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प्रश्न
The highest water potential (capacity to move out higher concentrated solution) is that of ______.
The highest water potential is that of ______
विकल्प
Pure water
10% salt solution
Honey
50% sugar solution
10% sugar solution
उत्तर
Pure water
Explanation:
Water potential is the ability of water to migrate towards a more concentrated solution. It is the highest for pure water.
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संबंधित प्रश्न
A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment:
(i) Give the technical terms of the solutions used in beakers, 1, 2 and 3.
(ii) In beaker 3, the size of the potato cube remains the same. Explain the reason in brief.
(iii) Write the specific feature of the cell sap of root hairs which helps in absorption of water.
(iv) What is osmosis?
(v) How does a cell wall and a cell membrane differ in their permeability?
Complete the following statements:
Hypotonic solution is one in which the solution kept outside the cell has lower solute concentration than ……………… the cell.
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
The diagram given below represents an experimental set-up to demonstrate a certain process. Study the same and answer the questions that follow:
- Name the process.
- Define the above-named process.
- What would you observe in the experimental set-up after an hour or so?
- What control experiment can be set up for comparison?
- Keeping in mind the root hair, cell and its surroundings, name the parts that correspond to
- concentrated sugar solution
- parchment paper
- water in the beaker
- Name any other material that can be used instead of parchment paper in the above experiment.
- Mention two advantages of the process for the plants.
Define the following:
Diffusion
Name the following:
The inward movement of solvent molecules through the plasma membrane of the cell.
What do you mean by transpiration pull ?
Give Reasons for the following.
The raisins swell up in the water.
Give Technical Term for the following.
Solutions which have the same osmotic pressure.
Name the following:
The process by which raisins swell up when placed in a beaker of water.
