Dissolve sugar and starch in water and add yeast.
Leave mixture to ferment at 25-40 degrees C for several days in absence of air.
Filter off the excess yeast to obtain a dilute solution of ethanol.
If the ethanol content in the mixture rises to around 15% , yeast is killed(only if more concentrated solution ; the mixture is fractionally distilled.
C6H12O6(AQ)GOES TO 2C2H5OH(AQ) + 2CO2(G)
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