3. A student boiled some glucose solution and let it cool.
She then added some yeast and set up the apparatus as
shown in the figure. Answer the following questions:
Screw clip
(closed when
experiment
starts)
(a) Why was the glucose boiled and cooled?
(b) What is the purpose of the liquid paraffin?
(c) What process is being investigated?
(d) What result would you expect?
(e) After about an hour in a warm place, the tube
containing the yeast felt warmer than the surroundings
and there was a slight smell of alcohol. Explain these
observations.
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after about an hour in warm place the tube
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