Osmosis in Selectively Permeable Membrane

Q. Under what conditions do the plant transpires?
(b) most slowly?

Q.

Raisins shrink in sugar solution give reason

Q.

The rate of transpiration in plants is more when

1. atmosphere is humid

2. atmosphere is dry

3. temperature is low

4. atmosphere is dry and temperature is high

Q. Explain the process of desalination by reverse osmosis? [3 MARKS]

Q.

What is osmotic solution?

Q. Fill in the-blanks with suitable terms given below:
(Fast, leaves, conducting, ascent, Humid)
(d) Most water gets evaporated from the plant from its .

Q.

What is the use of water and mineral which are absorbed by roots?

Q. always occurs across a semi-permeable membrane.

1. Osmosis
2. Imbibition
3. Diffusion

Q. Osmosis is the movement of water molecules from ______________

[Review question: Pg. No: 216]

1. lower concentration to a region of higher concentration.
2. Both of these
3. None of these
4. higher concentration to a region of lower concentration.

Q.

__ is the passage of water from a region of high water concentration to a region of low water concentration through a semi-permeable membrane.

Q. DIRECTIONS: The following questions have four choices (a), (b), (c) and (d) out of which only one is correct. You have to choose the correct alternative.

Raisins are soaked in water for determining the percentage of water absorbed by raisins. The formula, used by a student, for calculating the percentage of water absorbed, is

1. $\frac{Finalweight-Initialweight}{Initialweight}\times 100$
2. $\frac{Finalweight-Initialweight}{Finalweight}\times 100$
3. $\frac{Initialweight-Finalweight}{Initialweight}\times 100$
4. $\frac{Initialweight-Finalweight}{Finalweight}\times 100$

Q.

Diffusion of water across a semi-permeable membrane from an area of high concentration to an area of low concentration

1. Diffusion

2. Osmosis

3. Hypotonicity

4. Hypertonicity

Q.

What is a semipermeable membrane?

Q. Read the following statements and identify the process involved. Mark ‘O’ for Osmosis and ‘D’ for Diffusion.

A.Exchange of gases in roots
B.Raisin soaking up water
C.Absorption of minerals by roots
D.Smoke filling up a room

Choose the correct code for the above.

1. OODD
2. ODOD
3. DDOO
4. DOOD

Q.

What is osmosis? (1 Mark)

Q.

Osmosis is the process by which water moves from area of

___

solute concentration to

___

solute concentration across a semi-permeable membrane.