A. alkene
B. alkanal
C. alkyne
D. alkanone
Correct Answer:
Option A – alkene
Explanation
Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. The bromine loses its original red-brown colour to give a colourless liquid.
Alkynes also react with bromine, decolorising it though not as immediate as alkenes.
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![An organic compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. What is the empirical formula of the compound? [O = 16.0, C = 12.0, H = 1.0]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "An organic compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. What is the empirical formula of the compound? [O = 16.0, C = 12.0, H = 1.0]")