Which of the following decolorizes Br_2 water | vedclass

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(C) $Br_2$ water is used as a test for unsaturation (presence of double or triple bonds).Unsaturated hydrocarbons like alkenes and alkynes undergo ele

Vedclass · Accepted Answer

$HC \equiv CH$

Vedclass · Answer

(C) $Br_2$ water is used as a test for unsaturation (presence of double or triple bonds).Unsaturated hydrocarbons like alkenes and alkynes undergo electrophilic addition reactions with $Br_2$,which leads to the disappearance of the reddish-brown color of $Br_2$ water.Among the given options:$A$. Benzene is aromatic and does not undergo addition reactions with $Br_2$ water under normal conditions.$B$. $CH_3-CH_2-OH$ (ethanol) is a saturated alcohol and does not react with $Br_2$ water.$C$. $HC \equiv CH$ (acetylene/ethyne) is an alkyne (unsaturated) and reacts with $Br_2$ water to form $CHBr_2-CHBr_2$,thus decolorizing it.$D$. $CH_3-CH_2-Cl$ (chloroethane) is a saturated alkyl halide and does not react with $Br_2$ water.Therefore,$HC \equiv CH$ is the correct answer.

Which of the following decolorizes $Br_2$ water solution?

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