Match the items on the left with the correct description on the right.

1. Thermosiphon a. Produces vapor from the liquid that enters it and provides the distillation column with the vapor necessary for separation inside the column.
2. Cooler b. Uses cooling to convert a substance from a vapor to a liquid
3. Reboiler c. Is used to cool hot liquids
4. Condenser d. Provides circulation based on density differences


1. d. Provides circulation based on density differences
2. c. Is used to cool hot liquids
3. a. Produces vapor from the liquid that enters it and provides the distillation column with the vapor necessary for separation inside the column.
4. b. Uses cooling to convert a substance from a vapor to a liquid

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Which of the following is a true statement about chemical constraints in different agroecological areas of the tropics?

A) Highest phosphorus fixation occurs in semiarid areas. B) Low CEC is most prevalent in acid savannas. C) Acidity without Al toxicity is highest in the humid tropics. D) Aluminum toxicity is most widespread in semiarid areas. E) The proportion of saline soils in the humid tropics is greater than in other regions.

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Which is the preferred method for tire rotation?

A) Side to side B) Modified "x" C) Front to rear D) Full "x"

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Which of the following anatomical structures assists sperm transport?

A. Oviduct B. Uterus C. Both of these D. None of these

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If an employer is convicted of a willful violation of a standard that has resulted in the death of an employee, the offense is punishable by a court-imposed fine or by imprisonment for up to six months, or both.