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The Question

Question: Which of the following compounds will show highest dipole moment and why?

I figured out that, (4)th compound is very symmetric - so net dipole moment on the compound must be null.

How should I go about finding the compound with the highest dipole moment? Any help or tips are welcome!

[Question borrowed from the JEE - Main]

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    $\begingroup$ “The image and the title are very self-explanatory.” – Please don’t write such things. Write your question in the Body box. Your question should be clear even without the title. Especially, do not write your whole question in the title and then put something like “title says it all” in the body. Write your question out in full; do not post a picture of the question. $\endgroup$
    – user7951
    Dec 26, 2019 at 14:22
  • $\begingroup$ It is all about aromaticity. $\endgroup$
    – Ivan Neretin
    Dec 26, 2019 at 14:41
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    $\begingroup$ Great! You may write an answer yourself, this is allowed and even encouraged. $\endgroup$
    – Ivan Neretin
    Dec 26, 2019 at 15:20
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    $\begingroup$ For further studies you may search for quasi-aromaticity. $\endgroup$
    – Zenix
    Dec 26, 2019 at 17:36
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    $\begingroup$ Im not sure why this question is closed. What effort could I have possibly shown? I hit a dead end. If Ivan had not given me an idea about aromaticity, I would've remain stuck. This question is from an engineering college entrance examination, intended for 17/18 year olds. It would be helpful if someone could explain how I could've possibly shown more effort. Thank you. $\endgroup$
    – McSuperbX1
    Dec 28, 2019 at 3:45

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