Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 27

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IMPORTANT

Earn 100

The vapour pressure of a dilute aqueous solution of glucose is $750 mm Hg$ at $373 K$ . The mole fraction of the solute is______.

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Important Questions on Solutions

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NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 28

Which one of the following has the lowest vapour pressure at

20^{0} C

?

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 29

The vapour pressure of benzene at a certain temperature is

640 mm of Hg

. A non-volatile and non-electrolyte solute weighing

2.175 g

is added to

39.08 g

of benzene. The vapour pressure of the solution is

600 mm of Hg

. The molar mass of the solute is____

{g mol}^{-1}

.

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 30

The vapour pressure of a pure liquid

A

is

70 torr

at

27^{0} C

. It forms an ideal solution with another liquid

B

. The mole fraction of

B

is

0.2

and the total vapour pressure of the solution is

84 torr

at

27^{0} C

. The vapour pressure of pure liquid

B

at

27^{0} C

is ______.

HARD

NEET

IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 31

A small amount of a non-volatile, non-electrolyte solute is dissolved in

{56.8 cm}^{3}

of benzene (density

{0.889 g/cm}^{3}

). At room temperature, the vapour pressure of this solution is

98.88 mm Hg

, while that of benzene is

100 mm Hg

. Find the molality of this solution.

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 32

The vapour pressure of benzene at

80^{0} C

is lowered by

10 mm

by dissolving

2 g

of a non- volatile substance in

78 g

of benzene. The vapour pressure of pure benzene at

80^{0} C

is

250 mm

. The molecular mass of the substance will be_____

g {mol}^{- 1}

.

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 33

The vapour pressure of water at

20^{0} C

is

17.54 mm

. When

20 g

of a non-ionic, substance is dissolved in

100 g

of water, the vapour pressure is lowered by

0.30 mm

. What is the molecular weight of the substance?

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 34

Which of the following will have the highest boiling point at

1 atm

pressure?

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IMPORTANT

Chemistry Crash Course NEET>Chapter 8 - Solutions>Level 2>Q 35

The molal boiling point constant for water is

0 . 513^{0} C kg / mol

. When

0.1

mole of sugar is dissolved in

200 mL

of water, the solution boils under a pressure of

1 atm

at______.