then a small amount of benzoin is added to observe the color that develops,and the tube is stop and shaken vigorously, the color momentarily disappears;when the solution is let stand, the color reappears.
then a small amount of benzoin is added to observe the color that develops,and the tube is stop and shaken vigorously, the color momentarily disappears;when the solution is let stand, the color reappears.
then a small amount of benzoin is added to observe the color that develops, and the tube is stop and shaken vigorously, the color momentarily disappears; when the solution is let stand, the color reappears.
Then a small amount of benzoin is added to observe the color, that develops and the tube is stop and, shaken vigorously. The color momentarily disappears; when the solution is let stand the color, reappears. .