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Which test is useful to distinguish between 2-pentanone and 3-pentanone? |
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Answer» Solution :Since 2-pentanone CONTAINS methyl KETONE `(CH_(3)-overset(O)overset(||)C-)` it undergoes iodoform test with an alkaline solution of iodine and forms yellow precipitate of iodoform But-3-pentanone does not GIVE this test. `underset("2 - pentanone")(CH_(3)-CH_(2)-CH_(2)-overset(O)overset(||)C-CH_(3))+4NaOH +3I_(2)RARR CH_(3)CH_(2)-CH_(2)-overset(O)overset(||)C-ON a +underset("(yellow precipiate)")underset("Iodoform")(CHI_(3)+3H_(2)O+3NaI)` |
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