JEE Main 2017ChemistryHaloalkanes and HaloarenesMediumMCQ

JEE Main 2017 — Haloalkanes and Haloarenes Question with Solution

JEE Main 2017 (02 Apr)

Question

Which of the following, upon treatment with tert-BuONa  followed by addition of bromine water, fails to decolourize the colour of bromine?

Choose an option

Show full solutionCorrect option: D
Correct answer
D

Step-by-step explanation

In the options, they have acidic β−H so an elimination reaction takes place and alkene will be formed.

And the formed alkene decolourizes the bromine water {E⊕ addition reaction of an alkene by HOBr} while in 4 it does not have β−H so, there is no formation of alkene, hence does not decolourize Br2 water.

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About this question

This is a previous-year question from JEE Main 2017, covering the Haloalkanes and Haloarenes chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.