Shristy posted an Question
August 28, 2020 • 23:22 pm 30 points
  • IIT JAM
  • Chemistry (CY)

2. in valence-bond calculations, contributions of various resonance structures are used to calculate the total energy of a molecule. given below are four resona

2. In valence-bond calculations, contributions of various resonance structures are used to calculate the total energy of a molecule. Given below are four resonance structures of the cyanate ion. Which one contributes least to the total energy. (a) NEC-Oo (b) 2: N-CEO (c)N=C=Q (d) N-C-9

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    Priyanshu kumar best-answer

    Option C as the major resonance contributor has the lowest energy

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    ans given is d

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    yes sorry...first priority to number of covalent bond

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    Thanks for correcting🙏

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    4 has least covalent bond

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    In all other there is 4 covalent bond

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    Dinesh khalmaniya 1 Best Answer

    option D

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    less the covalent bonds, less stable is the resonating structure

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    in option D, least number of covalent bonds are present so it is less stable

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    these are the possible resonating structure of cynate ion

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    got it?

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    means jitna covalent bond hoga utni energy hogi ??

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    yes, we will give priority to covalent bonds then other factors

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    follow this order

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    ok sir got it

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