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Elevation in Boiling Point

Which of the ...

Question

Which of the following statements is correct for the boiling point of solvent containing a dissolved solid substance

A

Boiling point of the liquid is depressed

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B

Boiling point of the liquid is elevated

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C

There is no effect on the boiling point

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D

The change depends upon the polarity of liquid

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Solution

The correct option is B Boiling point of the liquid is elevated
Dissolution of a non-volatile solute raises the boiling point of a liquid.

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Similar questions

Q. If 0.15 g of a solute, dissolved in 15 g of solvent, increases the boiling point by

{0.216}^{o} C

over that of the pure solvent, the molecular mass of the substance is (Molal elevation constant for the solvent is 2.16^OC$):

Q. Which of the following statement(s) is/are correct?
(a) Non-volatile impurities decrease the boiling point of the substance.
(b) Addition of impurities to a solid decrease the melting point of solid.
(c) Lower the boiling point of a liquid, higher is its rate of evaporation.

0.15 g

of a substance dissolved in

15 g

of a solvent boiled at a temp. higher by

{0.216}^{0} C

then that of the pure solvent. Find out the molecular weight of the substance.

k_{b}

{2.16}^{o} C

0.15 g

of a substance dissolved in

15 g

of a solvent is boiled at a temperature higher by

{0.216}^{\circ} C

than that of the pure solvent. Find out the molecular weight of the substance (

K_{f}

2.16 {K kg m}^{- 1}

)

Q. Which of the following statements about boiling point elevation is not true?
I. Addition of a nonvolatile solute raises the vapor pressure of a solution. Therefore, a higher temperature will be needed to produce boiling.
II. The molal concentration of solute particles dissolved in the solvent is an important factor in determining the molal boiling point elevation constant.
III. The identity of solute particles dissolved in the solvent is an important factor in determining the molar boiling point elevation constant.

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