SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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stays brown
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decolourises
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Either A or B
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None of the above
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Detailed explanation-1: -Addition of bromine to an alkene or alkynes results in the formation of vicinal dibromide which decolourises bromine water.
Detailed explanation-2: -Reason for Alkene Decolorize Bromine Water: When Br2/CCl4 is added to the alkene, the reddish-brown colour of bromine is discharged due to the formation of colourless vic dibromide. Therefore, this reaction is used for the detection of unsaturation in an organic molecule.
Detailed explanation-3: -Bromine water is an orange solution of bromine. It becomes colourless when it is shaken with an alkene. Alkenes can decolourise bromine water, but alkanes cannot.
Detailed explanation-4: -Ethene, butyne, and hexyne can decolourize bromine water. The bromine loses its original red-brown color to give a colorless liquid. The decoloration of bromine is often used as a test for C-C double and triple bond.