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Which organic compound is unsaturated?
(1) 2-methylbutane (3) 2-hexanol
(2) 2-chloropropane (4) 2-pentene


Sagot :

The answer is (4) 2-pentene. The pentene belongs to olefin and has double bonds between the carbon atoms. And the other three belongs to alkane which don't have double bonds. So the pentene is unsaturated.