The most stable canonical structure among all of above is:a)Only Ib)Only IIc)Only IIId)All are equally stableCorrect answer is option 'C'. Can you explain this answer?

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There is a rule, which structure has maximum double bond is more stable,

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In 3rd canonical structure follow's the octet rule ,and complete octet always increases stability, whre in 1&2 one carbon atom is in sextet state , and also the no of covelent bonds are greter in 3,for both the reasons 3is more stable than 1& 2.

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Completion of octet is stabilized that compound.

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Higher the no of covalent bond higher will be the stability.so ,option C is correct

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3 is more stable because +Ione is more stable to electronegative atom

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No. of covalent bond is Max. in III

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Correct answer is c

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The structure which has maximum double bond is more stable.

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3

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In third structure,no.of covalent bonds  are higher so it is more stable.

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Option c is the right answer. because no.of covalent bond maximum in III and it fulfill the octet rule.but structure I and II are sextet. so they are less stable than octet.

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First of all the ring consists of oxygen which is  electronegative and also the hyperconjugation exists..

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More number of double bonds
Thus,C is the most stable structure

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Third structure have max no. of covalent bonds

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C will be correct answer because here all the atoms are octat complete in the compound

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This has extended conjugation

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Inspite of having positive charge on oxygen atom structure 3 is more favorable because of highest no of pi-bond among all of these structures.

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It is because each atom in the ring completes octet in case of structure III...

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Most number of double bonds+highly stable oxonium ion

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Option c is correct as it have more no. of bonds and octet of all atoms of the hereronuclear ring is complete gives more stability...

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Structure 3 has complete octet of every atom

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C is the answer cause that form is most stable which has maximum no. of covalent bonds.

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Option C is correct answer because positive charge is more stable at electronegative atom

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C

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Here the carbon filled up its octet ...

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Above oxygen atom + charge takes places so that it more stable because that structure makes more resonating strcture

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Because in the structure 3 , it shows resonance effect. we can draw more resonance structure so +ve charge is delocalized hence it becomes more stable

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D

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C has more number of covalent bonds.hence it has more contribution to resonance hybrid

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First canonical structure is resonating structure ,so the structure having most number of double bond is more stable.

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Option C is correct answer. Since in both the cannonical forms i & ii the octet rule is violated. Only in structure iii octet rule is followed. This is the main reason for its stability.

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Para>meta>ortho

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No. 3

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Higher covalent bond higher will be it's stability

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Because of oxygen have a positive charge

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Completion of octet rule is the first priority of all

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B is correct

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Correct answer is option C'

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Extra cogucation

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Maximum double  bond and charge on hetereroatom

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III has more no.of covalent bonds

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Presence of more double bonds stabilises the structure

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Actually the stability arises due to the complete octant of all atom participating in resonance as well the plus charge of carban atom stabilised by backbonding

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3rd one

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What are those covalent bonds,could you explain

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Maximum double bond are most stable.

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