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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Choose the most correct option. In calculating osmotic pressure the concentration of solute is expressed in _______. - Chemistry

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प्रश्न

Choose the most correct option.

In calculating osmotic pressure the concentration of solute is expressed in _______.

पर्याय

  • molarity

  • molality

  • mole fraction

  • mass percent

MCQ
रिकाम्या जागा भरा
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उत्तर

In calculating osmotic pressure the concentration of solute is expressed in molarity.

Explanation:

The pressure difference required to block the flow of solvent across a semipermeable membrane from low concentration solution to high concentration solution is referred to as the osmotic pressure of a solution. In morality, the osmotic pressure of a solution is proportional to the molar concentration.

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पाठ 2: Solutions - Exercises [पृष्ठ ४४]

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बालभारती Chemistry [English] Standard 12 Maharashtra State Board
पाठ 2 Solutions
Exercises | Q 1.03 | पृष्ठ ४४

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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)


Which of the following is not a colligative property?


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?


A solution containing 15 g urea (molar mass = 60 g mol–1) per litre of solution in water has the same osmotic pressure (isotonic) as a solution of glucose (molar mass = 180 g mol–1) in water. Calculate the mass of glucose present in one litre of its solution.


At 300 K, 36 g of glucose present in a litre of its solution has an osmotic pressure of 4.98 bar. If the osmotic pressure of the solution is 1.52 bars at the same temperature, what would be its concentration?


Determine the amount of CaCl2 (i = 2.47) dissolved in 2.5 litre of water such that its osmotic pressure is 0.75 atm at 27°C.


Which of the following 0.1 M aqueous solutions will exert the highest osmotic pressure?


Define Semipermeable membrane


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 in one or two sentences.

What is osmotic pressure?


Answer the following in one or two sentences.

A solution concentration is expressed in molarity and not in molality while considering osmotic pressure. Why?


Answer the following.

Explain reverse osmosis.


An aqueous solution of a certain organic compound has a density of 1.063 g mL-1 , osmotic pressure of 12.16 atm at 25 °C and a freezing point of 1.03 °C. What is the molar mass of the compound?


What are hypertonic solutions?


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


Explain the phenomenon of osmosis.


Define Osmosis.


At constant temperature the osmotic pressure of a solution is ____________.


20 g of a substance were dissolved in 500 mL of water and the osmotic pressure of the solution was found to be 600 mm of mercury at 15°C. The molecular weight of the substance is:


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:


At a given temperature, osmotic pressure of a concentrated solution of a substance ______.


Which of the following statements is false?


Isotonic solutions must have the same:

(i) solute

(ii) density

(iii) elevation in boiling point

(iv) depression in freezing point


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


Match the items given in Column I and Column II.

Column I Column II
(i) Saturated solution (a) Solution having same osmotic
pressure at a given temperature as
that of given solution.
(ii) Binary solution (b) A solution whose osmotic
pressure is less than that of another.
(iii) Isotonic solution (c) Solution with two components.
(iv) Hypotonic solution (d) A solution which contains maximum
amount of solute that can be
dissolved in a given amount of
solvent at a given temperature.
(v) Solid solution (e) A solution whose osmotic pressure
is more than that of another.
(vi) Hypertonic solution (f) A solution in solid phase.

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.


Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision?


Which one of the following is a colligative property?


The vapour pressure of water is 12.3 k pa at 300 k. Calculated the vapour pressure of molal solution in it.


Derive an expression to calculate molar mass of non-volatile solute by osmotic pressure measurement.


Determine the osmotic pressure of a solution prepared by dissolving 2.32 × 10−2 g of K2SO4 in 2L of solution at 25°C assuming that K2SO4 is completely dissociated.

(R = 0.082 L atm K−1 mol, Molar mass K2SO4 = 174 g mol−1)


Isotonic solutions are the solutions having the same ______.


A solution containing 10 g glucose has osmotic pressure 3.84 atm. If 10 g more glucose is added to the same solution, what will be its osmotic pressure? (Temperature remains constant)


Prove that: M2 = `(W_2RT)/(πV)`.


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.


Name the four colligative properties that are oftently used for determination of molecular mass.


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


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