मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Give an example of a material used for making semipermeable membrane for carrying out reverse osmosis.

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प्रश्न

Give an example of a material used for making semipermeable membrane for carrying out reverse osmosis.

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उत्तर

Cellulose acetate, potassium ferrocyanide, etc. are used as semipermeable membrane for carrying out reverse osmosis.

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पाठ 2: Solutions - Exercises [पृष्ठ २५]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 2 Solutions
Exercises | Q III. 46. | पृष्ठ २५

संबंधित प्रश्‍न

Determine the osmotic pressure of a solution prepared by dissolving 2.5 × 10−2 g of K2SO4 in 2L of water at 25°C, assuming that it is completely dissociated.

(R = 0.0821 L atm K−1 mol−1, Molar mass of K2SO4 = 174 g mol−1)


Blood cells are isotonic with 0.9% sodium chloride solution. What happens if we place blood cells in a solution containing

(i) 1.2% sodium chloride solution?

(ii) 0.4% sodium chloride solution?


Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.


Define the following term:

Hypotonic solution


Choose the most correct option.

A living cell contains a solution which is isotonic with 0.3 M sugar solution. What osmotic pressure develops when the cell is placed in 0.1 M KCl solution at body temperature?


Answer the following.

Explain reverse osmosis.


Answer the following.

How molar mass of a solute is determined by osmotic pressure measurement?


Explain the osmotic pressure of a solution with the help of a thistle tube.


A solution containing 10 g per dm3 of urea (molar mass 60 g mol−1) is isotonic with 5% solution of non-volatile solute, MB of solute is:


Isotonic solutions must have the same:

(i) solute

(ii) density

(iii) elevation in boiling point

(iv) depression in freezing point


How can you remove the hard calcium carbonate layer of the egg without damaging its semiprermiable membrane? Can this egg be inserted into a bottle with a narrow neck without distorting its shape? Explain the process involved.


Osmotic pressure of a solution increases if


Which one of the following is a colligative property?


The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the decreasing order of osmotic pressure of these solutions is


Assertion (A) : Osmotic pressure is a colligative property.

Reason (R) : Osmotic pressure is proportional to the molality.


Arrange the following solutions in the order of increasing osmotic pressure (π) assuming complete ionization.

  1. 0.5M Li2 SO4
  2. 0.5M KCl
  3. 0.5M Al2 (SO4)3 
  4. 0.1 M BaCl2

Define reverse osmosis.


How will you determine molar mass of solute from osmotic pressure?


Calculate the osmotic pressure of 0.2 M aqueous solution of nonelectrolyte at 300 K. 

[R = 0.082 atm dm3 mol−1K−1]


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