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EVALUATION

Cloze Activity

Read the paragraph below and fill in the missing words.

The less pure substanceĀ  trickles/drips back down the column or back into the conical/round bottomed /flat bottomed flaskĀ  to be heated again. e.g.

If the temperature on glass beads/broken glass/porcelain/shelves is 78oC, the more volatile pure ethanol rise to on the glass beads/broken glass /porcelain /shelves higher in the fractionating column.

Water and then drip/trickle to the /brokenĀ  glass /porcelain /shelves lower in the column because it is less volatile.

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