A fresh Kolanut weighing 1g was put into salt solution. After 3 hour, the kolanut weighed 1.2g. This simple experiment demonstration that
A. the salt solution is more concentrated that the cell sap of the kolanut B. the cell sap of the kolanut is more concentrated than the salt solution C. the salt solution has the same concentration as the cell sap of the kolanut D. kolanut cell can multiply in water E. the kolanut lost some water molecules to the salt solution
Correct Answer: A
Explanation
The correct answer is A: the salt solution is more concentrated than the cell sap of the kolanut.
This is because when a fresh kolanut was placed in the salt solution, it absorbed water from the solution, causing its mass to increase from 1g to 1.2g. This suggests that the kolanut's cell sap was less concentrated than the salt solution, and thus water from the surrounding solution moved into the kolanut cells via osmosis to balance the concentration.
Here’s why the other options are incorrect: - B: the cell sap of the kolanut is more concentrated than the salt solution: If the cell sap were more concentrated, the water would have moved out of the kolanut into the salt solution, causing a decrease in mass, not an increase. - C: the salt solution has the same concentration as the cell sap of the kolanut: If the concentrations were the same, there would be no net movement of water, and the mass of the kolanut would remain constant. - D: kolanut cell can multiply in water: The experiment is about osmosis, not cell multiplication. - E: the kolanut lost some water molecules to the salt solution: This would happen if the salt solution were less concentrated than the cell sap, which is not the case here.
Thus, A: the salt solution is more concentrated than the cell sap of the kolanut is the correct answer.
