What is osmosis?
Solution and Explanation
The movement of solvent from a region of its high concentration to a region of its low concentration through a semipermeable membrane is called osmosis.
During osmosis, the water molecules (solvent) are free to cross the plasma membrane in both the directions.
Top Questions on What is a Cell Made Up of? What is the Structural Organisation of a Cell?
- Which type of cell division is required for growth and repair of body and which type is involved in formation of gametes?
- CBSE Class IX
- Science
- What is a Cell Made Up of? What is the Structural Organisation of a Cell?
- Carry out the following osmosis experiment: Take four peeled potato halves and scoos each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
- Keep cup A empty
- Put one teaspoon sugar in cup B
- Put one teaspoon salt in cup C
- Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours. Then observe the four potato cups and answer the following:
- Explain why water gathers in the hollowed portion of B and C.
- Why is potato A necessary for this experiment?
- Explain why water does not gather in the hollowed-out portions of A and D.
- CBSE Class IX
- Science
- What is a Cell Made Up of? What is the Structural Organisation of a Cell?
- How does an Amoeba obtain its food?
- CBSE Class IX
- Science
- What is a Cell Made Up of? What is the Structural Organisation of a Cell?
- Where do the lipids and proteins constituting the cell membrane get synthesized?
- CBSE Class IX
- Science
- What is a Cell Made Up of? What is the Structural Organisation of a Cell?
- Which organelle is known as the powerhouse of the cell? Why?
- CBSE Class IX
- Science
- What is a Cell Made Up of? What is the Structural Organisation of a Cell?
Questions Asked in CBSE Class IX exam
- Explain what the reasons for the following are.
(i) Einstein leaving the school in Munich for good.
(ii) Einstein wanting to study in Switzerland rather than in Munich.
(iii) Einstein seeing in Mileva an ally.
(iv) What do these tell you about Einstein?- CBSE Class IX
- A truly beautiful mind
- (i) The kind of person the doctor is (money, possessions)
(ii) The kind of person he wants to be (appearance, ambition)- CBSE Class IX
- The snake and the mirror
In Fig. 9.26, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that ∠ BEC = 130° and ∠ ECD = 20°. Find ∠ BAC.
- CBSE Class IX
- Angle Subtended by an Arc of a Circle
- Name the two temples the author visited in Kathmandu.
- CBSE Class IX
- Kathmandu
Look up the dictionary entries for the words sympathy, familiarity, comfort, care, and surprise. Use the information given in the dictionary and complete the table.
Noun, Adjective, Adverb, Verb, Meaning:
sympathy
familiarity
comfort
care
surprise- CBSE Class IX
- If I were you
Concepts Used:
Osmosis
Osmosis is a passive process and happens without any expenditure of energy. It involves the movement of molecules from a region of higher concentration to lower concentration until the concentrations become equal on either side of the membrane.
There are three different types of solutions:
- Isotonic Solution is one that has the same concentration of solutes both inside and outside the cell.
- Hypertonic solution is one that has a higher solute concentration outside the cell than inside.
- Hypotonic solution is one that has a higher solute concentration inside the cell than outside.