by electrons of five cl atom . there are 5 p-cl sigma bond , three in one plane and make an angle...
Umakant biswal one month ago
i hope to no.3 because phosphours atom contain in last subshell is 5 electron and not contain a lone pair and here is 5 chlorine atom .then we add up eletron and we get a 10 and we devided...
sahabudin ali one month ago
I hope to option no 3.because it has 5 sigma bonds and no lone pairs of electrons,here,the orbital are filled by electrons of five cl atoms
Gavvala Ganesh one month ago
Sp3d. This is because hybridization depends on the lone pair of electrons on the central atom and the number of bonds it forms. P forms 5 bonds with no lone pair hence an sp3d hybridized....
4 days ago
When the speed of an electron increases, its specific charge
As per the theory of relativity, as the velocity of electron increases its mass also increases. As specific charge is inversely proportional to mass, as mass increases specific charge...
Amogh Dasture 4 months ago
@ mandeep we know that specific charges are e/m e/m is inversely proportional to the velocity of the electron ,, therefore as speed of the electron increases , the specific charges...
Umakant biswal 4 months ago
When the spped of an electron increases, its charge /mass ratio or specific charge decreases.................................................
Mudit 4 months ago
.Why li2CO3 decomposed at a lower temperature whereas Na2CO3 at higher temp?
The smaller the size of the ion, the higher the lattice energy and the greater the extent of the polarization. Li+ has a smaller size compared to Na+, hence polarizes the CO3- ion at a...
2017 years ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 15,000 off
USE CODE: askschfd09

Get extra R 2,000 off
USE CODE: askschfd09

More Questions On Organic Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details