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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

According to Raoult’s law, relative lowering of vapour pressure of solution containing dissolved nonvolatile solute _______.

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प्रश्न

According to Raoult’s law, relative lowering of vapour pressure of solution containing dissolved nonvolatile solute _______.

पर्याय

  • is equal to mole fraction of solvent

  • is equal to mole fraction of solute

  • does not depend on mole fraction of solute

  • is equal to molality of solution

MCQ
रिकाम्या जागा भरा
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उत्तर

According to Raoult’s law, relative lowering of vapour pressure of solution containing dissolved nonvolatile solute is equal to mole fraction of solute.

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Vapour Pressure Lowering
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पाठ 2: Solutions - Multiple choice questions

संबंधित प्रश्‍न

Choose the most correct option.

Pressure cooker reduces cooking time for food because _______.


Answer the following.

Why vapour pressure of a solvent is lowered by dissolving a nonvolatile solute into it?


The following solution/solvent has maximum vapour pressure _______.


The vapour pressure of a pure liquid is 0.043 bar at a certain temperature. When a nonvolatile solute is dissolved into it, the vapour pressure of the solution is found to be 0.041 bar. What is the relative lowering of vapour pressure?


For a very dilute solution, the osmotic pressure is given by π = n2RT/V where V is the volume in L containing n2 moles of nonvolatile solute. Establish the equation for molar mass of solute.


Give two points to explain why vapour pressure of solvent is lowered by dissolving nonvolatile solute into it.


Which of the following is NOT a colligative property?


The vapour pressure of pure solvent and solution are 120 mm Hg and 108 mm Hg respectively. The mole fraction of the solvent in the solution is ____________.


In an experiment, 1 g of a non-volatile solute was dissolved in 100 g of acetone (molar mass = 58 g mol−1) at 298 K. The vapour pressure of the solution was found to be 192.5 mm Hg. The molecular weight of the solute is (vapour pressure of acetone = 195 mm Hg) ____________ g mol−1.


Which of the following is CORRECT statement?


The vapour pressure of pure benzene (molar mass 78 g/mol) at a certain temperature is 640 mm Hg. A nonvolatile solute of mass 2.315 g is added to 40 g of benzene. The vapour pressure of the solution is 600 mm Hg. The molar mass of solute is ______.


At a constant volume, a quantity of an ideal gas has a pressure of 700 mm Hg at 300 K. At what pressure, the temperature will be halved?


According to Raoult's law, relative lowering of vapour pressure for a solution containing a nonvolatile solute is equal to ____________.


Relative lowering in vapour pressure of a solution containing non-volatile solute is the ratio of ____________.


Which of the following is INCORRECT expression in terms of vapour pressure of pure solvent `("P"_1^0)` and that of solution (P)?


The vapour pressure of water at 20°C is 17 mm Hg. The vapour pressure of solution containing 2.8 g urea in 50 g of water is ____________.


Relative lowering in vapour pressure depends on _______.


The vapour pressure of a solvent A is 0.80 atm. When a non-volatile substance B is added to this solvent its vapour pressure drops to 0.6 atm. the mole fraction of B in the solution is ______.


Calculate the mole fraction of solute, if the vapour pressure of pure benzene at a certain temperature is 640 mmHg and the vapour pressure of a solution of a solute in benzene is 600 mmHg.


State and explain Raoult's law for the solution of non-volatile solutes.


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