The fermentation process can also be done using a soft-drink bottle as the conta

Question

The fermentation process can also be done using a soft-drink bottle as the container and a balloon attached to the opening of the bottle. I f left alone for a week, what physical observation would give a positive result that the reaction is working? a. The fermentation mixture turns a dirty water color. b. The balloon is inflated. c. The bottle starts to corrode. d. None of the above What property enables one to use distillation for the separation of ethanol from water? a. Melting temperature b. Cohesion c. Boiling temperature d. Viscosity

Explanation / Answer

part (3)

Fermentation reaction results in evolution of carbon dioxide. Due to this, the balloon will start to inflate. After a week, the reaction should get complete and hence it option (b) the balloon is inflated is correct.

part (4)

Distillation is a unit operation where in components are separated on the basis of difference in their relative volatalities. The relative volatalities are a measure of the boiling points of the components. A less volatile component will have more boiling point while more volatile will have less boiling point. The more volatile ones get condensed at top of the column while less volatile ones get collected at bottom. Thus a relative volatality greater than 1 will result in separation. So here, the answer will be (c) boiling temperature.

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