| 21. | Multiple pairs represent multiple bonds, such as double bonds and triple bonds.
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| 22. | Double bonds involving carbon are stronger than single bonds and are also shorter.
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| 23. | It is a double bond isomer of nerolic acid.
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| 24. | An alpha-beta unsaturated double bond results between carbon 2 and three.
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| 25. | A covalent bond can also be a double bond or a triple bond.
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| 26. | It is possible to effect reaction at one of the double bonds selectively.
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| 27. | Each contains one double bond within its molecular structure.
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| 28. | He showed that the reaction involves two double bonds.
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| 29. | What about endless Michael reactions at the double bond?
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| 30. | The double bonds found in fats and oils play a role in autoxidation.
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