Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 14

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If $P_{0}$ and $P$ are the vapour pressures of a solvent and its solution, respectively, and $N_{1}$ and $N_{2}$ are the mole fractions of the solvent and non-volatile solute, respectively, then the correct relation is:

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Important Questions on Solution & Colligative Properties

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 15

The vapour pressure of a pure liquid solvent

A

is

0.80 atm

. When a non-volatile substance

B

is added to the solvent, its vapour pressure drops to

0.60 atm

. Mole fraction of the component

B

in the solution is:

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 16

Pressure cooker reduces cooking time because

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 17

At higher altitudes, water boils at the temperature

< 100 ° C

because

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 18

The vapour pressure of a dilute aqueous solution of glucose is

750 mm

of mercury at

373 K

. The mole fraction of the solute is

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 19

Y gram

of a non-volatile organic substance of molecular mass

M

is dissolved into

250 gram

of benzene. Molal elevation constant of benzene is

K_{b}

. The elevation in its boiling point is given by:

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 20

Which has the equal boiling point?

( $I$ ) $0.1 M {Na}_{2} {SO}_{4}$

( $II$ ) $0.1 M C_{6} H_{12} O_{6}$ (glucose)

( $III$ ) $0.1 M {MgCl}_{2}$

( $IV$ ) $0.1 M Al {({NO}_{3})}_{3}$

The correct answer is:

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 21

Which of the following has been arranged in the order of decreasing freezing point?

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 22

Aqueous solution of barium phosphate which is

100 %

ionised has

{ΔT}_{f} / K_{f}

as

0.05

. Hence, the given solution is: