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Standard XII

Chemistry

Relative Lowering of Vapour Pressure

The vapour pr...

Question

The vapour pressure of pure benzene $C_{6} H_{6}$ at $50^{o} C$ is 268 torr.How many moles of non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167 torr at $50^{o} C$ ?

0.377

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0.605

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0.623

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0.395

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Solution

The correct option is A 0.377
$p = P_{B}^{o} χ_{B}$ (B= benzene acts as solvent)
$χ_{B} = \frac{167}{268} = 0.623$
$χ_{s o l u t e} = 1 - χ_{B} = 0.377$

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Similar questions

Q. The vapour pressure of pure benzene at

50^{o} C is 268 m m of H g

. How many moles of non-volatile solute per mole of benzene are required to prepare a solution of benzene having a vapour pressure

167 m m of H g

50^{o} C

Q. The vapour pressure of pure benzene at

50^{o} C

is 268 mm of Hg. How many moles of non-volatile sohite per mole of benzene are required to prepare a solution of benzene having a vapour pressure 167 mm of Hg at

50^{o} C

Q. The vapour pressure of pure benzene,

C_{6} H_{6}

50^{o} C

is 268 mm. Number of moles of non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167.0 mm at

50^{o} C

is (multiply answer with 10) :

The vapour pressure of pure benzene $C_{6} H_{6}$ at $50^{\circ} C$ is 268 torr. How many moles on non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167 torr at $50^{\circ} C$ ?

Q. The vapour pressure of pure benzene at

50^{\circ} C

268 t o r r

. How many mols of non-volatile solute per mol of benzene is required to prepare a solution of benzene having a vapour pressure of

167 t o r r

50^{\circ} C

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The vapour pressure of pure benzene C6H6 at 50oC is 268 torr.How many moles of non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167 torr at 50oC?

The correct option is A 0.377p=PoBχB (B= benzene acts as solvent)χB=167268=0.623χsolute=1−χB=0.377

The vapour pressure of pure benzene $C_{6} H_{6}$ at $50^{o} C$ is 268 torr.How many moles of non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167 torr at $50^{o} C$ ?

The correct option is A 0.377
$p = P_{B}^{o} χ_{B}$ (B= benzene acts as solvent)
$χ_{B} = \frac{167}{268} = 0.623$
$χ_{s o l u t e} = 1 - χ_{B} = 0.377$