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KVPY Aptitude Test - Stream SX

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Density of a $2.05 M$ solution of acetic acid in water is $1.02 g / mL$ . Determine the molality(mol/kg) of the solution.

Round of the answer up to two places of decimal.

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Important Questions on Solution & Colligative Properties

MEDIUM

KVPY Aptitude Test - Stream SX

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>Exercise>Q 50

A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of

290 mm

300 K

. The vapour pressure of propyl alcohol is

200 mm

. Determine the vapour pressure of ethyl alcohol is

0.6

, its vapour pressure (in

mm

) at the same temperature would be:

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>KVPY PROBLEMS (PREVIOUS YEARS)>Q 1

The solubility of a gas in a solution is measured in three cases as shown in the figure given below, where $w$ is the weight of a solid slab placed on the top of the cylinder lid. The solubility will follow the order:

Question Image

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KVPY Aptitude Test - Stream SX

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>KVPY PROBLEMS (PREVIOUS YEARS)>Q 2

The boiling points of

0.01 M

aqueous solutions of sucrose,

NaCl

and

{CaCl}_{2}

would be:

MEDIUM

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>KVPY PROBLEMS (PREVIOUS YEARS)>Q 3

A dilute aqueous solution of a polymer of known molecular weight shows an elevation of boiling point of water by

0.052 K

. The molar boiling point elevation constant of water is

0.52 K kg {mol}^{- 1}

. Using these data-

HARD

KVPY Aptitude Test - Stream SX

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>KVPY PROBLEMS (PREVIOUS YEARS)>Q 5

The freezing point of pure benzene is

5.5 ° C

. When

2.9 g

of butane is dissolved in

200 g

of benzene, the freezing point of benzene decreases to

4 ° C

. To lower the freezing point of benzene by another

1.5 ° C

, the amount of butane that has to be added to mixture is:

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Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>KVPY PROBLEMS (PREVIOUS YEARS)>Q 6

The addition of

0.643 g

of a compound to

50 ml

of benzene (density

= 0.879 g {mol}^{- 1}

) lowers the freezing point from

5.51 ° C

5.03 ° C

. If the freezing point constant,

K_{f}

, for benzene is

5.12 K kg {mol}^{- 1}

, the molar mass of the compound is approximately:

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>KVPY PROBLEMS (PREVIOUS YEARS)>Q 7

A solution containing

8.0 g

of nicotine in

92 g

of water freezes

0.925

degrees below the normal freezing point of water. If the molal freezing point depression constant,

K_{f} = 1.85 ° C {mol}^{- 1}

, then the molar mass of nicotine is:

EASY

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SX Chemistry>Chapter 3 - Solution & Colligative Properties>KVPY PROBLEMS (PREVIOUS YEARS)>Q 8

298 K

, the ratio of osmotic pressures of two solutions of a substance with concentrations of

0.01 M

and

0.001 M

, respectively, is:

Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. Determine the molality(mol/kg) of the solution. Round of the answer up to two places of decimal.

Important Questions on Solution & Colligative Properties

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Density of a $2.05 M$ solution of acetic acid in water is $1.02 g / mL$ . Determine the molality(mol/kg) of the solution.

Round of the answer up to two places of decimal.