Test on Distillation for Desalination

Question 1: In a distillation apparatus, steam condenses in the outer tube of the Liebig condenser.

A. Ano

B. Ne

Explanation: The study materials state that 'The steam rises and then goes down the inner tube of the Liebig condenser.' and 'In the condenser the steam is cooled and condenses into a liquid.' This indicates that the steam condenses in the inner tube, not the outer tube.

Question 2: According to the study materials, which statement best explains why distillation is an effective process for making pure drinking water from sea water?

A. The dissolved salts become heavier when heated and sink to the bottom, allowing the pure water to be collected from the top.

B. Water evaporates to form steam, leaving the non-volatile solutes behind, and the steam is then condensed back into liquid water.

C. Sea water is passed through a membrane that selectively allows pure water molecules to pass through while blocking all other substances.

D. The high temperature in the distillation process kills all bacteria and viruses, making the water safe to drink.

Explanation: The study materials explain that in distillation, 'The sea water is heated so that the water evaporates to form steam. The steam is collected and cooled so that it condenses back into liquid water. This water is pure, containing no solutes, because the solutes in sea water cannot evaporate and are left behind.' This aligns with the option stating water evaporation and condensation, leaving solutes behind.

Question 3: The study materials provide a detailed list of specific emergency supplies found on the life rafts of an ocean-going ship.

A. Ano

B. Ne

Explanation: The study materials mention 'emergency supplies on the life rafts of an ocean-going ship' as a topic but do not provide any specific or detailed list of these supplies.

Question 4: The provided study materials detail a comprehensive inventory of specific emergency supplies found on the life rafts of an ocean-going ship.

A. Ano

B. Ne

Explanation: The study materials only state the existence of 'emergency supplies on the life rafts of an ocean-going ship' but do not provide any details or an inventory of what those supplies are.

Question 5: Based on the provided study materials, which statement about the emergency supplies on an ocean-going ship's life rafts is accurate?

A. The study materials describe the specific type of emergency medical kit included.

B. The study materials confirm that such supplies exist.

C. The study materials detail the quantity of fresh water rations.

D. The study materials list all communication devices present.

Explanation: The study materials explicitly state 'emergency supplies on the life rafts of an ocean-going ship', confirming their existence. However, the materials do not provide any details about the specific types, quantities, or lists of these supplies, such as medical kits, water rations, or communication devices.