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20 July, 22:37

Question 2

Bromine will react very fast (almost instantly) with which compound?

O 1-Pentene

Cyclohexane

Heptane

Benzene

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Answers (1)
  1. 21 July, 00:40
    0
    1-Pentene

    Explanation:

    If we look at all the options listed, we will notice that the rate of reaction of bromine with each one differs significantly.

    For 1-pentene, addition of bromine across the double bond is a relatively fast process. It is usually used as a test for unsaturation. Bromine water is easily decolorized by alkenes.

    Cyclohexane, heptane are alkanes. They can only react with chlorine in the presence of sunlight. This is a substitution reaction. It does not occur easily. A certain quantum of light is required for the reaction to occur.

    For benzene, bromine can only react with it by electrophilic substitution in which the benzene ring is retained. A Lewis acid is often required for the reaction to occur and it doesn't occur easily.
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