Osmotic Pressure and Osmotic Potential

Q.

What is plasmolysis and deplasmolysis?

Q.

Solute concentration of the solution is inversely related to the osmotic pressure

1. False

2. True

Q. The relationship between the values of osmotic pressure of 0.1M solutions of KNO3 (P1) and CH3COOH ( P2) is 1. P1> P2 2. P2 > P1 3. P1 = P2 4. P1/ P1 + P2 = P2/ P1 + 2P2 Explain with full working

Q.

Which solution will exert highest osmotic pressure?

1. $1\mathrm{M}\mathrm{NaCl}$ solution

2. $1\mathrm{M}$ glucose solution

3. $1\mathrm{M}$ alum solution

4. $1\mathrm{M}$ urea solution

Q. Why does a cell shrink when placed in salt solution?

1. Cells shrink as the cytoplasm will decompose when placed in salt solution.
2. Mineral salts will break the cell wall, causing the cells to shrink.
3. Salt-water enters the cell and breaks the cell.
4. Water comes out of the cell by exosmosis, causing it to shrink.

Q.

(a) Why does the plant cell, placed in a hypotonic solution, not burst?
(b) What happens when a fully turgid plant cell is placed in a hypertonic solution? Name the phenomenon.

Q. Vapour pressure of pure water is 40mm. If a non volatile solute is added to it, vapour pressure falls by 4mm. Calculate molality of solution

Q. An aqueous solution contains 0.4% urea and 3.42% sugar by mass, calculate the osmotic pressure of the solution at 27.

Q. Assuming salts to be 90%dissociated, which of the following will have highest osmotic pressure? 1)decimolar Al2(SO4) 3 2)Decimolar BaCl2 3)decimolar Na2SO4 4)a solution obtained by mixing equal volumes of 2 and 3

Q.

A cell will become flaccid when kept in a ___ solution.

1. Isotonic solution

2. Hypertonic solution

3. Hypotonic or Isotonic solution

4. Hypotonic solution

Q.

Osmotic pressure is the maximum pressure that must be exerted to prevent the passage of solvent into the solution when the two are separated by a semi-permeable membrane.

1. True

2. False

Q.

What is osmoregulation ? Explain in detail.

Q.

Give reasons:

(b) Bacteria and fungi do not grow in pickles, jams, jellies and squashes, etc.

Q.

The combination of pressure potential and solute potential is:

1. Osmotic potential

2. Water potential

3. Field potential

4. Transpiration potential

Q.

When the concentration of water and solutes on either side of the cell membrane is same, the solution is said to be

1. hypertonic

2. isotonic

3. hypotonic

4. none of these

Q.

What is the critical pressure of carbon dioxide?

Q. Assertion :Osmotic pressure is numerically equivalent to the osmotic potential. Reason: Osmotic pressure is the negative pressure applied, while osmotic potential is positive.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

What is the composition of the seminal plasma?

Q.

Why does water diffuse out of a cell if it is placed in a hypertonic solution?

Q.

The net movement of water into or out of the cell is driven by differences in ___ between the extracellular fluid and the intracellular fluid.

1. Diffusion pressure

2. Osmotic pressure

3. Diffusion gradient

4. Tonicity

Q.

Based on the figure given below which of the following statements is NOT correct?

1. Movement of solvent molecules will take place from chamber A to B.

2. Movement of solute also will take place from A to B.

3. Presence of a semipermeable membrane is a prerequisite for this process to occur.

4. The direction and rate of osmosis depends on both pressure and concentration gradients.

Q. Glucose is not stored in plants due to its ability to

1. Decrease osmotic pressure
2. Increase osmotic pressure
3. Decrease turgor pressure
4. Increase turgor pressure

Q. If addition of non volatile solute in water decreases its vapour pressure by 20%. What should be its molality?

Q. Explain why water does not gather in the hollowed-out portions of cups A and D.

Q. Arrange in increasing power of osmotic pressure $\to$ Xerophytes, mesophytes, hydrophytes & halophytes.

Q. Find the density (in g/ml) of a 3.6 M sulphuric acid solution that is 29% H2SO4 by mass

Q.

Given ahead is the diagram of an experimental set up to study the process of transpiration in plants. Study the same and then answer the questions that follow:

Name the colour of dry cobalt chloride paper.
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> [Review Questions - Pg No.66 - Skill Type - 3]

1. Black
2. Blue
3. Red
4. Brown

Q.

Why do xylem cells have extra reinforcements in their cell walls?

1. Prevent transpiration

2. Prevent damages to stem and root

3. To provide colour to plant body

4. Provide access to minerals and water by plant body parts

Q.

If an animal cell is placed into a solution whose concentration of dissolved substances is higher than that inside the cell,

1. the cell will swell

2. the cell will shrivel

3. the solution is described as hypertonic

4. both (b) and (c) are correct

Q.

The main component that determine water potential are

1. Solute potential

2. Pressure potential

3. Suction pressure

4. Both a & b