Chemistry, asked by omkar123433, 10 months ago

assertion the vapour pressure of a liquid if some non volatile solute is dissolved in it
reason the relative lowering of vapour pressure is a solution containing a nonvolatile solid is equal to more fraction of solute in solution​

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Answered by za6715
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CHEMISTRY

Assertion

Relative lowering of vapour pressure is equal to the mole fraction of the solvent

Reason

Relative lowering of vapour pressure is a colligative property

December 30, 2019avatar

Shrashti Lad

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ANSWER

Relative lowering of vapor pressure:

The vapor pressure of a liquid is the pressure of the vapor which is in equilibrium with that liquid. The vapor pressure of a solvent is lowered when a non-volatile solute is dissolved in it to form a solution.The reduction of vapor pressure of solvent is given as

p

1

=x.p

1

0

p

1

is vapor pressure of the solution.

p

1

0

is the vapor pressure of pure solvent

x is the mole fraction of solute

Relative lowering of vapor pressure is p

1

/p

1

0

=x

Where x is mole fraction of solute and not solvent. Statement 1 is false.

Relative lowering of vapor pressure is a colligative property.

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